The largest momentum transferred to the skater is the skater catches the Frisbee, holds it momentarily, and throws it back to her friend.
The skater stands on a frictionless surface and his friend Frisbee starts moving behind him. The lack of friction makes the skater unstoppable.
However, when the skater returns to his friend through the Frisbee again, there is a backward force that increases the skater's speed. So and momentum is directly proportional to velocity, so as velocity increases so does momentum.
In Newtonian mechanics, momentum (more precisely, linear or translational momentum) is the product of an object's mass and velocity. A vector quantity that has magnitude and direction. If m is the object's mass and v is its velocity (which is also a vector quantity), then the object's momentum p is p = mv.
Advanced formulations of classical, Lagrangian and Hamiltonian mechanics allow the choice of coordinate systems containing symmetries and constraints. In these systems the conserved quantity is the generalized momentum, which is generally different from the momentum defined above. The generalized concept of momentum carries over into quantum mechanics and becomes the operator of the wavefunction. The momentum and position operators are related by the Heisenberg uncertainty principle.
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Which one of the following options gives the correct procedure to A. moles x molar mass B. molar mass /moles C. moles molar /mass
A is provided with the proper procedure by moles x molar mass. This same mass metric grams of one mole of an ingredient is its molar mass.
What is matter's mass?The proportion of substance in a thing is measured by its mass. That thing will be the same mass no matter where it is in the enormous universe. Contrarily, weight is a measurement that indicates how much gravitational potential energy is being applied to an object.
Is one mole of mass equal?A pure element's atomic mass in number of atoms (amu) or grams for every mole (g/mol) is proportional to the mass about one mole of its elements in grams. Despite the fact that mass can be stated as either amu or g/mol, g/mol.
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the star betelgeuse is about 600 light-years away. if it explodes tonight, the star betelgeuse is about 600 light-years away. if it explodes tonight, we'll know because it will be brighter than the full moon in the sky. we'll know because debris from the explosion will rain down on us from space. we won't know about it until about 600 years from now.
It is exactly because of the expanding cosmos that we can see objects that are up to 46.1 billion light-year away. The range of objects we can perceive and potentially reach will always be constrained.
Why can't we observe a galaxy that is 15 billion years old?
Answer and justification According to prevailing opinion, we can't see a galaxy 15 billion light-years away because the universe is thought to be less than 14 billion years old.
Why can we observe objects 13 billion light-years away?
Since light travels at a finite speed, if we witness an object 13 billion light years distant, the light has been moving in our direction for 13 billion years. In essence, we perceive that item as
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A semi circle has a radius of 2000km and a thickness of 3000 meters. How many cubic centimeters does it have
The volume of the semi circle in cubic centimeters is 3.75 * 10^22 cm^3
What is the cubic centimeters ?We know that the first step that we would have to take is to be able to get the area of the semi circle and when we do that we are going to have from the values that we have in the question;
A = πr^2
A = area
r = radius
Where r = 2000km or 2 * 10^8 cm
A = 3.142 * (2 * 10^8)^2
A = 1.25 * 10^17 cm^2
Then we would have;
Volume = area * thickness
Thickness = 3000 meters or 3 * 10^5 cm
Volume = 1.25 * 10^17 cm^2 * 3 * 10^5 cm
= 3.75 * 10^22 cm^3
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Which of the following equations correctly represent the conversions between the different units of temperature? Select all that apply. A. degrees Fahrenheit = ( 9/5 x degrees Celsius) + 32
B. Kelvin = degrees Celsius + 273.15
C. degrees Celsius= ( 5/9 x degrees Fahrenheit) -32
D. degrees Fahrenheit = ( Kelvin -273.15) x 5/9
These energy between the various temperature units are accurately represented by formulae in Degrees Celsius = (9/5 x Degrees Fahrenheit) + 32
How is 9 5 converted to a temperature?The Formula for Converting Temperature We employ the same conversion formulas found in the majority of textbooks. To convert temperatures from degrees Fahrenheit to degrees Celsius, multiply the result by.5556 (or 5/9) after subtracting 32. When converting from celsius to Degrees, multiply the result by 1.8 (about 9/5) then by 32.
How do you translate Class 9 in Fahrenheit from Celsius?The formula for converting degrees Celsius to degree Fahrenheit, which would be given by the equation F=95(C)+32, must be used in this situation. Therefore, we must divide the stated temperature by nine, multiply it.
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which of the following statements does not use the term angular size or angular distance correctly? view available hint(s)for part a which of the following statements does not use the term angular size or angular distance correctly? the angular distance between those two bright stars in the sky is about 2 meters. the angular size of the sun is about the same as that of the moon. the angular distance between those two houses in the distance is 30 degrees. you can use your outstretched hand against the sky to estimate angular sizes and angular distances.
There are two prominent stars in the sky that are spatially separated by about two meters.
Which constellation has two of the brightest stars in the universe?
Second brightest and the brightest star in the night sky is Sirius, which is in the constellation Canis Major. With an apparent magnitude of -1.46, Sirius, the second brightest star, can be seen from anywhere. The Canis Major constellation contains the bright star in question. It is the Alpha star of this constellation.
Which of the two shining stars is it in the sky?
The Sun is the brightest star that can be seen from Earth and has a magnitude of 26.74. Sirius comes in second with a magnitude of 1.46 mag.
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Dimensional / Projectile motion (mass has no effect)A 200g ball is thrown up at 25 m/s at 40 degrees.a. How high will it reach? (Hint Vfy=0 at peak)b. How much time will it take to reach peak heightc. How much time will it take to fall back to the ground?(Hint: symmetrical parabola)d. How far will it fall? (Dx=Vox* tair)
The ball of mass 200g reaches a height of 17.2m when it is thrown up at 25 m/s at 40 degrees, the time taken to reach peak height is 1.86s and the total time taken to fall back is 3.72s.
Given mass of the ball (m) = 200g
Initial speed of ball (u) = 25m/s
The angle at which ball is thrown = θ = 40 degrees
The horizontal velocity of ball = uxsinθ = 25 x sin 40 = 18.6m/s
The vertical velocity of ball = uycosθ = 25 x cos 40 = -16.6m/s
(a) Maximum height reached (h) = ux^2sin^2θ/2g where g is the gravitational acceleration.
Then h = (18.6)^2/2 x 10 = 17.2m
(b) The final velocity at maximum height (Vfy) = 0
We know that from Newtons laws of motion v = u + at then
Vy = uxsinθ + (-gt)
then t = uxsinθ/g = 18.6/10 = 1.86s
(c) The amount of time required for an upward and downward route is equal. So, total time taken by the ball to return to the ground = 1.86+1.86 = 3.72s.
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if the swiss franc is trading at 0.69, and a customer buys 1 sep sf 70 put and writes 1 sep sf 65 put, this position is A) calendar spread.
B) bear spread.
C) diagonal spread.
D) bull spread.
Bear spread was correct!.
What exactly is the bear spread strategy?A bear put spread is made up of one long put and one short put with a higher strike price. Both put options have the same underlying stock and expiration date. A bear put spread is constructed for a net negative (or net cost) and gains as the price of the underlying stock falls. Bear may earn from being correct by selling short stocks or ETFs in the market.
This entails borrowing shares and then selling them in the hopes of buying them again at a reduced price and returning the shares to the lender. Inverse ETFs and mutual funds are also available, which increase when markets fall.The bear call spread makes the most money when the underlying price falls.
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TRUE/FALSE. waves are formed by the interrption of the crest of the wave as it slows down over the faster moving bottom of the wave.
False: Waves are generated when the wave's crest crashes into the bottom of the wave, which is travelling more quickly.
How do waves work?A wave is an energetic disturbance in such a medium that doesn't include any net particle motion. Elastic deformation, a change in pressure, a magnetic or electrical intensity, an electric potential, or a change in temperature are a few examples.
What do waves go by?Transverse and longitudinal waves are the two types of waves. While longitudinal waves are similar to those of sound, composed of alternating compressions & rarefactions in a medium, transverse waves were like those on water, having their surface moving up and down.
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A feather and a rock dropped at the same time from the same height would land at the same time when dropped
In a vacuum, both the feather and the rock would fall at the same rate due to the absence of air resistance.
What is resistance?However, in the real world, air resistance can have a significant effect on the feather's descent.Air resistance acts as a drag force on the feather, slowing it down and causing it to fall at a slower rate than the rock.The rock, being denser and heavier, falls faster as it is less affected by air resistance.The difference in their descent is due to the size, shape, and weight of the feather and rock.The feather has a larger surface area relative to its weight, which makes it more susceptible to air resistance.The rock, on the other hand, has a smaller surface area relative to its weight and is less affected by air resistance.Therefore, if both the feather and the rock were dropped from the same height in an environment where air resistance is present, the rock would hit the ground first.However, if air resistance were not present, both would fall at the same rate and hit the ground at the same time.To conclude, the feather and the rock would fall at the same rate in a vacuum, but in the real world, air resistance affects the feather's descent, causing it to fall at a slower rate than the rock, making the rock hit the ground first.To learn more about resistance refer:
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A mass is attached to the end of a spring and set into oscillation on a horizontal frictionless surface by releasing it from a stretched position. If the maximum speed of the object is 2.23 m/s, and the maximum acceleration is 5.77 m/s2, find how much time elapses between a moment of maximum speed and the next moment of maximum acceleration.
(Answer should be in seconds)
Hint: What fraction of a period is the time between the maximum speed and acceleration? How are the maximum speed and acceleration related to the period of oscillation?
The time that elapses between a moment of maximum speed and the next moment of maximum acceleration is 2.43 seconds.
What is the period between maximum speed and acceleration?The time that elapses between a moment of maximum speed and the next moment of maximum acceleration is calculated as follows;
V (max) = 2πfA ------ (1)
a (max) = ( 2πf )² A ------ (2)
where;
f is the frequency of the oscillationA is the amplitude of the oscillationSince both equations have amplitude, A, we will make A the subject of the formula.
A = (V.max) / ( 2πf)
A = (a.max) / ( 2πf)²
(V.max) / ( 2πf) = (a.max) / ( 2πf)²
V.max = (a.max) / ( 2πf)
f = (a.max) / ( 2π x V.max)
Period, T, = 1 / f
T = ( 2π x V.max) / a.max
The period of the oscillation is calculated as follows;
T = ( 2π x 2.23 ) / ( 5.77 )
T = 2.43 seconds
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What is the minimum speed with which a meteor strikes the top of Earth’s stratosphere (about 40.0 km above the surface), assuming that the meteor begins as a bit of interplanetary debris far from Earth and stationary relative to Earth? Assume that the drag force is negligible until the meteor reaches the stratosphere. Mass of Earth is 5.974 × 1024 kg; radius of Earth is 6.371 × 106 m; and gravitational constant is 6.674 × 10−11 N·m2/kg2.
Answer: v = 11149.3 m/s
Explanation:
Assuming that the values in your question were supposed to have exponents.
v = minimum speed
r = distance from center of earth
= radius of earth + height above the surface
= (6.371 * 10^6 m) + (0.40 * 10^5 m)
= 6.411 x 10^6 m
M = mass of earth = 5.974 x 10^24 kg
m = mass of meteor
Using conservation of energy
GMm/r = (0.5) m v^2
GM/r = (0.5) v^2
(6.67 * 10^-11)(5.974 * 10^24)/(6.411 * 10^6) = (0.5) v^2
62153455 = (0.5)v^2
Divide both sides by 0.5
124306910 = v^2
Square root both sides
v = 11149.3 m/s
A basketball player shoots from beyond the 3-point arc. The ball leaves the band with an initial velocity of 8m/s angled 52° from the horizontal. What are the horizontal and vertical velocities of the basketball?
✓
Question 3:
A small cube of mass m₁ slides down a circular track of radius,
cut into a large block of mass m₂ = 2m₁ as shown in the figure
below. The large block rests on a table, and both blocks movė
without friction. The blocks are initially at rest, and m₁ starts
from the top of the path. Find the magnitude of velocity of the
cube as it leaves the block.
The velocity 'v' of the cube as it leaves the block would be, v=[tex]\sqrt{\frac{2gR}{1+m/M} }[/tex].
What is Conservation of mechanical energy?Conservation of mechanical energy is a principle that states that the total mechanical energy of a closed system remains constant as long as no energy is added or removed from the system. In this case, the system consists of the two blocks and the table on which they rest. Since there is no friction and no external force acting on the system, the total mechanical energy (potential energy + kinetic energy) remains constant as the cube slides down the track. This allows us to use the initial potential energy of the cube to calculate its final kinetic energy, and thus its velocity as it leaves the block.
The magnitude of velocity of the cube as it leaves the block can be found using Conservation of mechanical energy.
Initially, the cube is at rest at the top of the track and has only potential energy, given by m₁gh, where g is the acceleration due to gravity and h is the height of the track. As the cube slides down the track, it loses potential energy and gains kinetic energy.
we have
mu=mv−−(1)
wall=Δk
mgR = [tex]\frac{1}{2} mv^{2} + \frac{1}{2} mu^{2}[/tex]
mgR = [tex]\frac{1}{2} mvH_{2}[/tex] + [tex]\frac{1}{2} (\frac{mv}{M} ) ^{2}[/tex] × M
mgR= [tex]\frac{1}{2} mv^{2} + \frac{1}{2} \frac{m^{2} v^{2}}{M}[/tex]
So, v²=[tex]\frac{2gR}{1+m/M}[/tex]
So, v= [tex]\sqrt{\s{\frac{2gR}{1+m/M} }}[/tex].
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Of the list of terms and phrases below, select the ones that describe either formation areas or atmospheric conditions ideal for supercell thunderstorm development.
Group of answer choices
the US Central Plains states in spring
the warm sector of a developing mid-latitude cyclone
strong upper-level convergence
strong surface convergence
strong updrafts
the US Pacific Northwest in summer
cool, dry air in the mid-levels above warm moist air near the surface
strong vertical wind shear
Your students should be informed that the warm sector of a mid-latitude cyclone is the region situated between the leading warm front and the trailing cold front. The space behind the cold front is known as the cold-sector.
In a mid-latitude cyclone, what is its warm sector?Your students should be informed that the warm sector of a mid-latitude cyclone is the region situated between the leading warm front and the trailing cold front. The space behind the cold front is known as the cold-sector.The US Central Plains states in the warm sector of a developing mid-latitude cyclone in the spring are the formation areas or atmospheric conditions optimal for supercell thunderstorm development.Your students should be informed that the warm sector of a mid-latitude cyclone is the region situated between the leading warm front and the trailing cold front.To learn more about atmospheric conditions refer to:
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The ' region shown below is the base of a solid. For this solid, each cross section perpendicular to the x-axis is an equilateral triangle Find the volume of this solid.
As per the problem statement the volume of the solid is (√3/4)*x^2.
What is volume?Volume is the measure of space occupied by an object or contained within a space. It is typically measured in cubic units, such as cubic centimeters, cubic meters, or cubic feet.
The region shown is the base of a solid with an equilateral triangle as each of its cross section perpendicular to the x-axis. Since the cross sections are equilateral triangles, the length of the sides of each triangle will be the same, which is the value of x.
Therefore, the volume of the solid can be calculated using the formula V = A*h, where A is the area of the base and h is the height of the solid.
The area of the base can be calculated using the formula A = (√3/4)*x^2, where x is the length of the sides of the equilateral triangle.
The height of the solid can be calculated using the formula h = y2-y1, where y1 and y2 are the y-coordinates of the two endpoints of the region.
Consequently, the solid's volume is determined by:
V = (√3/4)*x^2*(y2-y1)
For the given region, the volume of the solid is V = (√3/4)*x^2*(1 - 0) = (√3/4)*x^2
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Which of the following changes to the circuit will decrease the electric field between the electrodes by the greatest amount?
a) Increasing L by a factor of 2 b) Decreasing L by a factor of 2 c) Increasing R by a factor of 2 d) Decreasing R by a factor of 2
Electric field (E) is directly proportional to the voltage (V) and inversely proportional to the distance (L) between the electrodes.
What is electric field and calculation for above answer?E = V/LElectric field also inversely proportional to the resistance (R)E = V/RThe circuit is a parallel plate capacitor which the electric field is the driving force that pushes charges around the circuit and the voltage is the energy stored in the circuit.Increasing L by a factor of 2 means that the distance between the electrodes is doubled, and therefore the electric field will be halved.Decreasing L by a factor of 2 means that the distance between the electrodes is halved, and therefore the electric field will be doubled.Increasing R by a factor of 2 means that the resistance is doubled and therefore the electric field will be halved.Decreasing R by a factor of 2 means that the resistance is halved and therefore the electric field will be doubled.Therefore, the change that will decrease the electric field between the electrodes by the greatest amount is decreasing L by a factor of 2.To learn more about electric field refer:
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The electric field will decrease by a factor of two when the distance is increased by a factor of 2 : V = E×d, E = V/d.
Option A is correct
- Since altering R is not directly proportional to E in the same way that altering the distance L is, increasing L is the most efficient approach.
What is an electric field?Electric field, an electric property that is connected to every point in space when any kind of charge is present. The electric field strength, intensity, or simply the electric field is expressed by the value of E, which indicates the magnitude and direction of the electric field.
What is an example of an electric field?The area of space around an electrically charged particle or object in which the charge body experiences force is known as an electric field . Examples: Charges and their configurations, such as those of capacitors and battery cells, produce electric fields.
Question incomplete:Which of the following changes to the circuit will decrease the electric field between the electrodes by the greatest amount?
A.Increasing L by a factor of 2
B. Decreasing L by a factor of 2
C. Increasing R by a factor of 2
D. Decreasing R by a factor of 2
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using the definition of the scalar product, find the angle between the following vectors. (find the smallest nonnegative angle.
When calculating the scalar and vector products, the angle between the vectors is taken into account. The dot product and inner product are other names for the scalar product.
Describe a vector ?In physics, a vector is a quantity with both direction and magnitude. It is often represented by such an arrow whose length was proportional to the size of the number and whose orientation is identical to that of the quantity. In science, anything with also a path and a magnitude is referred to as a vector. They are typically represented by pointing lines, each length of which denotes the size of the vector.
Describe a scalar ?Scalar quantities can be described by their size or magnitude alone and do not require any other information. So, 10 cm, 50 seconds, and 7 litres.
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Large diameter lines carrying low pressure fluids such as engine return oil and cooling air are typically joined by a rubber hose that is slipped over the tube ends and held in place with screw type hose clamps
The main justification is that pressure decreases with surface area. Rubber hoses are widely used to connect large diameter lines that carry low pressure fluids, like cooling air and engine return oil.
The total area of an object's three-dimensional exterior surfaces, or the sum of its faces, is known as surface area. The main justification is that pressure decreases with surface area. Rubber hoses are widely used to connect large diameter. Its measurement units are square. In other words, the sum of all the areas of all the shapes that cover a surface equals the surface area of the object. A circle's diameter is equal to twice its radius in length. Measuring the distance between the circle's centre and its end allows one to determine the radius.
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The complete questions is -
Large diameter lines carrying low pressure fluids such as engine return oil and cooling air are typically joined by a rubber hose that is slipped over the tube ends and held in place with screw type hose clamps, Why?
Determine the following quantities: (a) wavelength λ of a 300 GHz EM wave propagating in free space(b) frequency of an EM wave with λ = 0.1cm(c) dBm equivalent of 120 dB if 0dBm corresponds to 1mW = 10-3 W.
(a) The wavelength of a 300 GHz EM wave propagating in free space is 10 cm.
(b) The frequency of an EM wave with λ = 0.1cm is 3 x 10^7 MHz
(c) The dBm equivalent of 120 dB is 120 dBm if 0dBm corresponds to 1mW = 10^-3 W.
What is wavelength and determine frequency?(a) The wavelength of an EM wave is related to its frequency by the equation:λ = c/f, where λ is wavelength, c is the speed of light in a vacuum (approximately 3 x 10^8 m/s) and f is the frequency of the wave.Given the frequency of the wave is 300GHz, we can plug in the values to find the wavelength:λ = c/f = (3 x 10^8 m/s) / (300 x 10^9 Hz) = (3/300) x 10^-1 m = 0.01 m = 10 cm(b) The frequency of an EM wave is related to its wavelength by the equation:f = c/λ, where f is frequency, c is the speed of light in a vacuum (approximately 3 x 10^8 m/s) and λ is the wavelength of the wave.Given the wavelength of the wave is 0.1cm, we can plug in the values to find the frequency:f = c/λ = (3 x 10^8 m/s) / (0.1 x 10^-2 m) = 3 x 10^8 m/s / (0.1 x 10^-2 m) = 3 x 10^8 m/s / 0.1 x 10^-2 m = 3 x 10^8 m/s / 10^-2 m = 3 x 10^10 Hz = 3 x 10^7 MHz(c) dBm is a unit used to express power levels relative to one milliwatt. The equation to convert between dBm and watts (W) is:P(dBm) = 10 log10(P(W)/1mW)Given 0dBm corresponds to 1mW = 10^-3 W, we can use this equation to find the dBm equivalent of 120 dB :P(dBm) = 10 log10(120/1) = 120 dBmTo learn more about wavelength refer:
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A 300 GHz electromagnetic wave traveling through free space has a wavelength of 10 cm.
(b) An EM wave with = 0.1cm has a frequency of 3 x 10⁷ MHz.
(c) The dBm equivalent of 120 dB is 120 dBm if 0 dBm is equivalent to 1mW = 10 ⁻³W.
What is wavelength and how does frequency get determined?(a) The equation relates an EM wave's frequency to its wavelength:
= c/f, where f is the frequency of the wave, c is the vacuum speed of light (approximately 3 x 10⁸ m/s), and is the wavelength.
We can plug in the values to determine the wavelength since the wave has a frequency of 300 GHz:
= c/f = (3 x 10⁸ m/s) / (300 x 10⁹ Hz) = (3/300) x 10⁻¹ m = 0.01 m = 10 cm
(b) The following equation describes the relationship between an EM wave's frequency and wavelength: f = c/, where f is the frequency, c is the vacuum light speed (about 3 x 10⁸ m/s), and is the wave's wavelength.
We can plug in the values to determine the frequency because the wave's wavelength is 0.1 cm:
f = c/ = (3 x 10⁸ m/s) / (0.1 x 10⁻² m)
= (3 x 10⁸ m/s) / (0.1 x 10⁻² m)
= (3 x 10⁸ m/s) / (0.1 x 10⁻² m)
= (3 x 10¹⁰ Hz)
= (3 x 10⁷ MHz)
(c) The power level is expressed in terms of one milliwatt .The formula for converting dBm to watts (W) is as follows:
Given that 0 dBm corresponds to 1 mW = 10⁻³ W, we can use this equation to determine the dBm equivalent of 120 dB: P(dBm) = 10 log10(P(W)/1mW
P(dBm) equals 120 dBm for 10 log10(120/1).
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A piece of aluminum with mass 1.00kg and density 2700kg/m 3
is suspended in air from a string and then completely immersed in a container of water. Calculate the tension in the string (a) before and (b) after the metal is immersed. Take, g=10m/s 2
, density of water =10 3
kgm −3
.
The tension in the string before the metal is immersed is 10 N. The tension in the string after the metal is immersed is 6.296 N.
What causes a string's tension?The forces tugging on the rope from either end cause a certain strand of string or rope to be under strain. Recall that force equals mass times acceleration. Any change in acceleration or mass of the objects the rope is supporting will result in a change in tension in the rope, assuming the rope is stretched firmly.
(a) The tension in the string before the metal is immersed,
Given,
Mass of place of aluminum (m) = 1.00 kg
density of aluminum (ρ_s) = 2700 kg/m^3
density of water (ρ_w) = 1000 kgm^-3
When the aluminum piece is suspended in air,
T = mg
T = 1 ×10
T = 10 N
(b) When the aluminum piece is completely immersed in water,
mg = T +F_B
Where, F_B = buoyant force acting on aluminum
T= tension in the string
T= mg − F_B
T = ρ_sV_s×g - ρ_LV_L×g
After simplifying we get,
T = mg (1 - ρ_L/ρ_s)
T = 1 × 10(1 - 1000/2700)
T = 10(1 - 10/27)
T = 6.296 N
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water as a resource unit review practice 1 of 91 of 9 itemspause question which of the following describes the relationship between population growth and the underground water supply?(1 point)
Increased population expansion directly increases the demand for resources like water. When the population's need for water exceeds the availability from sources on the surface, such as rivers and lakes underground water is tapped.
What connection is there between population and water?In example, population growth will reduce the amount of water per person accessible since increased per capita water usage brought on by development will raise water demand, placing stress on the local water supply.
What effects does population growth have on groundwater?Producing food Population growth results in increased water consumption as well as increased water requirements for food production. We will need to pump groundwater more quickly than it can be extracted in order to meet the demands for food production brought on by the rapid increase in population.
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. learning over the first year of life, for example the emerging understanding of gravity and stability or the relationship between weight and size
Babies learn to concentrate their eyesight, stretch out, explore, and learn about the world around them during their first year. Cognitive development, often known as brain development, refers to the process of acquiring memory, language, thinking, and reasoning.
What is the significance of the first year of life?The period of infancy is critical for brain development. Children who do not have a healthy first attachment are less likely to grow up to be happy, independent, and resilient individuals.
One of the primary causes is the rapid growth of the brain beginning before birth and continuing throughout early life.
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The diagram shows part of a spring that is shaken from side to side to produce a wave.
0.60m
The distance between successive peaks is 0.60 m and the frequency is 2.5 Hz.
How long does it take for a wave to travel 3.0 m along the spring?
A 0.20 s
B 0.50s
C 2.0s
D 5.0 s
It takes 5.0 s for a wave to travel 3.0 m along the spring.
The time it takes for a wave to travel 3.0 m along the spring is 5.0 s. This can be calculated by dividing the distance (3.0 m) by the wave speed, which is equal to the frequency (2.5 Hz) multiplied by the distance between successive peaks (0.60 m).
3.0 m / (2.5 Hz x 0.60 m) = 5.0 s
What is frequency?
Frequency is a measure of the number of times a particular event or phenomenon occurs within a given period of time. It is usually expressed as an oscillations per second (Hertz). Frequency is an important measure in many fields, including physics, engineering, electronics, and music.
Therefore, It takes 5.0 s for a wave to travel 3.0 m along the spring.
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how long would it take a blue whale from one side of the pacific ocean to find the other at a speed of 5 mps for the 4000 miles it went
It would take a blue whale from one side of the Pacific Ocean to find the other at a speed of 5 mph for the 4000 miles, which is approximately 800 hours or 33 days.
What is the significance of the speed of an organism?The speed of the organism is determined by its body structure and how nature designed it, such as in some fast-swimming fish, which have different body designs than some slow-moving fish. Because of their speed, they can escape and flee predators.
Hence, it would take a blue whale from one side of the Pacific Ocean to find the other at a speed of 5 mph for the 4000 miles, which is approximately 800 hours or 33 days.
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A hot rod of mass 2000 kg, starting from rest
reaches a speed of 120 m/s in only 24.8 s.
What is the average output power?
The power of the hot rod of mass 2000 kg is 580645.16 W.
What is power?Power is the rate at which work is done.
To caculate the power output of the hot rod, we use the formula below.
Formula:
P = mv²/2t.......................... Equation 1Where:
P = Power output of the hot rodm = Mass of the hot rod = 2000 kgv = Velocity of the hot rod = 120 m/st = Time = 24.8 sSubstitute these values into equation 1
P = (2000×120²)/(2×24.8)P = 580645.16 WHence, the power is 580645.16 W.
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a sector with central angle is cut from a circle of radius 12 inches (see figure), and the edges of the sector are brought together to form a cone. find the magnitude of such that the volume of the cone is a maximum.
The magnitude of θ such that the volume of the cone is a maximum is 56.58 degrees when a sector with central angle is cut from a circle of radius 12 inches.
Given the radius of circle (R) = 12 inches
Let the central angle (T) = θ
Volume of cone (V) = πr^2h/3
Let the slant height in cone = s
Let the height of cone = h
we know that for the cone, (r) = sT/(2π)
Then h = √(s^2 - r^2)
Therefore, V = π( sT/(2π) )^2√(s^2 - r^2)/3
To maximize V we need to find dV/dT such that dV/dT = 0
dV/dT = d/dT[π( sT/(2π) )^2√(s^2 - r^2)/3]
Let θ = T then dV/dθ = d/dθ[π( sθ/(2π) )^2√(s^2 - r^2)/3]
(2θs^3/4π)√[(4π^2-θ^2)/(4π^2)] - (θ^3s^3)/(4π√[(4π^2-θ^2)/(4π^2)]) = 0
(2θs^3/4π)√[(4π^2-θ^2)/(4π^2)] = (θ^3s^3)/(4π√[(4π^2-θ^2)/(4π^2)])
θ^2 = 4π^2/(4π^2+1)
θ = 56.58 degrees
Hence the magnitude of θ such that the volume of the cone is a maximum is 56.58 degrees.
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A 3.0 kg object, initially moving to the right with a velocity of + 4.0 m/s experiences a positive net force that decreases linearly throughout the displacement as shown on the graph above. what is the kinetic energy of the object at the instant the net force is zero?
The kinetic energy of an object at a given instant is given by the formula KE = 1/2 * m * v^2, where m is the mass of the object and v is its velocity.
In this scenario, the net force acting on the object decreases linearly throughout the displacement, as shown on the graph, and reaches zero at the end of the displacement. Therefore, the object's velocity at the instant the net force is zero is equal to its final velocity, which is the velocity of the object when it comes to rest.
Since the net force acting on the object is zero at this point, the work done by the net force is also zero. Therefore, the initial kinetic energy of the object is equal to its final kinetic energy, which is the kinetic energy of the object when it comes to rest.
Therefore, we can use the formula for kinetic energy to find the kinetic energy of the object at the instant the net force is zero:
KE = 1/2 * m * v^2
KE = 1/2 * (3.0 kg) * (0 m/s)^2
KE = 0 J
The kinetic energy of the object at the instant the net force is zero is 0 J. This means that the object has come to rest and all its kinetic energy has been transformed into other forms of energy like heat or sound.
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Part D
The quantity represented by v is a function of time (i.e., is not constant).
True or false
Part E a particle moves with constant acceleration a. The expression VI +80 represents the particles velocity at what instant in time.
A. At a time T=zero
B. At the initial time
C. When a time tea has passed since the beginning of the particles motion, when its velocity was the vi
The amount indicated by is not fixed and changes over time. In situations where the linear acceleration is not zero, the velocity is always changing.
The first case is true
Since it depends on time, is not constant?
The amount indicated by is not fixed and changes over time. In situations where the linear acceleration is not zero, the velocity is always changing.
The dimension of the quantity albo will be ufa au av u t when calculating a particle's velocity as a function of time t using the formula v = a(1 - eb), where a and b are constants. (1 - e-b) Greutate, urb'a 221 Aich, a zat a2b3c faut Eleft.
The amount indicated by is not fixed and changes over time. When linear acceleration is absent .
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The quantity represented by v is a function of time (i.e., is not constant).
True or false
A particle moves with constant acceleration a. The expression VI +80 represents the particles velocity at what instant in time.
A. At a time T=zero
B. At the initial time
A particle starts from the origin at time t = 0 and moves along the positive x - axis. The graph of velocity with respect to time is shown in figure. What is the position of the particle at time t = 5s?
In an experiment, students use a force sensor to apply a force of magnitude F to an object of mass m that is initially at rest. The force is exerted in the +x-direction for a time t =T. The impulse exerted on the device is J. Which of following procedure changes would result in an impulse 2J being exerted on an object? A. Exert a force of magnitude F/2 on an object of mass m for a time t =T. B. Exert a force of magnitude F/2 on an object of mass 2m for a time t = 2T. C. Exert a force of magnitude F on an object of mass 2m for a time t = 2T. D. Exert a force of magnitude 2F on an object of mass m for a time t = 2T. E. Exert a force of magnitude 2F on an object of mass m for a time t = .T/2.
The force must be raised to apply an impulse of 2J to an item, either by increasing the force's intensity or the object's mass. The right answer is Option C because it satisfies the requirement by applying a force of magnitude F to an object with mass 2m for some time t = 2T.
What does the physics term "impulse" mean?
To change the momentum of an object, you must exert a certain amount of force over a specific period. It is F times t because of this. For instance, you exert force for a brief period when you hit a ball with a cricket bat.
What is the definition of an impulse simple?
In physics, the term "impulse" is used to characterize or measure the impact of force operating gradually to alter an object's motion. It is often stated in Newton seconds or kilograms per second and is denoted by the symbol J.
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find a unit vector perpendicular and describe geometrically what th eocllection of all such vectors look like.
A unit vector perpendicular to a given vector is a vector of the same length but with a direction that is 90 degrees to the given vector. Geometrically, the collection of all such vectors forms a circle.
What is vector?
Vector is a mathematical object used to represent magnitude and direction. It is composed of a magnitude and a direction that can be represented in Euclidean space by an ordered pair of numbers. A vector can also be represented by a directed line segment to indicate the direction of the vector and its magnitude. Vectors can be used to represent many physical quantities such as velocity, force, acceleration, and electric and magnetic fields. Vectors are also used in calculus to represent derivatives of functions, enabling us to calculate the rate of change of the function.
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