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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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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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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The electric potential V is given as a function of distance x (metre) by V=(5x 2−10x−9) volt. Value of electric field at x=1m is:
Value of electric field at x=1m is
electric field E= [tex]\frac{-dV}{dx} =[/tex] [tex]- \frac{-d(5x^{2} -10x - 9)}{dx}[/tex]
electric field E= -(10x-10)
electric field E= 0
An electric field is a physical phenomenon that surrounds electrically charged particles and exerts force on any other charged particles nearby, either attracting or repelling them. It can also refer to the physical field surrounding a system of charged particles.Electric charges and time-varying electric currents are the building blocks of electric fields. The electromagnetic field, one of the four fundamental interactions (also known as forces) of nature, manifests itself in both electric and magnetic fields.Electrical technology makes use of electric fields, which are significant in many branches of physics. For instance, in atomic physics and chemistry, the electric field acts as an attracting force to hold atoms' atomic nuclei and electrons together.
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When joists do not completely span the distance from one wall to the other, you must offset the markings on the second wall by? A.2" B.3" C.1 1/4" D.1 1/2"
When joists do not completely span the distance from one wall to the other, you must offset the markings on the second wall by 1 1/2 inches. This is known as a "joist hanger offset."
What is Joist Hanger Offset Here are a few key points to consider when dealing with joist hanger offsets:The offset is necessary to ensure that the joists will be properly supported at both ends.Without the offset, the joists would be cantilevered, which can lead to structural problems over time.The offset is typically 1 1/2 inches, but it may vary depending on the specific requirements of the project.It is important to check the manufacturer's specifications for the joist hangers you are using to ensure that you are using the correct offset.Always consult a professional if you are unsure about how to properly offset joist hangers.It is important to note that the joist hanger offset can vary depending on the type of joist hanger you are using. So, always check the manufacturer's specifications for the correct offset. Also, it is always a good practice to consult a professional if you are unsure about how to properly offset joist hangers.To learn more about joist hanger refer:
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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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For a reaction for which the activation energies of forward and reverse reactions are equal:A.ΔH=0B.ΔS=0C.the order is zeroD.there is no catalyst
When the activation energies of the forward and backward processes are equal, the energy of the reactant and product becomes equal.
Therefore, E=EAEB=0. The reaction has reached equilibrium when the forward and reverse reaction rates are equal to one another. When the rate of the forward reaction equals the rate of the reverse reaction, a system is said to be in chemical equilibrium. The activation energy () of the reverse reaction is the SUM of the activation energy of the forward reaction AND the energy released from the forward reaction, according to the information provided.
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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.
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?
A 500 g squirrel with a surface area of 895 cm2 falls from a 5.6-m tree to the ground. Estimate its terminal velocity. (Use the drag coefficient for a horizontal skydiver. Assume that the squirrel can be
approximated as a rectanglar prism with cross-sectional area of width 11.3 cm and length 22.6 cm. Note, the squirrel may not reach terminal velocity by the time it hits the ground. Give the squirrel's
terminal velocity, not it's velocity as it hits the ground.)
x m/s
What will be the velocity of a 50.0 kg person hitting the ground, assuming no drag contribution in such a short distance?
x m/s
8.3 m/s is the terminal velocity of the squirrel can be calculated using the equation for terminal velocity and 10.8 m/s is the velocity of a 50.0 kg person hitting the ground.
What is velocity?
Velocity is a measure of the speed of an object's motion in a particular direction. It is a vector quantity, meaning it has both magnitude and direction. Velocity is usually measured in meters per second (m/s).
The terminal velocity of the squirrel can be calculated using the equation for terminal velocity of an object in a fluid, which is given by Vt = (2×m×g)/(ρ×Cd×A). Here, m is the mass of the object, g is the acceleration due to gravity, ρ is the density of the fluid, Cd is the drag coefficient, and A is the reference area of the object. The drag coefficient for a horizontal skydiver is 0.8, and the density of air is 1.225 kg/m^3. Therefore, the terminal velocity of the squirrel can be calculated as Vt = (2×500×9.8)/(1.225×0.8×895) = 8.3 m/s.
The velocity of a 50.0 kg person hitting the ground can be calculated using the equation for the velocity at the end of a fall, which is given by Vf = sqrt(2×g×h). Here, g is the acceleration due to gravity and h is the height of the fall. Therefore, the velocity of the person hitting the ground can be calculated as Vf = sqrt(2×9.8×5.6) = 10.8 m/s.
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Instantaneous power output of a 3-phase 60 Hz generator will not be constant under following condition:
A. The load draws only real power. B. The load is unbalanced. C. None of the other choices D. The load draws only reactive power. E. The load draws both real and reactive power.
Instantaneous power output of a 3-phase 60 Hz generator will not be constant under following condition when the load is balanced.
Instantaneous power output of a single phase 60 hz generator will be constant under reactive power.
Responsive power is otherwise called: ghost power. One more method for making sense of this is that responsive power is the resultant power in watts of an air conditioner circuit when the ongoing waveform is out of stage with the waveform of the voltage, normally by 90 degrees assuming the heap is simply receptive and is the consequence of either capacitive or inductive burdens. A model is fueling a brilliant light, in a responsive burden energy stream toward the heap a fraction of the time, though in the other half power streams from it, which gives the deception that the heap isn't dispersing or consuming power. Receptive power is one of the three kinds of force present in stacked circuits.
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Block A weighs 12 N and has an apparent weight of 8 N when completely submerged in an ideal fluid. Block B weighs 20 N and has an apparent weight of 12 N when completely submerged in the same ideal fluid. 2. The ratio of the densities Pa/ pe equals: a) 6/5 b) 5/4 c) 4/3 d) 3/4 e) 7/4 3. The ratio of the volumes VA/Vequals: a) 1/3 b) 1/2 c) 3/5 d) 2/3 e) 1/1
1) The ratio of density of A to density of B is 3/2.
2) The ratio of volume of A to the volume of B is 1/3.
How closely a material is packed together is determined by its density. As the mass per unit volume, it is referred to. D or is the symbol for density. Formula for Density = m/V, where is the density, m is the object's mass, and V is its volume.
Given:
Weight of A block = 12 N
Apparent weight of A block = 8 N
Weight of B block = 20 N
Apparent weight of B block = 12 N
Given is a relationship between apparent weight and original weight.
W' = W -B --- (1)
B = W dis liq - ρ liq V obj ---(2)
For block-A :
From equations (1) and (2),
W' = W - ρt V
Substitute the given values,
8 = 12 - ρt V
ρt V = 4 ---(3)
For block-B :
From equations (1) and (2),
W' = W - ρt V
12 = 24 - ρt V
ρt V = 12 ---(4)
From equations (3) and (4)
ρt VA/ρt VB = 4/12
ρt VA/ρt VB = 1/3
As a result, the ratio of volume of A to the volume of B is 1/3.
From given weights of A block and B block,
[tex]W_A}[/tex]/[tex]W_{B}[/tex] = 12/24 ---(5)
weight of an object in terms of volume and density can be written as,
W = ρ Vg
So, equation (5) written as,
ρA [tex]V_{A}[/tex]g/ρB [tex]V_{B}[/tex]g = 12/24
ρA/ρB × [tex]V_{A}[/tex]/[tex]V_{B}[/tex] = 1/2
Substitute [tex]V_{A}[/tex]/[tex]V_{B}[/tex] = 1/3
ρA/ρB ×1/3 = 1/2
ρA/ρB = 3/2
So, the ratio of density of A to density of B is 3/2.
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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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in the town of centralburg (figure 1), which is laid out in a uniform block grid, the grocery store is three blocks east and four blocks north of the post office. which of the following is a correct equation for the quantities represented in this scenario?
A correct equation for the quantities represented in this scenario is
tan Θ=[tex]\frac{d_{n} }{d_{e} }[/tex].
Now, according to the question,
tanΘ=[tex]\frac{opp.\: side}{adj.\: side}[/tex]
Now, by the figure mention,
The side opposite to the angle Θ is [tex]d_{n}[/tex] and the adjacent sides is [tex]d_{e}[/tex].
The three primary trigonometric functions—Sine, Cosine, and Tangent—are based on a right-angled triangle.
Triangle with the opposite side, adjacent side, and hypotenuse can be declared by:
The terms "opposite" and "adjacent" refer to the angle's opposing and adjacent, respectively.
The long one is "Hypotenuse."
Now, put these values in the formula,
which gives the equation,
tanΘ=[tex]\frac{d_{n} }{d_{e} }[/tex]
Now, from the options given it is clearly seen that option-1 is correct.
Question: in the town of centralburg (figure 1), which is laid out in a uniform block grid, the grocery store is three blocks east and four blocks north of the post office. which of the following is a correct equation for the quantities represented in this scenario
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in thermo i, the total energy of the system will include all of the following forms of energy except:
The sum of all the kinetic and potential energies of a system's constituent pieces is the total energy of the system.
What is a thermodynamic system's overall energy?4 Energy total, where e=E/m and u=U/m. The terms "specific total energy" and "specific internal energy," respectively, are used to describe the variables e and u. The potential and kinetic energy are frequently zero or so negligible in the study of thermodynamic systems that they can be disregarded.The sum of all the kinetic and potential energies of a system's constituent pieces is the total energy of the system.Potential energy is both stored energy and positional energy.Chemical energy is the energy held in atoms' and molecules' bonds.Mechanical energy is the energy held under tension inside things.Nuclear energy is the energy that an atom's nucleus stores and uses to maintain its structural integrity.To learn more about total energy refer to:
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A closed piston-cylinder system contains air (molecular weight M = 28.97 kg/kmol) at a temperature of 27'C and an absolute pressure of 100 kPa.
(a) Determine the specific volume of air, in m'/kg. Air in the cylinder is heated without changing its temperature until its volume doubles.
(b) Does the specific volume of air in the cylinder decrease, increase, or remain the same? Justify with quation(s).
c) Does the pressure of air in the cylinder decrease, increase, or remain the same? Justify with equation(s).
(a) The specific volume of air in the cylinder is heated without changing its temperature until its volume doubles is 0.861 m³/kg.
(b) Specific volume of air in the cylinder increases.
(c) The pressure of air in the cylinder decrease.
What is Specific volume?The amount of cubic metres that one kilogramme of matter takes up is known as the specific volume. It is the reciprocal of density and the ratio of a substance's volume to mass. In other words, specific volume is inversely related to density. Any state of matter may be measured or calculated for specific volume, but calculations involving gases are where it is most frequently applied.
Though it can also be expressed in terms of millilitres per gramme (mL/g) or cubic feet per pound (ft³/lb), the standard unit for specific volume is cubic metres per kilogramme (m³/kg).
(a) Specific volume =
[tex]$ \mathrm{ \hat V = \frac{V}{m} = \frac{RT}{P} }[/tex]
[tex]$ \mathrm{ =\frac{\overline RT}{mP} }[/tex]
[tex]$ \mathrm{ = \frac{8.314 \times 300}{28.97 \times 100} }[/tex]
[tex]$ \mathrm{ \hat V = 0.861 \ m^3/kg }[/tex]
(b) Mass will remain constant so on doubling the volume, specific volume will also be doubled i.e.
[tex]$ \mathrm{ \hat V_2 = 2\hat V_1 }[/tex]
Thus, specific volume increases.
(c) Since, T = constant
[tex]$ \mathrm{ P\hat V_1 = P\hat V_2}[/tex]
[tex]$ \mathrm{ \frac{P_2}{P_1} = \frac{\hat V_1 }{\hat V_2 } }[/tex]
[tex]$ \mathrm{ \frac{P_2}{P_1} = \frac{\hat V_1 }{2\hat V_1 } }[/tex]
[tex]$ \mathrm{ \frac{P_2}{P_1} = \frac{1 }{2 } }[/tex]
[tex]$ \mathrm{ P_2= \frac{1}{2} \times 100}[/tex]
[tex]$ \mathrm{ P_2=50}[/tex]
Thus pressure decrease in this case.
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Complete question:
The area of a telescope lens is 7903 mm2. If a technician takes 45 s to polish an area of 135 mm2, how long (in hours) does it take to polish the whole lens? Select all the statements that are correct and relevant to solving this problem. Check all that apply. The starting point for the calculation is 7903 mm2. The solution to the problem will have units of mm2/s. Thc probiem aumes thr the conversóon betven econds and hours s nwm The information contains the conversion factor 5 135 mm The solution to the problem is 0.016 h. Do you know the answer?
The statements that are correct and relevant to solving this problem are:
-The information contains the conversion factor 45s/135mm²
-The starting point for the calculation is 7903 mm².
-The problem assumes that the conversion between seconds and hours is known.
What does "simple computation" mean?Calculation is both a process and a movement. Calculation's ultimate result is also a consequence of calculated action.
The calculator is a machine which thus calculates the average numbers and displays the results on a screen. It has a numerical keypad.
starting point is 7903 mm²
whit will be
A sec, min or her. (Here hour)
hour.
Assumes that the conversion between second and
hour is known.
Conversion factor.4513545-X 7903 = 2634.33 sec135
or 2634.33
0.732 hour
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Complete question:
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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since a short-circuit condition resulting in fault current is of relatively low current magnitude compared to an overload current, removal of the fault current within seconds or minutes will generally prevent damage to the conductor or equipment. True or false?
False. Removing fault current within seconds or minutes may not be enough to prevent damage to the conductor or equipment.
What is meant by a short circuit?
A short circuit is an unintended connection between two points in a circuit that allows current to flow in an unintended path.This usually results in an excessive current draw, which can cause damage to components, overheating, and even fire.Short circuits can be caused by a variety of factors, such as wire insulation failure, faulty wiring, incorrect installation, accidental bridging of two wires, or corrosion.Short circuits can cause serious damage to electronic components and must be avoided.To protect against short circuits, fuses and breakers are used to protect the circuit from an excessive current draw.In addition, wiring should be checked and inspected periodically to ensure that it is in good condition and properly installed.To learn more about short-circuit refer to:
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which statements correctly describe the effect of distance in determining the gravitational force and the electrical force? check all that apply.
Correct options are the gravitational force is inversely to proportional to the distance, and the electrical force is inversely proportional to the square o the distance.
What is relation between distance and force?Electrical force is the force that is exerted on charged particles due to the presence of other charged particles. It is a fundamental force of nature, and it is one of the four fundamental forces of physics, along with the strong nuclear force, the weak nuclear force, and the gravitational force. Electrical force is responsible for the behavior of charged particles in electric and magnetic fields, and it is the force that holds atoms and molecules together. The electrical force is mediated by the exchange of virtual photons.
Both gravitational and electric forces, according to Coulomb's law, decrease with the square of the distance between the objects, and both act along a line between them. However, in Coulomb's law, the magnitude and sign of an object's electric force are determined by its electric charge rather than its mass. Charge thus governs how electromagnetism influences the motion of charged objects.
[tex]$ F = k \frac{q_1q_2}{r^2}[/tex]
F = electric force
k = Coulomb constant
q₁, q₂= charges
r = distance of separation
And
[tex]$F=G{\frac{m_1m_2}{r^2}}[/tex]
F = force
G = gravitational constant
m₁ = mass of object 1
m₂ = mass of object 2
r = distance between centers of the masses
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The complete question is given below:
How do you get part (c)?
Part (a) Which statement best describes the numbers of protons and electrons in the penny when it is charged as indicated?
Electrons were added, and the number of electrons exceeds the
number of protons. ✔ Correct!
Part (b) How many electrons were transferred in order to create the charge on the penny?
Ne = 6.88 * 109
Ne = 6.880×109electrons ✔ Correct!
Part (c) By what percentage do the transferred electrons change the mass of the penny? (Express your result as a positive percentage for an increase, negative for a decrease.)
The percentage at which the transferred electrons change the mass of the penny is [- (n x 9.1 x 10⁻³¹)/m] x 100 .
What is charge?The deficiency or excess of electrons in an atom leads to the development of charge.
The total mass of coin after loosing electrons is calculated as follows;
= m - (n x 9.1 × 10⁻³¹ ) Kg
where;
m is the mass of the penny when no electron is lostn is the number of electronsThere will be decrease in the mass of the penny. So the amount of decrease in mass will be;
= final mass - initial mass
= m - (n x 9.1 × 10⁻³¹ ) - m
= - (n x 9.1 ×10⁻³¹ )
This negative sign indicates that the mass has decreased.
The percentage decrease in the amount of mass transferring the electrons is calculated as;
[- (n x 9.1 x 10⁻³¹)/m] x 100
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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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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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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
small fly of mass 0.28 g is caught in a spider's web. The web oscillates predominately with a frequency of 5.0 Hz Part A What is the value of the effective spring stiffness constant k for the web? Express your answer using two significant figures. VO AED k = N/m Request Answer Submit Part B At what frequency would you expect the web to oscillate if an insect of mass 0.56 g were trapped? Express your answer using two significant figures
The stiffness is 0.21 N/m and frequency is 2.84 Hz.
The effective spring constant k of the web can be determined as follows:
Stiffness is defined as the resistance to forces that bend a component. Firmness is very important to the end-use performance of many papers.
[tex]F= \frac{1}{2pi} \sqrt{\frac{k}{m} }[/tex]
k= 4 pi²f²m
= 0.21875 N/m
The frequency of the web's oscillations can be determined as follows: The frequency of a repeated event is its number of instances per unit of time. It differs from angular frequency and is sometimes referred to as temporal frequency for clarification. The unit of frequency is hertz (Hz), or one occurrence per second.
[tex]F= \frac{1}{2pi} \sqrt{\frac{0.21}{0.56 g} }[/tex]
= 2.84 Hz
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a bead slides without friction around a loopthe-loop. the bead is released from a height of 23.8 m from the bottom of the loop-theloop which has a radius 8 m. the acceleration of gravity is 9.8 m/s 2 .
Now the force equation at point A is given as f (n)= 0.05N
What height must the bead be launched from in order for it to complete the loop, minimum height h?h < (1/2)R.This means that the ball must start at a height that is at least half a radius above the top of the loop, or 2.5 radii above the ground, in order to travel around the entire circle.
v = 12.45m/s
Part B)
F(n) = 0.05N
As we know that the point A lies on the top of the loop
so we will have by energy conservation
so the speed at point A is given as
mg (H-2R) = 1/2 mv ²
v = √2 g (H-2R)
V= 12.45 m/s
Now the force equation at point A is given as
F (n)= 0.05N
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a bar rotates horizontally about its centre, reaching a maximum angular velicity in 6 complete raotaions from rest. the bar has a constant angular acceleratino of .110 radians
A bar rotates horizontally about its center, reaching a maximum angular velocity in 6 complete rotations from rest and has a constant angular acceleration of 0.110 radians.
What is angular acceleration?
The angular acceleration is the rate at which the angular velocity of an object is changing.
Therefore, since the angular acceleration of the bar is constant, this means that the angular velocity of the bar is increasing at a constant rate.
To find the angular velocity at any given time, we can use the equation: angular velocity = angular acceleration x time.
To find the final angular velocity, we can use the equation: final angular velocity = initial angular velocity + angular acceleration x time.
Therefore, the final angular velocity of the bar after 6 complete rotations is: 0 + 0.110 radians/s x (6 x 2π) = 6.832 radians/s.
To find the angle that the bar has rotated through, we can use the equation: angle = angular velocity x time
Therefore, the angle that the bar has rotated through after 6 complete rotations is: 6.832 radians/s x (6 x 2π) = 42.5 radians.
It's worth noting that angular velocity is a vector quantity, it's magnitude is given in radians/s and its direction is given by the right hand rule.
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Complete question is:
A bar rotates horizontally about its center, reaching a maximum angular velocity in 6 complete rotations from rest and has a constant angular acceleration of 0.110 radians. The movement of the interia of the bar about the raxis of the rotation is about 0.0216kgm^.
a. Show the final angular velocity of the bar is 3 radians.
b. Draw the variation with time t of the angular displacement 0 of the bar during the acceleration .
c. Calculate the torque acting on the bar while it is accelerating.
d. The torque is removed. The bar comes to rest in 30 complete rotations with constant angular deceleration. Determine the time taken for the bar to come to rest.
from watching the video, approximate the total time it took for kevin to cross his lawn on the zip line. if kevin has an initial velocity of 3 m/s and comes to a stop at the end of the zip line, calculate the distance he traveled.
The relationship between speed, distance, and time is described using the formula speed distance time. An object traveling 10 miles in 5 minutes averages 120 miles per hour.
What is speed divided by distance?10 miles were covered in total.
It took five minutes in total.
The formula can be used to determine the speed.
s = d/t
s being the speed
D stands for distance.
The amount of time used
Let's change the known variables in the equation above to get
s = 10/5
= 2 miles/minute
However, we must convert the speed to miles per hour in order to use it.
s=2 x 60 miles per hour
120 miles per hour.
An object traveling 10 miles in 5 minutes averages 120 miles per hour.
Consequently, the typical speed is 120 miles per hour.
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Which vector goes from (4, 0) to (1, -3)?
A. a
B. c
C. b
D. d
Answer:
B. Vector c
Explanation:
You have to look for these two points (4,0) and (1,-3) on your graph (x, y) , and then you have to find which vector connects them together and that must be vector c
the average distance from the sun to the earth defines a special unit in astrophysics, the astronomical unit (au). please express this distance in units of cm, m, and km.
1.496E+11 metres, 1.4960E+13 centimetres, and 1.4960E+8 kilometres are all equivalent to one astronomical unit (au). The average distance between the sun and the earth serves as the basis for this peculiar unit.
The distance between any two places in space is equal to the length of the straight line connecting them, which is also the shortest path. This is the usual conception of distance in classical physics, especially in Newtonian mechanics. The straight-line distance is mathematically known as the Euclidean distance in two- and three-dimensional space. The physical concept of distance is employed in physics to explain how far an object has moved. Distance is a scalar quantity. SI units for distance A metre is the unit of distance according to the International System of Units.
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Repe
For a linearly decreasing force, the best way to find the area under the curve ques
is
rectangular approximation
take a wild guess
basic geometry
multiply the force times the distance
calculus
Increasing the separation distance between objects decreases the force of attraction or repulsion between the objects.
What is linearly decreasing force?
The electric lines of force start from a positive charge and ends on a negative charge.The electric lines of force always enter or leave the charged surface normally.Electric lines of force can never intersect each other.Every electric line of force starts with a positive charge and ends with a negative charge. The electric lines of force resist each other in the same direction but In opposite directions, electricity.On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects.To learn more about force refers to:
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