The velocity of the 2x10^4 kg car just before the collision is 0 m/s.
What is conservation of momentum principle?When two bodies of different masses move together each other and have head on collision, they travel to same or different direction after collision.
The external force is not acting here, so the initial momentum is equal to the final momentum. For inelastic collision, final velocity is the common velocity for both the bodies.
m₁u₁ +m₂u₂ =(m₁ +m₂) v
Substitute the values for m₁ = 1.5 x 10^4 kg, m₂ =2 x 10^4 kg and u₁ =7 m/s, the final velocity is 3m/s/
1.5 x 10^4 x 7+2 x 10^4 x u₂ = (1.5 x 10^4 + 2 x 10^4) x 3
u₂ = 0 m/s
So, the car with mass 2x10^4 kg is stationary.
Thus, the velocity of the 2x10^4 kg car just before the collision is 0 m/s.
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If an object is neutrally buoyant (does not sink or float) in fresh water, the same object placed into salt water would
If an object is neutrally buoyant (does not sink or float) in fresh water, the same object placed into salt water would float.
What is Buoyancy?Buoyancy is the force through your fluids or total or submerged bodies. Also known as Archimedes' theorem. The fluid of the direction on the body produces a resultant force but with the direction of the weight, with the opposite direction, upwards.
In this case, we have salt water that is denser, allowing almost no objects to sink, so the buoyant force is greater that acts on the object.
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Would young rocks be found near a volcano?
Answer:
Yes, young rocks typically occur around volcanoes since they are closer to the crate, thus the magma is beginning to cool down to form rocks or it has recently cooled down.
Explanation:
yes
new forms of extrusive igneous rocks will be created as lava cooling and hardening will create new and young rocks
A proton moves in the negative x-direction through a uniform magnetic field in the negative y-direction what is the direction of the magnetic force acting on the proton?
out of the page
into the page
in the positive y-direction
in the negative y-direction
A proton travels through a constant magnetic field in the negative y-direction while moving in the negative x-direction. The proton will be subject to a magnetic pull that is directed into the page. Option B is correct.
What is the right-hand thumb rule?Hold a current-carrying conductor in your right hand with your thumb pointing in the direction of the current then wrap your fingers around the conductor and orient them in the direction of the magnetic field lines.
A proton travels through a constant magnetic field in the negative y-direction while moving in the negative x-direction.
The proton will be subject to a magnetic pull that is directed into the page.
Hence, option B is correct.
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NEED ANSWER ASAP!!! Angela has a bucket of mass 2 kg tied to a string. She places a drinking glass of mass 0.5 kg in the bucket. She spins the bucket in a vertical circle of radius 1.5 m. You want to find out how fast she must swing the bucket to keep the glass from falling out.
a. Draw the free-body diagram for the glass when it is at the top of the circle.
b. What is the equation for the net force on the glass at the top of the circle in terms of w, Fn, m, v, and r?
c. The glass will fall out of the bucket if the normal force between the glass and bucket equals zero. How fast must she spin the bucket to prevent this from happening?
d. The string will break if the tension on it is more than 100 N. Over what range of speeds can she keep the glass in the bucket and prevent the string from breaking?
a. The free-body diagram for the glass when it is at the top of the circle is attached below.
b. The equation for the net force on the glass at the top of the circle in terms of w, Fn, m, v, and r is mg x g + N - mg x Vtop² /R =0
c. The glass will fall out of the bucket if the normal force between the glass and bucket equals zero. The speed with which she spin the bucket to prevent this from happening is 3.83 m/s.
d. The string will break if the tension on it is more than 100 N. The range of speeds can prevent the string from breaking is 3.83< Vtop<4.99 m/s
What is Net force?When two or more forces are acting on the system of objects, then the to attain equilibrium, net force must be zero.
Given, Angela has a bucket of mass 2 kg tied to a string. She places a drinking glass of mass 0.5 kg in the bucket. She spins the bucket in a vertical circle of radius 1.5 m. She must swing the bucket to keep the glass from falling out.
a. The free body diagram of the bucket and glass is attached below.
b. Bucket will undergo centrifugal force
Fb = mVtop² /R
From the equilibrium of forces, we have
For bucket,
T +mb xg - N = mb x Vtop² /R..............(1)
For glass,
mg x g + N = mg x Vtop² /R..............(2)
Thus, this is the net force equation on the glass.
c. On adding both the equations. we have
T + (mb + mg) xg = (mb + mg) Vtop² /R
Substituting the values, T = 0 and from the question, we get
0 + (2+0.5) 9.81 = (2+0.5)(Vtop²/0.5)
Vtop = 3.83 m/s
Thus, the speed of spin to prevent glass from falling out is 3.83 m/s
d. The string will break if the tension on it is more than 100 N
100 + (2+0.5) 9.81 = (2+0.5)(Vtop²/0.5)
Vtop = 4.99 m/s
Thus, the range of velocity is 3.83< Vtop<4.99 m/s
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as resistors are added in series
Answer:
decrease,inverse
Explanation:
........................
What words experiences in Niels Bohrs life That led to his interest in science and the study of the atom
The words experiences in Niels Bohr's life that led to his interest in science and the study of the atom is he disliked writing essays and talented in mathematics.
What is atom?Atom is the smallest unit of the element. Different elements have different size atoms and same element have same size atoms.
Neil Bohr loved talking, he had a disliking of writing essays. He was talented in mathematics. He then attracted to the sciences. Physics interested Neil and when he was a teenager, he started correcting the mistakes in his school's textbooks.
The contributions are present in the modern atomic model. They are: All matter consists of atoms. Atoms of the same element are the same in size and atoms of different elements are different. Atoms combine in whole-number ratios to form compounds.
Thus, Physics interested him to further study for atom.
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Find the mass of a sample of water if its temperature dropped 24.8 °C when it lost 870 J of
heat. (Remember that specific heat capacity of water 4200 J/kg °C)
Answer:
8.35 ×[tex]10^{-3}[/tex] kg
Explanation:
Remember the formula for heat:
[tex]Q=mc\Delta T[/tex]
You just need to solve for m, doing so you're left with:
[tex]m=\dfrac{Q}{c\Delta T}[/tex]
Replace the variables with numbers and that's it.
The mass of a sample of water is 0.841 kg.
What is specific heat?Specific heat is the amount of heat energy required to raise the temperature of one unit of mass of a substance by one degree Celsius (or Kelvin). It is a characteristic property of a substance that reflects its ability to store and release thermal energy.
Different substances have different specific heat capacities, depending on their chemical composition and physical properties. For example, water has a high specific heat capacity of 4,200 joules per kilogram per degree Celsius (J/kg°C), which means that it takes a large amount of heat energy to raise the temperature of water by one degree Celsius. In contrast, metals such as copper and aluminum have much lower specific heat capacities, which means that they heat up and cool down more quickly than water when subjected to the same amount of heat energy.
The specific heat of a substance can be measured experimentally using calorimetry, which involves measuring the amount of heat energy absorbed or released by a substance as it undergoes a change in temperature. The specific heat of a substance is an important parameter in many fields of science and engineering, including thermodynamics, materials science, and environmental science.
Here in the Question,
We know the formula:
Q = mcΔT
where:
Q = amount of heat lost by the sample of water, which is -870 J (negative because heat is lost)
m = mass of the sample of water, which is what we need to find
c = specific heat capacity of water, which is 4200 J/kg °C
ΔT = change in temperature, which is -24.8 °C (negative because temperature dropped)
Substituting the values, we get:
-870 J = m(4200 J/kg °C)(-24.8 °C)
Simplifying, we get:
m = -870 J / (4200 J/kg °C × -24.8 °C)
m = 0.841 kg
Therefore, the mass of the sample of water is 0.841 kg.
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a bicycle rider pedals towards a hill at a speed of 7.5w/s. the combined mass of the bicycle and the rider is 75.0kg the cycle and rider roll up a hill without peddling . at what height will the cycle cone to rest (use g=10N/1g)
Answer:
2.8125 meters
Explanation:
I will assume 7.5 m/s
When the Kinetic Energy is entirely converted to Potential energy the max height will have been reached
KE = PE
1/2 m v^2 = mgh divide by m
1/2 v^2 = gh looking for h so divide both sides by
1/2 v^2 / g = h sub in the values using g = 10 m/s^2
1/2 ( 7.5 )^2 / 10 = 2.8125 m
Which one of these is a compound
Answer:
(b) see attached
Explanation:
A compound is composed of molecules, each of which is composed of atoms of two or more different elements.
A single atom of any type is not a compound, nor is a collection of atoms of the same type.
__
The attached figure shows a molecule of HCl, hydrogen chloride. It is a compound.
A point charge of 5.0 x 10^-7 C moves to the right at 2.6 x 10^5 m/s in a magnetic field that is directed into the screen and has a field strength of 1.8 x 10^-2 T.
What is the magnitude of the magnetic force acting on the charge?
The magnitude of the magnetic force acting on the charge is 2.34×10⁻³ N.
What is magnetic force?
A magnetic force is the force that act in a magnetic field.
To calculate the magnetic force, we use the formula below.
Formula:
F = qvB.........Equation 1Where:
F = magnetic forceq = point chargev = Velocity of the the chargeB = Field strengthFrom the question,
Given:
q = 5.0×10⁻⁷ Cv = 2.6×10⁵ m/sB = 1.8×10⁻² TSubstitute these values into equation 2
F = (5.0×10⁻⁷)(2.6×10⁵)(1.8×10⁻²)F = 23.4×10⁻⁴F = 2.34×10⁻³ NHence, the magnitude of the magnetic force acting on the charge is 2.34×10⁻³ N.
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Magnification of the image is formed by a mirror is -1.25,then answer the following questions
1. Mention the position of the object on the principle access
2. What kind of mirror is used to get the image
3. Mention the characteristics of the image
4. What is the height of the image if the object size is 2 cm
Answer:
below
Explanation:
1. in front of the mirror
2. convex mirror
3.upright and diminished
4.magnification= image height÷object height
-1.25=i.h÷2
ih=-1.25×2
i.h=-2.5
A 3-V adaptor using a half-wave rectifier must supply a current of 0.5 A with a max- imum ripple of 300 mV. For a frequency of 60 Hz, compute the minimum required smoothing capacitor.
The minimum required smoothing capacitor is determined as 27.8 mF.
Minimum required smoothing capacitor
The minimum required smoothing capacitor is calculated as follows;
Ripple amplitude is given as;
[tex]V_R = \frac{I_L}{C_1f_{in}}[/tex]
where;
VR is maximum ripple voltagef is frequencyC1 is smoothing capacitorI is current[tex]C_1 = \frac{I_L}{V_Rf_{in}}\\\\C_1 = \frac{(0.5)}{(300 \times 10^{-3})(60)} \\\\C_1 = 0.0278 \ F\\\\C_1 = 27.8 \ mF[/tex]
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3. Magnetite is
a) Natural magnet
(b)Artificial magnet
(c) Not a magnet
[tex] \huge \bold \red {Aɴswᴇʀ}[/tex]
Magnetite is a Natural magnet
The satellites of Jupiter, Ganymede and Europa, orbit the planet in 7.1 days and 3.5 days. About what is the ratio of the orbit period of Europa to Ganymede expressed as a simple fraction involving the numbers 1,2,3 or 4 in the numerator or denominator
Answer:
1/2
Explanation:
Europa = 3.5 days
Ganymede = 7.1 days
E/U = 3.5 / 7.1 ~~ 1/2
Which particle would have the longest de broglie wavelength traveling with the same velocity?.
The particle would have the longest De Broglie wavelength traveling with the same velocity, which has lesser frequency.
What is wavelength?
The wavelength is the distance between the adjacent crest or trough of the sinusoidal wave. The wavelength is the reciprocal of the frequency of the wave.
Wavelength λ = c/f
where c is the speed of light in vacuum = 3*10⁸ m/s
As, the wavelength and frequency are inversely related to each other. When the wavelength is longer, the frequency will be lesser to the same value of speed of wave.
Thus, the particle with less frequency has longest De Broglie wavelength.
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In a solar system, two comets pass near the sun, which is located at the origin. comet e is modeled by quantity y plus 16 end quantity squared over 400 plus x squared over 144 equals 1 and comet h is modeled by quantity y plus 13 end quantity squared over 144 minus x squared over 25 equals 1 comma where all measurements are in astronomical units. part a: what are the vertices for the path of comet e
The vertices of the path of the comet e are (-12,0) and (+12,0) as it is moving an elliptical path.
Given, that the Sun is located at the origin.
Comet e is modeled by
((y + 16)²)/400 + (x²)/144 = 1
This is an equation of an ellipse. So, the path traveled by Comet e is an elliptic path.
Comparing with the Standard equation of ellipse:
((y - k)²)/(b²)+ ((x - h) ²)/(a ²) = 1
whose, Centre is (h,k) and Vertex is (h±a, 0)
On Comparing Centre (h, k), h= 0 and k = -16 &
a²=144
a = 12
and,
b²=400
b=20
So, Centre (0, -16),
Vertex (-12,0) and (+12,0)
So, the vertices of the path of the comet e are (-12,0) and (+12,0).
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The sun is considered a G2V star. What does the "V" indicate in this designation? Question 21 options: That the sun is a main sequence star. That the sun has an absolute magnitude of 5.0. That the sun is a member of the fifth generation of stars in the universe. That the sun is a star visible from Earth with the unaided eye.
The function of V" in this designation is A. That the sun is a main sequence star
What is the sun?It should be noted that the sun is the star at the center of the solar system.
In this case, the function of V" in this designation is that the sun is a main sequence star
In conclusion, the correct option is A.
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A car of mass 750 kg accelerates away from traffic lights. At the end of the first 100 m it has reached a speed
of 12 m/s. During this time, its engine provides an average forward force of 780 N, and the average force of
friction on the car is 240 N.
a Calculate the work done on the car by the force of its engine.
b Calculate the work done on the car by the force of friction.
c Using ke. = mv2, calculate the increase in the car's kinetic energy at the end of the first 100 m.
d Explain whether your answers are consistent with the principle of conservation of energy.
the work done on the car by the force of its engine is 78,000 J.
" The work done on the car by the force of friction is 24,000 J.
Increasing the car's kinetic energy at the end of the first 100 m is 54,000J
a. Completed work = force x distance. Engine output = 780 N, that is,
780 N x 100 m = 78,000 J.
b. Completed work = force x distance. Friction force = 240 N, that is,
240 N x 100 m = 24,000 J.
c. Kinetic energy = 1 \ 2 x m x v2
= 1 \ 2 x 750 kg x 12 squared = 375 x 144 = 54,000 J.
How powerful is the engine of a car?Mainstream car and truck engines typically produce 100-400 pounds. -Torque feet. This torque is generated by the engine piston as it moves up and down on the engine crankshaft, causing the engine to rotate (or twist) continuously.
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WHOEVER ANSWERS FIRST GETS BRAINLEST
Match the scenario to the term it represents.
Laura develops programs that flag suspicious network activity.
Greg calibrates electronic scales.
Tim ensures the output of a process remains in a defined range.
matching words-
communications
manufactoring
healthcare
Communications: Laura develops programs that flag suspicious network activity.
What is communication?Communication involves the transfer of information from one person (sender) to another (recipient), especially through the use of semiotics, symbols, signs and network devices.
How to match the scenarios?Communications: Laura develops programs that flag suspicious network activity.Healthcare: Greg calibrates electronic scales.Manufacturing: Tim ensures the output of a process remains in a defined range.Read more on communication here: https://brainly.com/question/26152499
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state advantages of ultrasonic sound in determining the depth of the ocean
Answer:
It has greater accuracy than other nondestructive methods in determining the depth of internal flaws and the thickness of parts with parallel surfaces.
Explanation:
Hope this helps you!
Which vector is the sum of the vectors shown below?
A.
B.
C.
D.
Answer:
B.
Explanation:
The addition of vectors is commutative, so adding in any order will lead to the same result; just draw a straight line from the starting point to the tip of the final vector.
The strength of a magnetic field around a wire carrying a current of 20 A is 0.004 T. What is the strength of the magnetic field if the current is changed to 40 A ?
Given the increased current, the strength of the magnetic field around the wire carrying the current increases to 0.008T
What is the strength of the magnetic field if the current is changed to 40 A ?Given that;
First scenario
Strength of magnetic field B = 0.004TCurrent A = 20ASecond scenario
Strength of magnetic field B' = ?Current I' = 40AFirst, we determine the strength of the magnetic field.
B/I = B'/I'
0.004T/20A = B'/40A
B' = ( 0.004T × 40A ) / 20A
B' = 0.16AT / 20A
B' = 0.008T
Given the increased current, the strength of the magnetic field around the wire carrying the current increases to 0.008T
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2) A skier stands at rest and begins to ski downhill with an acceleration of 3.0 m/s² {downhill). What is
her displacement after 15.0 seconds?
Answer:
her displacement s=337.5m
Explanation:
check out the above attachment ☝️
Displacement after 15.0 seconds s= 337.5 m
What is acceleration?
The rate of change of velocity is called acceleration.
Acceleration. speed is the charge of the exchange of displacement. Acceleration is the charge of the exchange of speed. velocity is a vector quantity because it consists of each significance and direction. Acceleration is also a vector quantity as it's far just the fee of alternate of pace.
Acceleration of 3.0 m/s²
Time= 15.0 seconds
S= ut + 1/2 at²
S = 0+0.5*3*15*15
=337.5 m
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What must be known to determine the direction of the magnetic force on a change? Check all that apply.
What we must know to determine the direction of the magnetic force on a charge are;
The type of the charge.The direction of the magnetic field.The velocity of the charge.How to find the direction of magnetic force?The magnetic force is the force of attraction or repulsion that emerges between electrically charged particles since of their movement.
From right hand rule, to determine the direction of the magnetic force on a charge, we must know;
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The orbits of all the planets in the solar system are slightly elliptical with the exception of _______.
Except for Pluto, all of the planets in the solar system have slightly elliptical orbits.
What distinguishes Pluto from other planets in terms of its orbit?Pluto, a dwarf planet, the orbit is highly elliptical, with an eccentricity of 0.25, and it travels between 4.4 and 7.4 109 kilometers (2.7-4.6 109 miles) from the Sun on average. As a result, Pluto's orbit occasionally brings it closer to the Sun than Neptune, which implies that sometimes Pluto is much closer to the Sun than other times.
Pluto orbits the Sun at an angle of 17 degrees. This indicates that Pluto occasionally orbits above the other planets and occasionally orbits below them.
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the magnitude of the electric potintial and of the electrolstatic force depend on which two factors
answer:
Distance and amount of charge
also:
size, type
Electrostatic force F=k Q q / r^2
It depends on
1. Charge on which force is acting.
2. Charge due to which force is acting
3. Distance between the two charges.
4. Material medium in which the charges are placed (eg air, water, oil etc)
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maitri goel
Find the momentum of a body of mass 5kg moving with velocity of 4.5m/s
Momentum= mass × velocity
momentum= P
P= m×v
P= 5×4.5
P=22.5
I hope this helps.
What celestial body is used to measure siderial day?
Point of Aries is a celestial body which can be used to measure sidereal day.
What is a sidereal day?A sidereal day can be defined as an amount of time that it takes planet Earth to rotate once about its axis relative to the stars, so that distant stars appear within the same position in the sky.
Based on astronomical information and records, Point of Aries is a celestial body which can be used to measure sidereal day because it's the amount of time between two (2) consecutive transits of the First Point of Aries.
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solar power—generating facilities that generate electricity at large centralized facilities and transmit that power to homes and businesses through the electric grid are called ________.
Concentrated solar power facilities are solar power—generating facilities that generate electricity at large centralized facilities and transmit that power to homes and businesses through the electric grid .
What is solar power?Solar power refer to electric power or electricity that is generated from sun rays or radiations while using solar panels and other technologies.
Therefore, Concentrated solar power facilities solar power—generating facilities that generate electricity at large centralized facilities and transmit that power to homes and businesses through the electric grid.
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Propane (c3h8), a common fuel, reacts with oxygen to form carbon dioxide and water according to the equation below. c3h8 5o2 → 3co2 4h2o how many grams of oxygen are required to produce 37.15 g co2? 37.15 g co2 = g o2
The amount of oxygen will be 22.29 gm required to produce 37.15 g co₂.
What is a chemical reaction?One or more compounds, known as reactants, are transformed into one or more distinct substances, known as products. Such a process is known as a chemical reaction.
Given reaction;
[tex]\rm C_3h_8 +5O_2 }\rightarrow 3CO_2 +4H_2O[/tex]
The quantity of oxygen is x and the quantity of carbon dioxide is y then the ratio of their composition is found as;
5x=3y
5x=37.15
x=3×37.15/5
x=22.29 gm
Hence the amount of oxygen will be 22.29 gm
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Answer: 45.02 (g O2)
Explanation: The person above me is wrong...but this is the right answer on edge! Ik cuz i just did this assignment and got 100% Hope this helps :D
