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A roller coaster car of mass 250 kg has a speed of v0 = 12 m s-1 at point A, located at a height of h = 15 m. The car can move with no friction acting between points A and B.
(a) Find the speed of the car when it reaches point B. Use energy ideas.
(b) Once past point B, the car feels a friction force of 2000 N. How far from point B does the car travel before coming to rest?
Calculate the de Broglie wavelength for a proton moving with a speed of 6.3 × 106 m/s. The mass of a proton is 1.67262 × 10-27 kg and Planck's constant is 6.62607 × 10-34 J · s
Unpolarized light passes through two polarizers in turn with polarization axes at 33° to one another. What is the fraction of the incident light intensity that is transmitted
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The system is balanced by a support that is 0.300m from the left end of the plank. How far to the right of the support is the plank's center of gravity.
An autographed baseball rolls off a 0.64m high desk and strikes the floor 0.61 m away from the desk. How fast was it rolling on the desk before it fell off? The acceleration of gravity is 9.80 m/s^2.
A 1940-kg car experiences a combined force of air resistance and friction that has the same magnitude whether the car goes up or down a hill at 32.2 m/s. At what angle is the hill inclined above the horizontal
compare and contrast the eruption styles of the mauna loa volcano in hawaii and mount pinatubo in philippines.be sure
A mortar crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. find How long will the mortar shell remain in the air
An object is in front of a converging lens with a focal length of 11.0 cm. The lens produces a real image located 25.0 cm from the lens. what is the image distance of the new lens
A transformer operating from 79 V (rms supplies a 18.3 V lighting system for a garden. Find the equivalent resistance of the system
An ideal gas expands at a constant total pressure of 2.5 atm from 3.45 L to 6.70 L. What is the total work done on the gas in the process
If you have 1.96 * 10^9 KWH and the value of energy is $0.10 per KWh, what is the value of electrical energy produced
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