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A solid spherical ball of mass 1.21 kg and radius 0.07 m rolls along a smooth, level surface with a speed of 2 m/s. The ball rolls up an inclined plane. How far up the plane does the ball go? Express your answer as the vertical height from the level surface.
A thin metallic shell of radius 40 cm has a charge of -25 nC on it. At the center of sphere is a point charge of 35 nC. What is the electric field 15 cm from the center of the shell.
A cube of mass m = 6.55 kg is placed on an inclined plane of mass M = 10.07 kg, which makes an angle ? = 42.20° with the horizontal. What is the normal force on the inclined plane
A (20.1+/- 0.2)ohm resistor is connected in parallel with a (39.9+/- 0.4)ohm resistor. The resistors are connected to a (2.90+/-0.03)V battery, Calculate the total current in the circuit
True false questions on physics
A penny of mass 3.1g rests on a small 20g block supported by a spinning disk. The coefficients of friction between the block and disk are 0.75 (static) and 0.64 (kinetic).
Automobile windshield wipers can be used intermittently during rainfall. what determines the length of the intervals when the wiper is on and when it is off
Calculate the threshold wavelength, in nm, of a metal if that metal emits an electron with a kinetic energy of 6.32 × 10-19 J when illuminated with light that has a frequency of 1.97 × 1015 Hz.
Suppose you have an electric hot water heater for your house which is an aluminum cylinder which has a 0.46 m radius and is 2 m high. How much energy is lost through the walls of the hot water heater
Illustrate what was the magnitude of the centripetal acceleration of the rock when it was on the string? (b) What was its speed when it was on the string?
Eight identical light bulbs are connected in parallel with a 120-V power source, by two long leads with resistance 1.4 Ohms. 210 mA flow through each bulb, What is the resistance of each bulb
Two workers are trying to move a heavy crate. One pushes on the crate with a force , which has a magnitude of 444 newtons (N) and is directed due west.
Two railroad cars, each of mass 7300 kg and traveling at 73 km/h, collide head on and come to rest. How much mechanical energy is lost in this collision
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