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A 1000kg car moving 40m/s skids to a stop. During the skid, the only force is the frictional force between the tires and the road, which is 6000N. Use work and energy to find the distance the car moves before coming to a stop.
Suppose that the sound level of a conversation is initially at an angry 70 dB and then drops to a soothing 50 dB. determine the final sound wave amplitudes
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. Find the speed of the wagon after the rock is thrown (a) directly forward in one case and (b) directly backward in another
suppose that .12 mol of nitrogen gas in contact with a thermal reservoir that holds the temperature fixed at T0=9.8C has an initial volume of 1.3L and does 14J of work
A square loop of wire consisting of a single turn is perpendicular to a uniform magnetic field. What is the flux that passes through the circular loop
In this problem you will model helium-3 as a non-interacting Fermi gas. Although 3He liquefies at low temperatures, the liquid has an unusually low density and behaves in many ways like a gas because the forces between the atoms are so weak. Heliu..
A cosmic ray proton streaks through the lab with velocity 0.80c at an angle of 55° with the +x direction (in the xy plane of the lab). Compute the magnitude and direction of the proton's velocity
A 1.80 m length of wire is held in an east-west direction and moves horizontally to the north with a speed of 15.3 m/s. The vertical component of Earth's magnetic field in this region is 40.0 µT directed downward. Calculate the induced emf between th..
A 79, 37--long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 13 ball of clay travelling horizontally at 2.6 hits and sticks to the extremely bottom tip of the rod.
A fellow student of mathematical bent tells you that the wave function of a traveling wave on a thin rope isy(x,t)= 2.10mm cos[( 6.96rad/m )x+( 744rad/s )t]. Determine the average power transmitted by the wave
a 5.0 kg ball is initially sitting at rest on top of a 48 meter hill. the ball is pushed with a force of 25 n for 3.0 s
A 70.0 kg skier with an initial speed of 13.0 m/s coasts up a 2.50 m high rise as shown in Figure 6.23. Find his final speed at the top
What mass can it support in water before sinking. Two concentric spherical shells with uniformly distributed masses M1 = kg and M2 = kg are situated as shown . Find out the magnitude Find the magnitude of the net gravitational force on a particle ..
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