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An object of mass m moves to the right with a speed v. It collides head-on with an object of mass 3m moving with speed v/3 in the opposite direction. If the two objects stick together, what is the speed of the combined object, of mass 4m, after the collision?
A 2250 kg satellite used in a cellular telephone network is in a circular orbit at a height of 510 km abouve the surface of the earth. what is the gravitational force on the satellite
The 14C atom undergoes an explosion and decays into a nucleus, an electron, and a neutrino. From this determine the speed of the recoiling nucleus
Two cars travel in the same direction along a straight highway, one at a constant speed of 55 mi/h and the other at 70 mi/h. How far must the faster car travel before it has a 15-min lead on the slower car
A rifle with a weight of 40 N fires a 4.5-g bullet with a speed of 230 m/s. Find the recoil speed of the rifle
q1. a worker stands still on a roof sloped at an angle of 40deg above the horizontal. he is prevented from slipping by
Suppose that you have two identical capacitors and a single resistor. If you make an RC circuit with one capacitor, What is the time constant for this circuit
What is the frequency of string that was tightened.How high does it rise above the ground.
A 2000kg car traveling at a speed of 12m/s skids to a halt on wet concrete where ?k = 0.50. How long are the skid marks
A tennis ball is shot out of a tennis practice machine at an angle of 18 upwards of the horizontal, at a speed of 20 m sec??1, from a height of 0.5 metre. at what height above ground would the ball be struck
An electric trimmer blade has rotational inertia 2.00×10?4kg?m2. How much work was done to accelerate the blade
Household wiring composed of aluminum wire with cross-section area 3.1 x10?6 m2 carries a current of 2.5 A. At what speed are the electrons traveling in this power line
A viscous fluid is flowing through two horizontal pipes. They have the same length, although the radius of one pipe is three times as large as the other. what is the volume flow rate QB in the wider pipe
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