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A football player with a mass of 87 kg and a speed of 2.1 m/s collides head-on with a player from the opposing team whose mass is 120 kg. Suppose the speed of the second player is 1.3 m/s . The players stick together. Find the speed of the players after the collision, assuming the speed of light is 3.2 m/s? Express your answer using two significant figures v=____m/s
What is angular velocity of the cockroach-disk system
A college student produces about 135 kcal of heat per hour on the average. What is the rate of energy production in watts
Which of the following must be true if we are to infer (calculate) a star's luminosity directly from the inverse square law for light.
You let a ball roll from rest from the top of a ramp sitting on a table. If the top of the ramp is 14 cm above the top of the table, how fast is it moving when it reaches the bottom
A 4900 kg lunar lander is in orbit 60 km above the surface of the moon. How much work must the thrusters do
After sliding down a snow-covered hill on an inner tube, Ashley is coasting across a level snowfield at a constant velocity of +2.8 m/s. How fast do the two of them slide across the snow together on the inner tube
Write down the expression that shows the pressure
A single-turn current loop, carrying a current of 5.67 A, is in the shape of a right triangle with sides 62.8, 114, and 130 cm. What is the magnitude of the net force on the loop
assume a bar 2 m long expands 0.6 cm when heated. By how much will a bar 100 m long of the same material expand when similarly heated.
The radioactive isotope has a half-life of 2.60 y and has a half-life of 87.0 days . They each emit positive β- particles or positrons. what will the count rate be at that time
A particle of mass m is attracted to a force center with force of magnitude k/r2. Use plane ploar coordinates and find Hamilton's equations of motion.
A gymnast of mass 55.0 hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value for the acceleration of gravity.
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