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A 7100 kilogram boxcar traveling at 12.0 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 4.5 m/s. Evaluate what is the mass of the second car?
A student sits on a rotating stool holdingtwo 5 kg objects. When his arms are extendedhorizontally, the objects are 0.9 m from the axis of rotation, Calculate the change in kinetic energy of the system
A ball of mass 0.45 kg is traveling with a velocity of 1.2 m/s north, 2.4 m/s east and 0.6 m/s up. What is the angular momentum of the ball with respect to the point at which the rope is attached to the post
Venus has a mass of 4.0869*10^24 kg and a radius of 6,052 km. Calculate the acceleration due to gravity on Venus
A Geiger counter registers a count rate of 8,000 counts per minute from a sample of a radioisotope. What is the half-life of the radioisotope
Two point charges are separated by d= 10 cm and have charges of q1= +2(mu)C and q2= -2 (mu)C, respectively, What is the magnitude of the electric force between the two charges
Two resistors, 48.8 and 60.5?, are connected in parallel. The current through the 60.5-? resistor is 3.72A, What is the total power supplied to the two resistors
A 50.0kg pole vaulter running at 10.0m/s vaults over the bar. Assume that the vaulter's horizontal component of velocity over the bar is 1.0 m/s and disregarding air resistance, how high was the jump.
goldilocks is visiting the three bears house and she notices three bowls of porridge arranged on the table. papa bears
A 0.76- air cart is attached to a spring and allowed to oscillate. If the displacement of the air cart from equilibrium is x= (10.0cm) cos [(2.00s^-1)t+ pi], Find the maximum force exerted on it by the spring
A solar collector is placed in direct sunlight where it absorbs energy at the rate of 880 J/s for each square meter of its surface. What equilibrium temperature does the collector reach
two blocks of masses 20 kg and 8 kg are connected together by a light string and rest on a frictionless level surface.
A proton is projected in the positive x direction into a region of uniform electric field = (-5.20E5) N/C at t = 0. The proton travels 6.20 cm as it comes to rest, Determine the initial speed of the proton
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