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A 0.144 kg baseball is moving towards home plate with a speed of 43.0 m/s when it is bunted. The bat exerts an average force of 6.50 x 10^3 N on the ball for 1.30 ms. The average force is directed towards the pitcher, which we take to be the positive x direction. What is the final speed of the ball?
A system has a heat source supplying heat at a rate of 187 W and is doing work at a rate of 130.899998 W. At what rate is the internal energy of the system changing.
an old lady carries a 4kg potted plant to the top of a 100m tall building. what is the kinetic energy of the plant when it hits the ground
A 0.180 kg baseball, travelling 32.0 m/s, strikes catcher's mitt that recoils 13.0 cm in bringing the ball to rest. What was an average force (in newtons) applied by the ball to the mitt.
The meteoroid that creates a meteor has a typical mass of about 1 g (and burns up about 100 km above the Earth's surface). Estimate the amount of mass of meteoroids that enters the Earth's atmosphere per year
A wheel has a rotational moment of inertia I=150. It is accelerated by a constant torque from rest to a final angular velocity of 1.0. what is the value of the torque applied
During a physics experiment, helium gas is cooled to a temperature of 10.0K at a pressure of 9.00×10?2atm. What is the avergage energy per atom
a 46 v battery is connected in series with a resistance of 5.7 o and an inductance of 3.2 h. find the energy stored
Only two forces act on a 3.0-kg mass. One of the forces is 9.0 N east, and the other is 8.0 N in the direction of 62° north of west. What is the magnitude of the acceleration of the mass
A circular coil of wire with 70.0 Loops and a radius of 0.250 m is placed in a magnetic field of 10.0 T and oriented so that the coil is perpendicular to the field. Find the maximum power developed in the coil
A force applied to an object of mass m1 produces an acceleration of 3.00 m/s2. find its acceleration under the action of the force
A piano emits sound waves with frequencies that range from a low of about 28 Hz to a high of about 4,200 Hz. The speed of sound in air is approximately 343 m/s. find the longest wavelength of sound produced by a piano
A spherical bowling ball with mass m = 3.2 kg and radius R = 0.107 m is thrown down the lane with an initial speed of v = 8.7 m/s. What is the magnitude of the final velocity
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