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a pitcher delivers a fast ball with a velocity of 43 m/s to the south. the batter hits the ball and gives it a velocity of 51 m/s to the north. what was the average acceleration of the ball during the 1.0 ms when it was in contact with the bat?
Ball A is fired straight upward, Ball B is fired straight down, and Ball C is fired horizontally. Rank, from largest to smallest, the speed of each ball at the instant (just before) it collides with the ground.
What is the intensity level in decibels for a sound with an intensity of 2.35×10-4 W/m2, What is the intensity for a sound with an intensity level of 79.9 dB
A particle known as a pion lives for a short time before breaking apart into other particles. According to this hypothetical person, how far does the laboratory move before the pion breaks apart
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
Two soccer players start from rest, 45 m apart. They run directly toward each other, both players accelerating. How much time passes before the players collide
A section of hollow pipe and a solid cylinder have the same radius and mass. Which has the most rotational kinetic energy
Estimate the force exerted on your fingertip if you place it at this point. Assume area of the fingertip to be 1.4cm^2
question1jims dog sparky runs 45.0 northeast to a tree then 70.0 west to a second tree and at last 25.0 south to a
resistance R, capacitance C, and inductance L are connected in series, what is the formula for impedence for this circuit
The 6.5 kg box has acceleration to the left of 3.50 m/s^2. There is an applied force of 50 N acting on the box. Determine the magnitude of the friction acting on the box
An airplane has a mass of 28,000 kg and takes off under the influence of a constant net force of 44,000 N
The star Alpha goes supernova. Ten years later and 80 ly away, as measured by astronomers in the galaxy, star Beta explodes. what is the time between the explosions
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