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A student throws a baseball at a large gong 76 m away and hears the sound of the gong 1.95758 s later. The speed of sound in air is 330 m/s. What was the average speed of the base- ball on its way to the gong? (For simplicity, assume its trajectory to be a straight line.) Answer in units of m/s
You found the distance that you will cover at the same time as braking. You can utilize the expected amount of time for braking to check your answer for distance.
In a simplified model of a hydrogen atom, the electron moves around the proton nucleus in a circular orbit of radius 0.53 × 10^?10 m, Determine the period of the circular motion
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1020 Hz. The bird-watcher, however, hears a frequency of 1060 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
Object A with mass 9*mo is moving in positive x direction at speed of 0.8c. Object B with mass 1.2*mo is moving toward negative x direction with speed of 0.6c, Find the kinetic energy of the system before and after the collision
A soccer player kicks the ball toward a goal that is 16.0 m in front of him, Find the speed of the ball when the goalie catches it in front of the net
why does d account for the reduction of the distance from 8.5 km to a 0 distance. Is this not a reflection of displacement rather than just distance
A certain freely falling object requires 1.56 s to travel the last 37.0 m before it hits the ground. From what height above the ground did it fall.
find the lowest frequency that make constructive interference.
A railroad car of mass 3.3 104 kg moving at 3.50 m/s collides and couples with two coupled railroad cars, How much kinetic energy is lost in the collision
a 19.2 kg sled is being pulled across a horizontal surface at a constant velocity. determine the coefficient of kinetic friction
An evacuated spherical diving bell containing a camera is in the ocean at a depth of 143m. It has a flat, transparent, Find the magnitude of the total force on the port
A proton is initially at rest at a point where the potential is 459 V. Sometime later the proton is at a point where the potential is 218 V. If no force other than an electrostatic force acts on the proton, what is its final kinetic energy.
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