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In an experiment to determine the speed of sound in air a student bangs two blocks of wood together when standing 125 meters away from a high wall the student hears the echo from the wall within 1 second of banging the blocks together when he bangs the blocks repeatedly at a certain regular rate he can no longer hear the echoes explain why he cannot hear the echoes when he bangs the blocks at a particular rate?
How far from the dog would the suitcase land? You can ignore air resistance.
When a firecracker is placed inside a bowling ball, the momentum before the explosion is equal to the momentum after the explosion because
A 53 kg woman and a 80 kg man stand 13 m apart on frictionless ice. If they hold on to two ends of a rope, and the man pulls on the rope so that he moves 3m, how far from the woman will he be now.
A football is thrown horizontally with an initial velocity of (14.8 m/s)x. Ignoring air resistance, the average acceleration of the football over any period of time is (-9.81 m/s2)y. Calculate the magnitude of the velocity at this time
The front spring of a car's suspension system has a spring constant of 2.32 x 106 N/m and supports a mass of 183 kg. The wheel has a radius of 0.433 m. The car is traveling on a bumpy road, on which the distance between the bumps is equal to the c..
A parallel-plate capacitor is constructed using a dielectric material whose dielectric constant is 2.90, Find the minimum area of the capacitor plates
An ideal heat-engine is to be used in an environment where the ambient temperature is 22.50 °C. What must be the minimum temperature of the hot heat reservoir in order to reach at least 46.40 percent efficiency with heat-engine? (Give the answer i..
Given two parallel plate capacitors 1 and 2. They both have a plate-charge Q and plate area A. Determine the ratio of the polarized charge q1/q2
A 0.120-kg, 50.0-cm-long uniform bar has a small 0.055-kg mass glued to its left end and a small 0.110-kg mass glued to the other end. How far from the left end should the fulcrum be placed
A spring is mounted from the ceiling. As a mass is attached, the spring stretches 1.04 m. What will be the frequency of the resulting oscillation
A snowmobile climbs a hill at 15 mi/hr. The hill has a grade of 1 ft rise for every 40 ft. How fast will the snowmobile move downhill
A billiard ball moving at 6.00 m/s strikes a stationary ball of the same mass. find the struck ball's velocity after the collision
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