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A child is sitting on the outer edge of a merry-go-round that is 18 m in diameter. If the merry-go-round makes 8.4 rev/min, what is the velocity of the child in m/s?
You are part of a searchand- rescue mission that has been called out to look for a lost explorer. What minimum speed must the rocket have just before impact in order to save the explorer%u2019s life
The mass density of an object is 20.0 g/cc, and its mass is determined to be 104 g. What is the volume of the object
Two radio antennas are separated by 1.20m. Both broadcast identical 750 MHz waves. If you walk around the antennas in a circle of radius 20m, how many maxima will you detect.
If the air in the tube is replaced with a different gas, the frequency of the fundamental standing wave changes to 60·Hz. What is the speed of sound in this new gas
A 300g ball on a 70cm -long string is swung in a vertical circle about a point 200 cm above the floor, What was the tension in the string an instant before it broke
An unstretched spring has a length of 0.30 m. while the spring is stretched to a total length of 0.60 m, it supports traveling waves moving at 4.5 m/s. How fast would waves travel on this spring if it is stretched to 0.90 m.
A uniform cylinder whose mass is 50 kg and radius is 0.20 m is mounted so that it turns without friction on its axis, which is fixed. What is the magnitude of the torque acting on the cylinder
A pair of flat mirrors meet to form a right angle. A beam of light is incident on one of them at a point 11.5 cm from their point of intersection, find what is the angle of incidence at the first mirror
A 500g glider on an air track is at rest, and is attached to a spring with a spring constant of 10 N/m. What is the amplitude and period of the resulting oscillations
A 230-N child is in a swing that is attached to ropes 1.90m long. Find out the gravitational potential energy associated with child relative to her lowest position at the following times.
A single chain supports a pulley whose weight is 40 N. Two identical 80-N weights are then connected with a cord that passes over the pulley
When a 0.213-kg mass is attached to a vertical spring it causes the spring to stretch a distance d. Find the stretch distance, d
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