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Baseball scouts often use a radar gun to measure the speed of a pitch. One particular model of radar gun emits a microwave signal at a frequency of 10.525 GHz.
What will be the increase in frequency if these waves are reflected from a 60.0mi/h fastball headed straight toward the gun? (Note: 1 mi/h = 0.447 m/s )
The correct answer is 1880 Hz. I feel like I am doing something wrong because I keep getting 2008 Hz. Can you please show work when answering the question?
A rectangular block of ice 12 m on each side and 1.2m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917kg/m3.
A Carnot engine whose cold reservoir temperature is 1.0 C has a thermal efficiency of 40%. By how much should the temperature of the hot reservoir be increased to raise the efficiency to 60%?
A 56 kg astronaut floating at rest in space outside a space capsule throws his 0.50kg hammer such that it moves with the speed of 14.00 m/s relative to the capsule. What happens to the astronaut? What is the astronaut's speed.
An aircraft performs a maneuver called an aileron roll. During this maneuver, the plane turns like a screw as it maintains a straight flight path, which is the acceleration of the wing tip
If a metric ton is 1.000 x10^e3 kg, how many 74 kg people can safely occupy an elevator that can hold a maximum mass of accurately 1 metric ton.
A kayaker needs to paddle north across a 100m wide harbor. The tide is going out, creating a tidal current that flows east at 2 m/s. The kayaker can paddle with a speed of 3 m/s.
Three thin uniformly charged shells A, B and C, with radii R, 2R , 3R respectively are placed one inside the other, What is the electric potential at radius 2R
Find out (a) capacitance and (b) maximum voltage that can be applied to a Teflon-filled parallel- plate capacitor having a plate area of 175 cm2 and an insulation thickness of 0.040 mm.
A 1000kg truck is driving up a 10 degree slope. A 10g ornament hangs by a massless string from the rear-view mirror in truck.
A firefighter standing on a ladder 4.20 meters in the air is using a water hose to put out a fire. How much work is done per minute in lifting the water from the ground
A 47 kg person, standing 0.980 m from the axis, begins to run on the disk in a circular path and has a tangential speed of 3.10 m/s relative to the ground. Find resulting angular speed (in rad/s) of the disk.
A spider has a mass of 0.70-g and is hanging from rest on a 20-cm long thread of 0.0020-mm diameter of silk, If the string is whirled in a circle at a rate of 2 revolutions per second, what is the minimum and maximum time for vibrational information..
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