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What is the smallest number of whole logs (? = 725 kg/m3, radius = 0.0917 m, length = 3.10 m) that can be used to build a raft that will carry four people, each of whom has a mass of 66.0 kg?
A 1200 kg car rounds a corner of radius r = 45m. If the coefficient of static friction between the tires, what is the greatest speed the car can have in the corner without skidding
A string is58.0cm long and has a mass of 3.00 g. A wave travels at5.25m/s along this string. A second string has the same length, butone-fourththe mass of the first. If the two strings are under the same tension, what is the speed of a wave along ..
A 340kg wooden raft floats on a lake. When a 65kg man stands on the raft, it sinks 3.0cm deeper into the water. When he steps off, What is the total energy of vibration
A uniform board is leaning against a smooth vertical wall. The board is at an angle (theta) above the horizontal ground. Find the smallest value for the angle (theta), such that the lower end of the board does not slide along the ground.
A man stands on a platform that is rotating (without friction) with an angular speed of 1.0 rev/s; his arms are outstretched, What is the resulting angular speed of the platform
A light wave has a 660nm wavelength in air. Its wavelength in a transparent solid is 440nm. What is the speed of light in this solid
A copper wire has a square cross section 2.7 on a side. The wire is 3.8 long and carries a current of 4.0 . The density of free electrons is 8.5*10^28 m^-3.
A certain type of laser emits light that has a frequency of 5.4 x10^14 Hz. The light, so, occurs as a series of short pulses, each lasting for a time of 2.7 x10-11 s.
A drug prepared for a patient is tagged with 9943Tc which has a half-life of 6.05 h. What is its activity at the time it is injected
A child with a mass of 55 kg is riding on a merry-go-round. If the child has a speed of 3 m/s, what is the child's angular momentum
You decide to travel by car for your holiday visits this year. You leave early in the morning to avoid congestion on the roads. How far did you travel on this trip
By measuring the spectrum of wavelengths of light from our sun, we know that its surface temperature is 5760 K . By measuring the rate at which we receive its energy on earth, we know that it is radiating a total of 3.93×1026 J/s and behaves nearl..
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