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A girl with a mass of 40 kg is swinging from a rope with a length of 3.2 m. What is the frequency of her swinging?
A conducting rectangular loop of mass M, resistance R, and dimensions w by l falls from rest into a magnetic field. All through the time interval before the top edge of the loop reaches the field, the loop approaches a terminal speed vT.
What is the acceleration of a rising hot-air balloon if the ratio of the air density outside the balloon to that inside is 1.37?
A small object with mass 0.200 kg moves with constant speed in a vertical circle of radius 0.500 m. What is the translational speed of the object
A car wheel in diameter of 30 inches has a linear velocity of 30 mph. The car accelerates for 10 seconds. What is the angular displacement of the car wheel during the 10 seconds of acceleration
Multiple-Concept Example 1 discusses the concepts that are relevant to this problem. obtain the rise in its temperature
A transformer is to be used to provide power for a computer disk drive that needs 5.8 V (rms) instead of the 120 V (rms) from the wall outlet. determine the current in the primary
A spherical object has an outside diameter of 50.0cm. Its outer shell is composed of aluminum and is 0.800cm thick. Determine the object's average density
two point charges each have a value of 30.0 mC, compute the electric field midway between the two charges
A doubly charged ion is accelerated to an energy of 35.0 keV by the electric field between two parallel conducting plates separated by 2.20 cm
In a darkened room we place a lighted tungsten bulb in a box that has one end covered with tinfoil. If we make a pinhole in the tinfoil, an image of filament appears on a screen facing the tinfoil.
A pulse from a ruby laser (lambda = 694.3 nm) has an average power of 20 MW and lasts 2.3 ns. What is the total energy of the pulse
A typical adult ear has a surface area of 1.45 × 10-3 m2. The sound intensity during a normal conversation is about 2.49 × 10-6 W/m2 at the listener's ear. How much power is intercepted by the ear
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