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A simple pendulum uses a steel wire as the "string." The length of this wire is 1.5 m at room temperature. If the temperature is increased by 10°C, the length of the wire increases by 0.19 mm. What is the change in the period of the pendulum?
Solar Radiation is incident on the surface of the Earth at an average of 1000 W/m^2. This is measured on a surface which is perpendicular to the incoming light
A conducting sphere of radius a is surrounded by a concentric conducting spherical shell of radius r. Find the electrostatic field energy contained in the region
A light beam is incident on a piece of sodium chloride (n = 1.544) at the Brewster's angle. Find the angle of refraction for the transmitted ray
a police car parked by the side of a straight road is passed by a speeding car going at a constant speed of 30 ms.
Two cars, starting from rest at x=0 at t=0, are racing. Car A and B both accelerate in a straight line at a constant acceleration (a=4m/s2) for 10s. After 20s, Car B crosses the finish line. How far is the finish line from the starting point of the..
what force would be needed to pull the same wooden.
A resistor with R = 2.4 k? is connected to an AC generator that operates at 60 Hz with an amplitude of 41 V. Find the average power dissipated in the resistor
There are approximately 109 million TVs in the United States. Each uses, on average, how much money is spent every day in keeping the TVs turned on
A person is parachute jumping. During the time betweenwhen she leaps out of the plane and when she opens her chute, heraltitude is given by the equationy = (10000 m) - (50 m/s) [t + (5.0 s)e^-t/5.0].Find her velocity at t = 7.0 s. (This can be done o..
A uniform .20-kN board of length L has two objects hanging from it : 300N at exactly L/3 from one end, What torques are being exerted on the board
A student has built a 20-cm-long pinhole camera for a science fair project. How far should she stand from the Washington Monument
A horizontal rod .200 meter long carries a current through a uniform horizontal magnetic field of magnitude .067 T that point's perpendiculars to the rod. calculate the current flowing through the rod
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