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A pendulum of length L = 8.40 m with a bob of mass m = 18.0 kg is pulled aside until the bob is a distance L = 6.72 m above its equilibrium position. The bob is then released. Find the speed of the bob as it passes the equilibrium position.
A 67 kg man weighs 637 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 19 percent of the body weight.
An unpolarized laser has an average power of .6 mW. At a distance of 10 m it forms a circle with a diameter of 2 mm. Intensity = 5.23 x 10^-4. Erms= .444 v/m. what is the speed of light in the polarizer
A 3.0 kg body oscillates in SHM on a spring that, when extended 3.6 mm from its equilibrium position, has an 8.9 N restoring force. What are the capacitance of an LC circuit with the same period if L is 7.6 H
Consider a spherical Gaussian surface and three charges:q1=1.76microC, q2= -2.50microC, and q3=3.69microC. Find the electric flux through the Gaussian surface
120-v rms signal at 60.0hz is applied across a 30.0mH inductor and a 100 resistor. what is the rms value of the voltage across the inductor
Parallel light from a distant object strikes the large mirror in the figure and is reflected by the small mirror that is 2.528 m from the large mirror, What is the radius of curvature of the smaller mirror
A rocket has an initial mass of 28,000 kg, of which 20 percent is the payload. It burns fuel at a rate of 185 kg/s and exhausts its gas at a relative speed of 1.8 km/s.
A car's starter draws 50A from the car's battery when starting up. If the start up time is 1.5s, how much electrons pass a location in the circuit during the time
An electric motor rotating a workshop grinding wheel at a rate of 93 rev/min is switched off. Assume the wheel has the constant negative angular acceleration of magnitude 2rad/s2.
A harmonic wave in a wire has amplitude 7.07 mm, wavelength 2.61 m, and frequency 254 Hz. What is the propagation speed of the wave
Human skin is most sensitive to ultraviolet light of approximate wavelength 300 nm. The threshold for sunburn occurs when 1 cm2 of skin absorbs about 1015 of these UV photons over an interval of several hours or less. How much energy is absorbed
A simple pendulum is used to measure g, using the relation T=2piesqrt(l/g), What is the standard deviation of the mean, barg, for the calculated value of g
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