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A guitar string with mass density μ = 2.1 × 10-4kg/m is L = 1.07 m long on the guitar. The string is tuned by adjusting the tension to T = 104.7 N. With what speed do waves on the string travel?
A man of mass 77.0 kg walks down the aisle of an airplane at a speed of 1.70 m/s in the forward direction while the plane moves at a speed of 315 m/s relative to the earth. Find the man's kinetic energy relative to the earth
Assume we have a gas in thermal equilibrium at temperature T. Each molecule of the gas has mass m. what is the ratio of the number of molecules at the Earth's surface to the number at height h (with potential energy mgh)?
The rms current in a copy machine is 7.50 A, and the resistance of the machine is 14.4 ?. What is the peak power delivered to the machine?
Static equilibrium Indicate the direction of positive rotation and the axis of rotation in this problem. What is the tension in the string? What is the full vector description of the force exerted by the hinge on the bar?
A car tire is 64.0cm in diameter. The car is traveling at a speed of 16.0m/s. What is the tire's rotation frequency
Consider the circuit shown in the figure to the right. (Assume R1 = 11.0 ohm, R2 = 2.20 ohm, and V = 7.00 V.) Find the equivalent resistance of the circuit.
A car with a mass of 1000 kg is driving over a hill at a constant speed of 60 m/s. What is the weight (in N) of the car at the top of the hill
A fuel pump sends gasoline from a car's fuel tank to the engine at a rate of 5.89 10-2 kg/s. What is the speed at which the gasoline moves
A steel cable with total length 58 m and mass 110 kg is connected to two poles. The tension in the cable is 2,116 N, and the wind makes the cable vibrate with a frequency of 2 Hz. Compute the wavelength of the resulting wave on the cable.
A capacitor is connected across the terminals of an ac generator that has a frenquency of 430 Hz and supplies a voltage of 28 V. Find the capacitance of the second capacitor
Point charges of +1nc, +3nc and -3nc are located at each of three corners of an equilateral triangle with side length of 30cm. Find the net electrostatic fornce exerted on the +1nc charge.
a block weighing 100lbs rests on a rough level plane. the coefficient of friction is between the block and the plane is
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