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Two identical point charges are fixed to diagonally oppositecorners of a square that is 2.8 m on aside. Each charge is +3.5 µC. How much work is done by the electricforce as one of the charges moves to an empty corner?
An elephant's legs have a reasonably uniform cross section from top to bottom, and they are quite long, An elephant has legs that stretch 2.3 m from its shoulders to the ground. How much time is required for one leg to swing forward after completin..
A stream of water strikes a stationary turbine blade horizontally, as the drawing illustrates. Find the magnitude of the average force exerted on the water by the blade
A 2.10 kg mass attached to a spring oscillates with a period of 0.375 s and an amplitude of 20.5 cm. Find the total mechanical energy of the system
A rectangular block of ice 7.00 m on each side and 1.80 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. How high does the top of the ice block float above the water level.
A 140 kg piano is being lifted at a steady speed from ground level straight up to an apartment 16.0 m above the ground. The crane that is doing the lifting produces a steady power of 400W. Explain how much time does it take to lift the piano?
A solid sphere is released from height h from the top of an incline making an angle ? with the horizontal. Calculate the speed of the sphere when it reaches the bottom of the incline in the case that it rolls without slipping
When a human hair is held in front of a laser, a diffraction pattern is formed 1.50 m away from the hair. The first dark fringes on either side of the bright spot are 5.22 cm apart. What is the thickness of the hair?
The resonant frequency of an RCL circuit is 1.5 kHz, and the value of the inductance is 6.4 mH. What is the resonant frequency
A 480HZ sound wave in 20 centigrade air propagates into the water of a swimming pool. Assume that the wave's speed in the water is 1480m/s. What is the wave's frequency in the water? What is the wave's wavelength in the water?
A 0.159 kg toy is undergoing SHM on the end of a horizontal spring with force constant 310 N/m. Find the total energy of the object at any point in its motion
In San Francisco a very simple technique is used to turn around a cable car when it reaches the end of its route. what is the magnitude of the net torque applied to the car
The function y(x, t) = (25.0 cm) cos(?x - 26?t), with x in meters and t in seconds, describes a wave on a taut string. What is the transverse speed for a point on the string at an instant
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