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A wheel of 40cm radius rotates on a stationary axle. It isuniformly speeded up from rest to a speed of 900 rpm in a time of20s. Find
(a) the constant angular acceleration of the wheel and
(b) the tangential acceleration of a point on its rim.
The wave function for a wave on a taut string is y(x,t) = 0.355 sin [(9)(pi)(t) - (3)(pi)(x) + (pi/4)], where x and y are in meters and t is in seconds. What is the energy contained in each cycle of the wave
A sphere of radius 10.0 cm floats in equilibrium partially submerged in water with its lowest point 5.00 cm below the water's surface. What is the buoyant force acting on the sphere
White light, which is a mix of all visible wavelengths in the range of 400 nm to 700 nm, What is the thickness of the plate if the next wavelength for which there is constructive interference is 540.6nm
Two very large charged parallel metal plates are 10.0cm apart, How much work has the electric field done on this proton by the time it reaches the positive plate
The top of Mt. Everest is 8750 m above sea level. Assume that sea level is at an average Earth radius of 6.38×10^6 m. What is the magnitude of gravitational acceleration at the top of Mt. Everest? Mass of the Earth is 5.97×10^24 kg.
A jet flying at 109 m/s banks to make a horizontal circular turn.The radius of the turn is 3810 m, and the mass of the jet is2.33*105 kg. Calculate the magnitude of the necessary lifting force. L= ?
One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. estimate the diameter of the pinhole
two equal masses are attached to the ends of a spring whose force constant is k. With what frequency do they oscillate
To a person swimming 0.790m beneath the surface of the water in a swimming pool, what is the actual height of the diving board above the surface of the water
Wool is rubbed against a plastic ruler. how many electrons have been transferred to the ruler
A bat flying in a cave emits the sound pulse and receives its echo in 3.5 s. How far away is the cave wall.
a 8150 kg sailboat is moving through the waters of the atlantic. initially the boat is traveling at 30 mph 17 degrees
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