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A wheel is spinning at 53 rad/s. It undergoes an angular acceleration of 44 rad/s 2 until it reaches an angular velocity of 381 rad/s.
1. Decide how long it took to spin up.
2. Decide how many revolutions it made while spinning up.
A film of oil lies on wet pavement. The refractive index of the oil exceeds that of the water. what is the longest visible wavelength (in vacuum) for which the film will appear bright due to constructive interference
a person scuffing her fee on a dry day accumulates a net charge of -42 uc. how many excess electrons does she get and
Air is confined at atmospheric pressure (101.3kPa) in a cylinder whole volume is 0.22 m^3. When 8.0 kcal of heat is added, the volume increases at constant pressure to 0.35m^3. Calculate the increase in internal energy of the air.
an object moves with constant acceleration 4.50 ms2 and over a time interval reaches a final velocity of 11.2 ms.a if
a 25 gram bullet moving at 550 ms strikes and imbeds itself in a 3.5-kg wooden block that is at rest on a level
A 7 kg ball has a velocity of 16 m/s. How much work would be required to stop the ball
A planet orbits a star once every 3.44 multiply.gif 107 s in a nearly circular orbit of radius 1.46 multiply.gif 1011 m. determine the tangential speed of the planet
Chuck Norris's razor blade has an output force of 2500 lbs is used to shear his burley face. The shaving blade has the 0.35 inch thick blade with a 55 degree slope.
How does knowing the time constant of an RL or RC circuit help us decide the width of a practical pulse input that is short enough to provide a good approximation of an impulse? Illustrate your answer with a numerical example.
A startled armadillo leaps upward rising 0.550 m in the first 0.203 is. (a) What is its initial speed as it leaves the ground? m/s (b) What is its speed at the height of 0.550 m? m/s (c) How much higher does it go?
An electron is released from rest at the negative plate of a parallel plate capacitor and accelerates to the positive plate, What is the kinetic energy of the electron just as it reaches the positive plate
a merry go round (a disk I=1/2MR^2, M=500 kg, R = 1.5m) roatates at 2m/s. What is the new rotation rate for the merry go round with the child
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