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An object rotates about a fixed axis, and the angular position of a reference line on the object is given by ? = 0.60e8t, where ? is in radians and t is in seconds. Consider a point on the object that is 8.0 cm from the axis of rotation. At t = 0, what are the magnitudes of the point's
(a) tangential component of acceleration and
(b) radial component of acceleration?
A rocket of total mass 3180-kg is travelling in outer space with a velocity of 115 m/s toward the Sun.
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.
The rotor of a toy gyroscope consists of an annular cylinder attached to cylindrical shafts by spokes. The rotor is spun by pulling on a string wrapped around shaft.
Estimate the phase difference between the sounds received by your ears when you are facing 90° away from the direction of the source
A candle is placed 16.0 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, the image moves 7.5 cm farther away from the mirror. Find out the focal length of the convex mirror.
A 480g , 8.00-cm-diameter solid cylinder rolls across the floor at 1.50m/s. What is the can's kinetic energy
In the Bohr theory of the hydrogen atom, an electron moves with constant speed in a circular orbit about a proton, where the radius of the orbit is 0.53 x 10-10 m, Determine the electrostatic force exerted by the proton on the electron
A cube of ice is taken from the freezer at -8.7 C and placed in a 111 g aluminum calorimeter filled with 315 g of water at room temperature of 20.0 C, What was the mass of the ice cube
What is the initial (horizontal) velocity of the ball. An airplane needs to reach a velocity of 203 km/h to take off. On a 2000 m runway, what is the least acceleration necessary for the plane to take flight.
A capacitor with its plates separated by paper stores 5.0 of charge when it is connected to a particular battery. How much charge does that capacitor store
A physics demo launches a ball horizontally while dropping a second ball vertically at exactly the same time. Which ball hits the ground first? and why
What is the net upward force on an airplane wing of area 27.8 m2 if the speed of air flow is 242 m/s across the top of the wing
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