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A "swing" ride at a carnival consists of chairs that are swung in a circle by 12.0 m cables attached to a vertical rotating pole, as the drawing shows. (? = 69.0°) Suppose the total mass of a chair and its occupant is 228 kg. Find the speed of the chair.
A lamp (R = 155 ), an electric heater (R = 27 ), and a fan (R = 51 ) are connected in parallel across a 118 V line. What power is expended in the heater
The position of a particle moving along the x axis is given by x = (32 + 40t - 8.0t2) m, where t is in s. What is the average velocity during the time interval t = 1.0 s to 3.0 s?
A car starts from rest and accelerates at a constant rate of 3.00 m/s^2 until it is moving at 18.0 m/s. The car then decreases its acceleration to 0.500 m/s^2 and continues moving for an additional 250 m. Find the total time taken.
A section of copper transmission line carries a steady current of 265A and has resistance 0.82 ohem, Ignoring the energy needed to refrigerate the superconductor, how much energy will be saved in one year
A 25kg solid door is 220cm tall, 91cm wide. What is the door's moment of inertia for rotation about a vertical axis inside the door, 15cm from one edge.
An electron is at the origin. (a) Calculate the electric potential VA at point A, x = 0.160 cm. V (b) Calculate the electric potential VB at point B, x = 0.170 cm. V What is the potential difference VB - VA? V
suppose that all the energy goes into the arrow, with what speed does the arrow leave the bow.
As the crate is sliding down the ramp, you find out the washer is at rest with respect to the crate when the string makes an angle of 73 with the top of the crate.
Light of wavelength 587.5 nm illuminates a slit of width 0.75 mm. Calculate the width of the central maximum
A ball with a vertically downwards initial velocity v(0) = 3 m/s collides with a fixed inclined surface. find the velocity of the ball after it rebounds
A 0.15-kg of aluminum contains 0.2 kg of water. Initially, the water and the cup have a com- mon temperature of 18 0C, find the specific heat capacity of the unknown material
Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this, find the average force on the truck driver from the seatbelt
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