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An elevator is rising at a constant speed, subject only to the tension (T) and gravitational (W) forces exerted on it by the cable above and the Earth below. As it rises, which force (if either) has a greater magnitude, T or W? Explain.Consider this in the light of Newtons 2nd law (N2L). What is the elevators acceleration?
Unpolarized light of intensity I0 passes through six successive Polaroid sheets each of whose axis makes a 45? angle with the previous one
man hanging upside down is holding a partner who weighs 604 N. what force must the man apply to his partner in the straight-down position
A sinusoidal voltage %u0394v = (90 V) sin (170t) is applied to a series RLC circuit with L = 50 mH, C = 130 %u03BCF, and R = 44 %u03A9. What is the impedance of the circuit
A potter's wheel -- a thick stone disk of radius 0.500 m and mass 120 kg -- is freely rotating at 50.0 rev/min. The potter can stop the wheel in 6.00 s by pressing a wet rag against the rim and exerting a radially inward force of 63.0 N. Find the eff..
A converging lens of focal length 77.0 cm. is placed 52.0 cm. behind a diverging lens. What is the absolute value of the focal length (in centimeters) of the diverging lens
all the data for this problem come from a conservative dialect of vegraveneto a romance language spoken in northern
A submarine sends a sonar signal, which returns from another ship 2.250 s later. How far away is the other ship if the speed of sound in seawater is 1,530.0 m/s
A thin film of oil (n = 1.21) is located on smooth, wet pavement. What is the minimum thickness of the oil film
Sarge quickly approximates the rope to be a string with a very high spring constant. What is the speed of wave propagation on the rope
A 250 g block of wood hangs from a light string 0.78 m long. The block is shot with a bullet of mass 4.2 g, what was the velocity of the bullet just before it hit the block
Two concentric conducting spheres of radii a = 5 cm and b = 10 cm have a potential difference V = 100 V between them. What is the charge carried by each sphere
A rocket has a total mass of 1.00 x 105Kg and a burnout mass of 1.00 x 104Kg, including engines, shell, and payload. What thrust does the engine develop at lift off
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