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A circuit that consists of a capacitor in series with a 50 ohm resistor draws 4 A from a 250-V(rms), 200 Hz power source.
a) how much power is dissipated?
b) what is the power factor?
c) what inductance should be connected in series in the circuit to increase the power factor to 100%?
d) what would the current be?
e) how much power would the circuit dissipate?
A sledge loaded with bricks has a total mass of 17.1 kg and is pulled at constant speed by a rope inclined at 19.9° above the horizontal. how much work is the roping doing on the sledge
A 5 kg block, measuring 10 cm per side, is held 50% submerged in water by a Helium balloon. If the density of Air is 1.18g/L, what is the diameter of the balloon
A 1,576-kg car is moving down a road with a slope (grade) of 11% while slowing down at a rate of 3.6 m/s^2. find direction and magnitude of the frictional force
The box of a well-known breakfast cereal states that one ounce of the cereal contains 99 Calories. what is the heaviest barbell that could be lifted a distance of 1.6 m
How various revolutions per minute would a 21 -diameter Ferris wheel need to make for the passengers to feel "weightless" at the topmost point.
The weight of the block on the table is 484 N and that of the hanging block is 165 N. Ignore all frictional effects, and assuming the pulley to be massless. Find the acceleration of the two blocks
A woman on a bridge 104 m high sees a raft floating at a constant speed on the river below, She drops a stone from rest in an attempt to hit the raft, Find the speed of the raft
A 70-? electrical appliance and a 110-? electrical appliance are plugged into the outlets of a house. By what factor will the power used change if an additional 140-? electrical device is plugged in?
a popgun uses an ideal spring for which k=2000N/m. how high can the gun shoot a 5.0gram projectile
A 9.5 gram bullet hits a 5.4 kg block in collision as shown in the figure such that the block is free to rotate as a pendulum. what would be the final height of the block
A hydraulic lift is used to jack a 970 kg car 12 cm off the floor. The diameter of the output piston is 18 cm, and the input force is 250 N. What is the area of the input piston
A spring with spring constant 13 N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 8.5cm and free. The ball makes 26 oscillations in 18 s seconds.
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