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A series ac circuit contains a 250-ohm resistor, a 15-mH inductor,a 3.5uF capacitor, and an ac power source of voltage amplitude 45 voperating at an angular frequency of 360 rad/s, (a) what is the power factor of this circuit? (b) find the average power deliveredto the entire circuit (c) what is the average power delivered tothe resistor, to the capacitor, and to the inductor?
A 3000 kg statue is placed on top of a cylindrical concrete (Y = 2.30 1010 N/m2) stand. By how much does the statue compress the stand
The intensity of light from a lightbulb is 12 W/m2 at a distance of 0.45 m from the bulb. What is the intensity across the room at a distance of 2.5 m?
Consider the Earth and a cloud layer 900 m above the planet to be the plates of a parallel-plate capacitor. (a) If the cloud layer has an area of 1.0 km2 = 1000000 m2, what is the capacitance?
A nurse applies a force of 4.30 Newton to the piston of a syringe. The piston has an area of 5.47 x 10-5 m2. Find the pressure increase in the fluid within the syringe
A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, What was the bear's average speed
What is the current in the element of an electric clothes dryer with a resistance of 8.2? when it is connected to 240 V
a spring is hung from the ceiling. a 0.45kg block is then attached to the free end of the spring. find the angular frequency of the block's vibrations
A flat (unbanked) curve on a highway has a radius of240 {\rm m}. A car rounds the curve at aspeed of 20.0 {\rm m}/{\rm s}. What is the minimum coefficient of frictionthat will prevent sliding?
A child in a boat throws a 5.80-kg package out horizontally with a speed of 10.0 m/s. The mass of the child is 23.0kg and the mass of the boat is 35.0kg. Compute the velocity of the boat immediately after, assuming it was initially at rest.
an automobile and train move together along parallel paths at 18.4 ms.the automobile then undergoes a uniform
A 255 g oscillator has a speed of 93.0 cm/s when its displacement is 3.90 cm and 74.5 cm/s when its displacement is 6.00 cm
fred wants to figure out how much extra it cost him to heat his house at 75.00 f so he does an experiment. he picks a
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