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The heating coil of a hot water heater has a resistance of 20 Watt and operates at 210 Volt. Determine how long a time is required to raise the temperature of 200 kilogram of water from 15°C to 80°C? (The specific heat for water = 103 cal/kg°C and 1.0 cal = 4.186 J).
A spherical capacitor contains a charge of 3.20 nC when connected to a potential difference of 220 V, Calculate the radius of the inner sphere
An old wooden telephone pole with a single cross member was blown off center during a recent storm. To temporarily stabilize the telephone pole, a repair crew has attached a cable from the end of the cross member
A 0.117 kg meterstick is supported at its 37.7 cm mark by a string attached to the ceil- ing. A 0.624 kg mass hangs vertically from the 4.04 cm mark. A mass is attached somewhere on the meterstick to keep it horizontal and in both rotational and t..
A mass m2 = 1.8 kg, on a 39.4° incline, is connected to a mass m1 = 5.2 kg, on a horizontal surface. find the magnitude of the tension in the connecting cord
Waves on a 10 meter rope travel at 19 m/s. You shake the rope back and forth until you get a standing wave with a single antinode. What is the wavelength and frequency of each standing wave
An object is hung from a spring balance attached to the ceiling of an elevator cab. Determine the reading when the elevator is moving upward with a constant speed of 8.5 m/s
a system executes a power cycle while receiving 800 kj by heat transfer at a tem-perature of 1600 k and discharging 120
A f = 5 cm thin lens is to the left of a concave spherical mirror with a radius of curvature of magnitude 8 cm. The lens and the mirror are 20 cm apart, and an object is placed 8 cm to the left of the lens. Determine the position, orientation, and ma..
A cooling fan is turned off when it is running at 880rev/min . It turns 1000 revolutions before it comes to a stop. What was the fan's angular acceleration, assumed constant
The queen has set up a pendulum in the door to her house by tying a string 1.5 meter length to a ball of mass 0.9 kilogram and attaching it to the top of the door. Compute how high does the ball now rise on the side with the rod
An airplane is flying with a velocity of 90 at an angle of 22 above the horizontal. When the plane is a distance 122 directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
Your car's fan belt turns a pulley at 3.00 rev/s . When you step on the gas for 1.25s , the rate increases steadily to 5.60 rev/s. Through what angle did the pulley turn while accelerating
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