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The electric motor of a heat pump transfers energy as heat from the outdoors, which is at -6.1°C, to a room, which is at 20°C. If the heat pump were a Carnot heat pump (a Carnot engine working in reverse), how much energy would be transferred as heat to the room for each joule of electric energy consumed?
A 0.24-kg ball on a stick is whirled on a vertical circle at a constant speed. calculate the tension in the stick
A runner covers one lap of a circular track 40.0m in diameter in 63.5s, what was her average speed for that half-lap
If a ball is thrown upwards at 20 ft/sec, the height h after t seconds is given by h = -16t^2 + 20t. How many seconds does it take for the ball to reach its greatest height, and what is this height.
The measurement of the energy of a photon requires a timeinterval of 3.6 x 10-8 sec. What is the smallest uncertainty in the photon's energy
a spelunker is surveying a cave. she follows a passage 160m straight west then 290m in a direction 45 degree east of
A meter stick of weight W leans away from a wall. The 0 cm line is against the wall at the floor and it makes an angle of theta with the wall. It is kept from falling by a horizontal string connected to the 80 cm line. What is the tension (T) in the ..
You can turn the crank at a maximum rate of 3 turns per second, but hand crank is connected to the coil through a set of gears that makes the coil spin at a rate 6 times larger than the rate at which you turn the crank. What is the maximum emf you ca..
A parallel-plate capacitor is charged to a potential difference of 12 V. The area on each plate is 20 cm2 and the spacing between plates is 0.15 mm.
A 0.223 kg ball is thrown straight up from 1.81 m above the ground. Its initial vertical speed is 8.40 m/s. A short time later, it hits the ground. Calculate the total work done by the force of gravity during that time.
We want to support a thin hoop by a horizontal nail and havethe hoop make one complete small-angle oscillation each 2.0 s. What must the hoop's radius be
What other social and religious impacts is Fontanelle mentioning?
A constant voltage of5.00 V has been observed over a certain time interval across a 3.00H inductor. How long was this time interval
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