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A Carnot freezer that runs on electricity removes heat from the freezer compartment, which is at -10.0 °C and expels it into the room at 25.0 °C. You put an ice-cube tray containing 390 g of water at 16.0 °C into the freezer.
a-What is the coefficient of performance of this freezer?
b-How much energy is needed to freeze this water?
c-How much electrical energy must be supplied to the freezer to freeze the water?
d-How much heat does the freezer expel into the room while freezing the ice?
The surface charge density on an infinite sheet is -2.0 x 10-6 coulomb. How far does the particle travel before reaching its truning point
An 80.0 kg person carries a 25 N package up aflight of stairs. The vertical height of the stairs is 10.0 m. How much total work did the person do on herself and the package
The quartz crystal in a digital watch has a frequency of 32.8 kHz. What is its period of oscillation?
A pendulum, consisting of a ball of mass m on a light string of length 1.00 m, is swung back to a 45° angle and released from rest. What is the block's speed after the collision
A system consists of a ball of mass M2 and a uniform rod of mass M1 and length d. Derive an expression for the angular momentum of the rod about point P before the collision
Calculate the linear momentum for each of the following cases. (a) A proton with mass 1.67 ? 10-27 kg moving with a velocity of 4.48 ? 106 m/s straight up. d) Earth (m = 5.98 ? 1024 kg) moving in its orbit with a velocity equal to 2.98 ? 104 m/s f..
include a free body diagram. Be sure to label all forces with their agents and size. 1. A 5.0kg cat running along suddenly braces his furry feet on the slippery floot in order to stop.
Two pieces of steel wire with identical cross sections have lengths of L and 4L.Each of the wires is fixed at both ends and stretched so that the tension in the longer wire is four times greater than that in the shorter wire. If the fundamental frequ..
Neutrons (RBE = 3.4) and %u03B1 particles have the same biologically equivalent dose. What is the RBE for the %u03B1 particles
rod of length 56.0 cm and mass 2.30 kg is suspended by two strings which are 40.0 cm long, one at each end of the rod. Find the magnitude of the initial acceleration of the end B
A room has dimensions 2.98 m (height) × 4.59 m × 6.03 m. A fly starting at one corner flies around, ending up at the diagonally opposite corner. What is the magnitude of its displacement
A spring is compressed by .02 m ad launches a block up an incline (ignore friction). what is the maximum distance will it travel
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