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A 0.283-m-thick sheet of ice covers a lake. The air temperature at the ice surface is -17.7 °C. In 3.10 minutes, the ice thickens by a small amount. Assume that no heat flows from the ground below into the water and that the added ice is very thin compared to 0.283 m. Calculate the number of millimeters by which the ice thickens. Do not enter unit.
In each cycle of its operation, a refrigerator removes 17J of heat from the inside of the refrigerator, How much work per cycle is required to operate this refrigerator
In fact, it is found that if the heavier mass is given a downward speed of 0.21 m/s, it comes to rest in 6.7 s. What is the average frictional torque acting on the pulley
Two ice skaters, Daniel (mass 60.0kg) and Rebecca (mass 45.0kg), are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, find the magnitude of Daniel's velocity after the collision
A baseball (mass = 140 g) is pitched so that it crosses home plate with a speed of 92.0 mph at an angle of 18.4degree below the horizontal. find the impulse delivered to the ball by the bat
A window washer pulls herself upward using the bucket-pulley apparatus shown in Fig. 4-42. The mass of the person plus the bucket is 60 kg. (a) How hard must she pull downward to raise herself slowly at constant speed? If she increases this force by ..
A 120cm3 box contains helium at a pressure of 1.50atm and a temperature of 80.0?C. What is the final pressure in each box
A Major League fastball is thrown at 92.9 mph and with a spin rate of 108 rpm. how many full turns does the ball make between release and catch
Point charges q1=? 4.10nC and q2=+ 4.10nC are separated by distance 3.20mm , forming an electric dipole, What is the direction of the dipole moment
A 2.0 kg ball moving with a speed of 3.0 m/s hits, elastically, an identical stationary ball as shown. If the first ball moves away with angle 30° to the original path
An ideal gas at STP, originally occupying a volume of 0.115 m^3, expands isothermally until its pressure falls to 0.85 atm. How much heat flows into the gas
In a double-slit interference experiment, the wavelength is ? = 622 nm, What is the linear distance between the 6th order maximum and the 2nd order maximum on the screen
Using focused laser light, optical tweezers can apply a force of about 14pN to a 1.1\mu m diameter polystyrene bead, Estimate the bead's acceleration in g's
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