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An aluminum block slides along a horizontal surface. The block has an initial speed of 9.4 m/s and an initial temperature of 9.1degrees C. The block eventually slides to rest due to friction. Assuming all the initial kinetic energy is converted to heat energy and all this energy stays in the block, what is the final temperature of the block? (Note: The specific heat of aluminium is 900 J/kg . K)
A 1.0- kg mass is attached to a string wrapped around a shaft of negligible mass and having a 5.0- cm radius. How far apart are the masses of the dumbbell
idetailed and elaborate responses to the following questions.nbsp your response to each should be a minimum of one
As morning sunlight falls on a tethered helium balloon, it expands from a volume of 1.10 cross 103 m3 to a volume of 1.17 cross 103 m3. how much does the helium's internal energy increase
a sled is resting on packed snow. the coefficient of kinetic friction is now only 0.12. if a person weighing 650 N sits on the sled, what force is needed to pull the sled across the snow
The balance wheel of a watch oscillates with angular amplitude 0.90? rad and period 0.68 s. Find the maximum angular speed of the wheel
A solid disk of radius R and mass 2.66 kg is spinning at angular velocity 66.2 rpm about a vertical axis. What is the mass of the second disk
A small 4.50 brick is released from rest 3.00 above a horizontal seesaw on a fulcrum at its center, Find the angular momentum of this brick about a horizontal axis through the fulcrum
A small immersion heater is rated at 350 W. Estimate how long it would take a heat a cup of soup (assume this is 250 mL of water) from 20C to 60C.
A cylinder with a moveable piston contains 178 mL of nitrogen gas at a pressure of 1.22 atm and the temperature of 298 K. What should the final volume be for the pressure of the gas to be 1.52 atm at a temperature of 335 K.
The eyepiece of a microscope has a focal length of 1.25 cm and the objective lens focal length is 1.62 cm. what is the angular magnification of the microscope
A medicine ball is thrown at Bob (who is standing still). The medicine ball weighs 6kg and Bob weighs 82.50 kg. What was the velocity of Bob and the ball after the catch
One end of a 30 cm long aluminum rod with diameter 2 cm is kept at 460*C while the other end is held in water at 25*C. Find the rate of heat conduction along the rod
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