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• Air in a cylinder is compressed to one-tenth of its original volume without change in temperature. What happens to its pressure? Imagine now that a valve is opened in order to restore the initial pressure value. What percentage of the molecules have escaped?
• Consider a 40,000 km steel pipe in the shape of a ring that fits snugly all around the circumference of the Earth. We are heating now the ring so its temperature increased by 1 degree C. Now, the pipe will no longer be snug. How high the ring will now stand above ground level? (Make as many simplifications as necessary). Data: Coefficient of linear expansion for steel is 11*10-6 /degree C. This means, for example, that a 1-meter bar of steel that increases its temperature by 1 degree C will expand 11*10-6 meters (11 micrometers)
• Farmers resort to spraying fruit trees with water before a frost to protect the fruit from freezing. Using the concepts learned in this module, discuss why this does or does not work.
• An electric fan not only does not decrease the temperature of the air, but it actually increases air temperature. How can you then explain that you are cooled by a fan
A 50 kilogram archer, standing on frictionless ice, shoots a 95 gram arrow at a speed of 95 m/s. Determine what is the recoil speed of the archer
A cylindrical bucket, open at the top, is 29.0cm high and 12.0cm in diameter. How High will the water in the bucket rise
A vertebra is subjected to a shearing force of 445 N. Find the shear deformation, taking the vertebra to be a cylinder 3.00 cm high and 4.00 cm in diameter
When a battery is connected to a 89.0-? resistor, the current is 3.91 A. When the same battery is connected to a 417.0-? resistor, the current is 0.848 A. Find the emf supplied by the battery
Determine the tension T in the string.
A snowboarder starts from rest and rides 39.47 m down a snow-covered slope that makes an angle of 33.19° with the horizontal, How far will she travel along the flat snow
What is the change in internal energy of a system that takes in 2.80 x 106 J of heat, and does 4.50 x 105 J of work while dissipating 6.00 x 106 J of heat
Light waves with two different wavelengths, 632nm and 474nm, pass simultaneously during a single slit whose width is 7.5 x10-5m and strike a screen 1.20 m from the slit.
Find the maximum altitude reached by the rocket.Find its total time of flight.
white light spans the wavelength range between about 400 nm and 760 nm. if white light passes through two slits 0.25 nm
what kind of collision is exhibited by a marble going down a chute onto a ruler and colliding with four other marbles on the ruler, and why?
A Power Center with a power plant of its own supplies a house some distance away with electric power. The house draws 5.0 A of current. This current runs from the power plant along a buried copper wire, during radios in the house, and back to the pla..
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