Energy
If you drop a hot rock into a pail of water, the temperature of the rock and the water wil change until both are equal. The rock will cool and the water will warm.Yes, the same principle holds true if the rock is dropped into a large lake because given thermal contact,heat flows from the higher temperature substance into the lower temperature substance.It flows from the hot tack to the cooler water. heat flows according to its own from a cooler substance into a hotter substance.If you stake out a plot of land with a steel tape measure using map measurements on avery hot day,I will enclose less land thanmy measurements indicate because sand's low heat capcity, as evienced by how quickly the surface warms in the morning sun and how quickly it cools at night,affects local climates. a metal ball is just able to pass through a metal ring.When the ball is heated, thermal expansion will not allow it to pass through the ring.What would happen if the ring, rather than the ball, were heated is that the ring will expand due to the heat capacity which eventually will be big enough for the ball to pass through the heated ring.The size of the hole in the ring will increase due to the heat capacity which makes the size of the hole i the r
After a machinist slips a hot, snugly fitting iron ring over a cold brass cylinder, the ring becomes "locked" in position and can't be removed even by susequent heating.This procedure is called"shrink fitting".This occurs when the temperature of a substance is increases, its molecules jiggle faster and normally tend to move farther apart.This results in an expansion of the substance.Ican conclude about the thermal expansion rates of iron and brass that with few exceptions, all forms of matter-solids, liquids, and gases - expand when they are heated and contract when they are cooled.For comparable presuures and comparable changes in temperature, gases generally expand or contract much more than liquids , and liquids expand and contrat more than solids. celand, co named to discourage conquest by expanding empires, is not all ice-covered like Greenland and parts of siberia, even though it is nearby on the Arctic Circle.The average winter temperature of Iceland is considerably higher than regions at the same latitude in eastern Greenland and central Siberia.This is so because of water's high heat capacity, ocean temperatures does not vary much from summer to winter.The water is warmer than the air in the winter, and cooler than the air in the summer land, with a lower specific heat capacity,gets hot in summer but cools rapidly in winter.Its important to protect water pipes so they don't freeze because liquids expand appreciably with increase in temperatures. Water at the following temperatures will expand when warmed:0C 4C 6C because all liquids wil expand when they are heated.Ice cold water however does just the opposites Water at the temperature of melting ice 0C or 32F contracts when thetemperature is incre
Some topics in this essay:
,
Arctic CircleThe,
heat capacity,
specific heat,
water absorbs,
gram iron,
internal vibrations,
temperature water,
absorbs heat gram,
water absorbs heat,
due heat capacity,
molecules soak,
hole ring,
snugly fitting,
rotations internal,
gram iron change,
heat gram iron,
Join now to see the rest of the essay!
Approximate Word count = 1164
Approximate Pages = 5 (250 words per page double spaced)
More Essays on Energy Professional Papers: |
CUSTOMER SERVICES
|
|
Saved Papers
You haven't saved any papers.
|