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The amount of heat energy a refrigerator removes from the food stored inside it is _____ the amount of electrical energy required to run the refrigerator.
used in thermostats and some thermometers
can be increased by doing work on a substance or by adding heat to it
main mechanism of heat transfer in a solid
the temperature scale most commonly used in the United States
this is how we receive heat from the sun
refrigerators, air conditioners and heat pumps are examples
the temperature scale based on setting the freezing point of water at 0 and the boiling point of water at 100.
the best that a heat engine can have
heat transfer by way of buoyant mixing in a fluid
the temperature scale where the numeriocal value is proportional to the average kinetic energy of atoms and molecules in a substance
The coefficient of linear expansion of ordinary glass is three times that of Pyrex glass. An ordinary glass rod and a Pyrex glass rod of equal lengths at room temperature are dropped into boiling water. The change in length of the ordinary glass rod will be _____ the change in length of the Pyrex glass rod.
When water boils, its temperature
The internal energy of a volume of gas can be increased by(A) compressing it.(B) allowing heat to flow into it.(C) allowing it to expand.(D) none of the above.
The warmth you feel from the sun at the beach is an example of
What is the maximum efficiency (in percent) of a heat engine operating between 293 kelvins and 273 kelvins, which is the temperatures at the surface and several hundred meters below the surface, respectively, of the ocean?
Which of the following correlates best with the average temperature of the earth . . .
A piece of chocolate melts in your mouth. This is an example of
Natural processes tend to increase the _____ of thermodynamic systems.
What is the principle mechanism causing earth's temperature to warm and cool?
Solar activity affects cloud formation, which is part of the earth's natural thermostat. High solar activity retards cloud formation, and the earth warms. With low solar activity there is more cloud formation and the earth cools.
When a substance comes in contact with something that has a lower temperature,
heat is transferred from the substance.
Which are bigger: Celsius (Centigrate) degrees or Fahrenheit degrees?
The total kinetic and potential energies of all the atoms and molecules of a substance is its
Heat transfer by radiation occurs via
A baseball with mass 0.14 kilograms and speed 40 m/s is caught. If all of its kinetic energy is converted to internal energy as it is caught, what is its temperature change in degrees Celsius? (Assume the baseball's specific heat capacity is 1,000 joules per kilogram degree Celsius, and remember that kinetic energy is ½mv2.)
Why do bridges have expansion joints?
to keep them from buckling and cracking because of seasonal temperatuire changes.
You hold one end of a solid rod in a fire, and the other end becomes hot. This is an example of
Answer questions on the basis of the following information: specific heat capacity of ice = 2,000 J/kg-ºC specific heat capacity of water = 4,000 J/kg-ºCHow much heat -- measured in Joules -- is required to raise the temperature of 1 kg of water from 0ºC to 10ºC? (adsbygoogle = window.adsbygoogle || []).push({});
When ice melts, its temperature
The air inside a bicycle tire pump has 60 joules of work done on it as 20 joules of heat is conducted away from it. What is the change in internal energy of the air in joules?
Your feet feel colder when you step barefoot off a wool rug onto a hardwood floor in the winter. Why?(A) The hardwood floor is at a lower temperature than the rug.(B) The hardwood floor is at a lower temperature than your feet.(C) The hardwood floor conducts heat away from your feet better than the rug.(D) all of the above
The specific heat capacity of copper is three times the specific heat capacity of lead. Equal masses of copper and lead are heated from room temperature to the temperature of boiling water. To achieve this, the amount of heat added to the copper is _____ the amount of heat added to the lead.
Answer questions on the basis of the following information: specific heat capacity of ice = 2,000 J/kg-ºC specific heat capacity of water = 4,000 J/kg-ºC1 kg of ice in a large beaker begins to melt. The beaker is placed over a bunsen burner, and both ice and water remain after 10,000 Joules of heat is added. How much does the temperature rise in ºC?
_____________ provides a natural thermostat which has consistently kept the earth's temperature in a "liveable" range.
The internal energy of a substance can be increased by(A) doing work on it.(B) letting it do work.(C) adding heat to it.(D) extracting heat from it.(E) none of the above.
What is the approximate percentage of carbon dioxide (CO2) in the atmosphere?
Less than one-tenth of 1%
Answer questions on the basis of the following information: specific heat capacity of ice = 2,000 J/kg-ºC specific heat capacity of water = 4,000 J/kg-ºCA 1 kg block of ice is removed from a freezer where its temperature was -10 ºC. The amount of heat -- measured in Joules -- absorbed by the ice as it warms to 0 ºC is
A key is placed in a hot oven and warmed to 100ºC. As a result
In a steam engine, steam at 140 ºC in a turbine does work on an external system, and the steam leaves the turbine at 100 ºC. The efficiency of the steam engine is 5%. The relevant physical principle is
the second law of thermodynamics.
The Eiffel tower in Paris is made primarily of iron, whose coefficient of linear expansion is about 12 x 10-6/ºC. On a cold day when the temperature is - 10 ºC the Eiffel tower is 300 meters tall. Its height in meters on a hot day when the temperature is 40 ºC is
A bimetallic strip is formed from two materials that have different
coefficients of linear expansion.
A wood stove in the corner of a cabin causes the entire cabin to become heated. This is an example of |
A bimetallic strip is formed from two materials that have different
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