Physics Heat & Thermodynamics Level: Misc Level
A steel aircraft carrier is 368 m long when moving through the icy North Atlantic at a temperature of 2.5%C. By how much does the carrier lengthen when it is traveling in the warm Mediterranean Sea at a temperature of 18% C?
Physics Heat & Thermodynamics Level: Misc Level
A thin rod consists of two parts joined together. One-half of it is silver and one-half is gold. The temperature decreases by 24 C% Determine the fractional decrease in the rod,s length using the formula above, where Lo, silver and Lo, Gold are the initial lengths of the silver and gold rods.
Physics Heat & Thermodynamics Level: Misc Level
A rod made from a particular alloy is heated from 23.5% C to the boiling point of water.Its length increases by 8.51x 10-4 m. The rod is then cooled from 23.5% C to the freezing point of water. By how much does the rod shrink? m.
Physics Heat & Thermodynamics Level: Misc Level
A inventor claims to have constructed an engine that has an efficiency of 75% when operated between the boiling and freezing points of water. Is this possible?Explain.
Physics Heat & Thermodynamics Level: Misc Level
Find the minimum amount of energy reqired to completely melt at 130 g of silver, initially at 15.0 C.
Physics Heat & Thermodynamics Level: Misc Level
A steel rod is 3.000 cm in diameter at 25 C. A brass ring has an interior diameter of 2.992 cm at 25 C.At what common temperature will the ring just slide onto the rod?
Physics Heat & Thermodynamics Level: Misc Level
A 2.0 kg block of lead melts at its melting point of 327.3 C. Calculate the change in its entrophy.
Physics Heat & Thermodynamics Level: Misc Level
Zirconium tungstate is an unusual material as it,s volume shrinks with an increase in temperature for the temperature range 0.3 k to 1050 k (where it decomposes). The volumetric coefficent of thermal expansion is -26.4 x 10-6/k. What is the ratio v/v0 for the above temperature range (in percentage)?
Physics Heat & Thermodynamics Level: Misc Level
A metal rod 40.0000 cm long at 40%C is heated to 60% C. The length of the rod is then measured to be 40.0105 cm. What is the coefficient of linear expansion of the metal in units of /%C?
Physics Heat & Thermodynamics Level: Misc Level
An engine operates at half its theoretical (carnot )efficency between 545% C and 310%C. What is the efficiency of the engine?
Physics Heat & Thermodynamics Level: Misc Level
A 1-kg chunk of ice at 0% C melts, absorbing 80,000 cal of heat in the process. Which of the following best describes what happens to this system?
a.increased entropy
b.lost entropy
c.entropy maintained constant
d.work converted to energy
Physics Heat & Thermodynamics Level: Misc Level
In a cloud formation, water vapor turns into water droplets which get bigger and bigger until it rains. Theis will cause the temperature of the air in the clouds to;
a.get warmer
b.get cooler
c.be completely unaffected
d.There is no air in clouds
Physics Heat & Thermodynamics Level: Misc Level
Which of the following processes of heat transfer may take place in a vacuum?
a.conduction
b.convection
c.radiation
d.induction
e.None of the above choices are valid
Physics Heat & Thermodynamics Level: Misc Level
If 50 grams of hot ware at 80 oC is poured into a cavity in a very large block of ice at 0oC, what will be the final temperature of the water in the cavity?How much ice must melt in order to cool the hot water down to this temperature?
Physics Heat & Thermodynamics Level: Misc Level
The specific heat capacity of ice is about 0.5 cal/g* OC. Supposing that it remains at that value all the way to absolute zero, calculate the number of calories it would take to change a 1-gram ice cube to absolute zero (-273 OC) to 1 gram of boiling water. How does this number of calories with the number of calories required to chabnge the same gram of 100OC boiling water to 100OC steam?
