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	<title>PhysicsLessons.com - Thermal Energy Quiz</title>
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// convert twixt temperature scales

Question("Jane's cookbook calls for 375&deg; Fahrenheit but her oven uses Celsius. What temperature should be set her oven to?");
CorrectChoice("191&deg;C");
WrongChoice("240&deg;C");
WrongChoice("375&deg;C");
WrongChoice("707&deg;C");

//+273
Question("The room temperature of the laboratory was recorded to be 35&deg;C. What temperature is this in Kelvins?");
WrongChoice("-2.4&times;10<sup>2</sup> K");
WrongChoice("95 K");
WrongChoice("2.5&times;10<sup>2</sup> K");
CorrectChoice("3.1&times;10<sup>2</sup> K");

Question("How much heat energy is required to warm 3.5 kg of water from 16&deg;C to 96&deg;C?");
WrongChoice("940 J");
WrongChoice("1,530 J");
WrongChoice("5,300 J");
CorrectChoice("1,000,000+ J");

Question("How much heat energy is released when 0.039 kg of ethanol is frozen? The heat of fusion for methanol is 1.09 &times; 10<sup>5</sup> J/kg");
WrongChoice("3.6 kJ");
CorrectChoice("4.3 kJ");
WrongChoice("5.0 kJ");
WrongChoice("2.8&times;10<sup>6</sup> kJ");

Question("What is the final temperature of 0.63 kg of water that releases 2290 Joules of thermal energy? The water has an initial temperature of 48.2&deg;C.The specific heat capacity of water is 4180 J/kg &deg;C");
WrongChoice("23.1&deg;C");
WrongChoice("41.6&deg;C");
WrongChoice("68.3&deg;C");
CorrectChoice(noneOfAbove); /* noneOfAbove is defined in shared.js */

/* rejected :-/ ;-)
Question("How does the temperature of steam compare to the temperature of boiling water?");
WrongChoice("lesser or equal");
WrongChoice("equal");
CorrectChoice("greater or equal");
WrongChoice("greater");
Explanation("The boiling water and steam are both at 100&deg;C when states are changing (this makes them equal). However, steam may be of a greater temperature than water.");
*/

Question("In a pot of boiling water, the temperatures of the liquid water and steam are");
CorrectChoice("both the same.");
WrongChoice("different. The steam is hotter than the liquid water.");
WrongChoice("different. The liquid water is hotter than the steam.");
WrongChoice(noneOfAbove);
Explanation("When a mass of matter changes state, the whole mass generally has the same temperature until the entire mass has changed state.");

Question("As a copper pipe is heated, it");
WrongChoice("shrinks.");
CorrectChoice("gets longer and wider.");
WrongChoice("only gets longer.");
WrongChoice("only gets wider.");

/* not so good
Question("Suppose there is a metal A with a higher heat capacity than metal B. Both have a temperature of 20&deg;C. When heated to 30&deg;C, metal A will");
CorrectChoice("take longer to heat than metal B.");
WrongChoice("take just as long to heat as metal B.");
WrongChoice("take less time to heat up than metal B.");
WrongChoice("not explode while metal B will because metal B will exceed its heat capacity.");
*/

Question("Sam preheated her oven to 180&deg;C and then inserted the left-over chicken casserole. She then boiled water cook peas (at about 90&deg;C) on her stove. Why can she extend her arms into the oven while she needs a spoon to manipulate the peas in the water?");
WrongChoice("The boiling water is hotter.");
WrongChoice("Air has a higher heat capacity than water.");
CorrectChoice("Water has a greater heat capacity than air.");
WrongChoice("Air is more conductive than water"); /* the inverse is true...or converse... all of these ``logical'' terms confuse me :-/? */
Explanation("Water has both higher heat capacity and conductivity than air. This is why water is used in cooling systems.");

/* conduction */
Question("Microwave heats food through which method of thermal energy transfer?");
WrongChoice("convection");
WrongChoice("conduction");
CorrectChoice("radiation");
WrongChoice("diffraction");

/*  */
Question("A frying pan heats eggs through the process of");
WrongChoice("convection.");
CorrectChoice("conduction.");
WrongChoice("radiation.");
WrongChoice("diffraction.");


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<h1>Quiz 10. Thermal Energy</h1>

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