PHYS 101-D16 LUO_Quiz5 2021 SUMMER GUIDE

PHYS 101-D16 LUO_Quiz5 2021 SUMMER GUIDE Question 1 The specific heat capacity of water is about twice the specific heat capacity of ice. From this information, the amount of heat required to boil 1 kg of water is the amount of heat required to melt 1 kg of ice. • Question 2 “Firewalkers” step on the hot ashes and coals from a wood fire without getting their feet burned. How might this be possible? • Question 3 A key is placed in a hot oven and warmed to 100°C. As a result • Question 4 A device that makes use of a bimetallic strip is • Question 5 An example of a heat mover is • Question 6 The Eiffel tower in Paris is made primarily of iron, whose coefficient of linear expansion is about 10 × 10−6/°C. On a cold day when the temperature is –10°C the Eiffel tower is 300 meters tall. Its height on a hot day when the temperature is 40°C is • Question 7 A bimetallic strip is usable as a thermometer because of • Question 8 The temperature of a gas can be increased by • Question 9 Natural processes tend to increase the of thermodynamic systems. • Question 10 Air at a temperature of 32° F has a relative humidity of 60%. If the temperature of the same air rises to 40° F, the relative humidity • Question 11 specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C A 1 kg block of ice is removed from a freezer where its temperature was – 10°C. The amount of heat absorbed by the ice as it warms to 0°C is • Question 12 When ice melts, its temperature • Question 13 A piece of chocolate melts in your mouth. This is an example of • Question 14 When droplets of condensation form on the outside of a glass of ice water, it must be that in the air right next to the glass • Question 15 A piston compresses a gas, while at the same time heat is lost to the surroundings. The temperature of the gas rises. The amount of temperature rise is governed by • Question 16 Air at a temperature of 32°F has a relative humidity of 60%. If the temperature of the same air increases, the relative humidity increases. • Question 17 The dew point is the temperature at which a given humidity equals the saturation density. • Question 18 A bimetallic strip is usable in a thermometer because of its heat capacity. • Question 19 You feel warm from the Sun at the beach because of heat radiation. • Question 20 A hot pizza contains heat. • Question 21 A bimetallic strip is formed from two materials that have different heat capacities. • Question 22 Heat is transferred from a substance if it is exposed to something that has a lower temperature. • Question 23 A barometer can work because of a bimetallic strip. e • Question 24 A steam turbine is an example of a heat mover. • Question 25 A refrigerator is an example of a heat mover. • Question 26 Select the closest matching pairs possible. 3 pts for each response. o Question Selected Match Liquids Linear Thermal Expansion Kelvin Temperature Entropy The First Law of Thermodynamics • Question 27 Needs Grading The titanium shell of an SR-71 airplane would expand when flying at a speed exceeding 3 times the speed of sound. If the skin of the plane is 400 degrees C and the linear coefficient of expansion for titanium is 5x10 -6 /C when flying at 3 times the speed of sound, how much would a 10-meter long (originally at 0C) rod portion (1-dimension) of the airplane expand? Write your final answer in centimeters and show all of your work.