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Physics2 FA2
| Question | Answer |
|---|---|
| Which one of the following properties could not be used as a temperature sensitive property in the construction of a thermometer? | the change in mass of a solid |
| Temperature is a microscopic concept. | False |
| Calorie is defined as the amount of heat required to raise the temperature of 1g of water by 1°C and it is defined under which of the following conditions? | From 14.5°C to 15.5°C at 760mm of Hg |
| An ideal black body is thrown into a furnace. The black body is room temperature. It is observed that ___________ | Initially, it is darkest body and at later times the brightest |
| On a hilly region, water boils at 54.05°C. What is the temperature expressed in Fahrenheit? Answer should be rounded off to two decimal places. | 129.29 |
| A copper plate has a length of 0.12 m and a width of 0.10 m at 25 °C. The plate is uniformly heated to 175 °C. If the linear expansion coefficient for copper is 1.7 x 10-5/C°, what is the change in the area of the plate as a result of the increase in tem | 6.1 × 10^5 m2 |
| Absolute zero on the Celsius temperature scale is –273.15 °C. What is absolute zero on the Fahrenheit temperature scale? | 459.67 |
| Two cubes, one silver and one iron, have the same mass and temperature. A quantity Q of heat is removed from each cube. Which one of the following properties causes the final temperatures of the cubes to be different? | specific heat capacity |
| Solids are not heated by convection because: | both A and B solid are not free to move from one place to another |
| Heat is added to a substance, but its temperature does not rise. Which one of the following statements provides the best explanation for this observation? | The substance undergoes a change of phase. |
| The liquid in the thermometer rises when it is placed in the hot water because ___________. | it gains heat from the hot water and expands. |
| The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 328 Joules of heat(Q) is added to 29grams? Answer should be rounded off to two (2) decimal places. | 29.00 |
| What is the minimum amount of energy required to completely melt a 7.25 4.87 kg lead brick which has a starting temperature of 18.039 °C? The melting point of lead is 328 °C. The specific heat capacity of lead is 128 J/(kg ∙ C°); and its latent heat of f | 455,843.81 J. |
| The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 206 Joules of heat is added to 15grams? Answer should be rounded off to two decimal places. | 35.21 °C. |
| A 2.00-kg metal object requires 5.02 x 103 J of heat to raise its temperature from 20.0 °C to 40.0 °C. What is the specific heat capacity of the metal? | 126 J/(kg ∙ C°) |
| The digital sign outside a local bank reports that the temperature is 44 °C. What is the temperature in degrees Fahrenheit? | 111 °F |
| A 200-cm^3 glass flask is filled to the brim with mercury at 20°C. How much mercury in cm^3 overflows when the temperature of the system is raised to 61°C. The coefficient of linear expansion of the glass () is 0.40 x 10^ (-5 ) K^(-1) . | 1.38 cm³ |
| On a hilly region, water boils at 100.05°C. What is the temperature expressed in Fahrenheit? Answer should be rounded off to two decimal places. | 212.09°F. |
| 540g of ice at 0°C is mixed with 540g of water at 80°C. What is the final temperature of the mixture? | 0°C |
| Place equal masses of aluminum and copper the same distance from a fire. If aluminum has a higher specific heat than copper, the one to undergo the faster increase in temperature will be the_________ | copper |
| Complete the following statement: When a substance undergoes fusion it | freezes |
| After taking a hot shower, James steps out of the shower onto the tile floor. The tile felt cold to his feet. Which explanation below best describes James' experience? | Heat from his feet is transferred to the tile floor |
| The coefficient of linear expansion of steel is 12 x 10-6/C°. A railroad track is made of individual rails of steel 1.0 km in length. By what length would these rails change between a cold day when the temperature is –10 °C and a hot day at 30 °C? | 48 cm |
| A copper plate has a length of 0.12 m and a width of 0.10 m at 25 °C. The plate is uniformly heated to 175 °C. If the linear expansion coefficient for copper is 1.7 x 10-5/C°, what is the change in the area of the plate as a result of the increase in tem | 6.1 x 10-5 m2 |
| Calculate the change in temperature of an 900mm aluminum bar, that has increased in length to 901.035mm.(α = 25 x 10-6 ) | 46oC |
| The coefficient of linear expansion of a certain solid is 9 x 10-6/C°. Assuming this solid behaves like most solids, what is its coefficient of volume expansion? | 27 x 10-6/C° |
| Which one of the following temperatures is approximately equal to "room temperature?" | 293 K |
| The coefficient of linear expansion of aluminum is 23 x 10-6/C°. A circular hole in an aluminum plate is 2.725 cm in diameter at 0 °C. What is the diameter of the hole if the temperature of the plate is raised to 100 °C? | 2.731 cm |
| On a hilly region, water boils at 52.95°C. What is the temperature expressed in Fahrenheit? Answer should be rounded off to two decimal places. | 127.31°F |
| What is the transfer of heat by direct contact? | Conduction |
| In conduction process the molecules of the solid pass the heat from one to another, ____________. | without themselves moving from one place to another. |
| The condition where two substances in physical contact with each other exchange no heat energy. They are said to be the same temperature and is referred to as : | Thermal Equilibrium |
| The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 357 Joules of heat(Q) is added to 22grams? Answer should be rounded off to two (2) decimal places. | 41.61 |
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jxxnixx