Quiz Chapter 9: Heat

1. In a bimetallic strip made of brass and iron bonded together, brass expands faster than iron when heated. Which way will the strip bend when heated?

1. Bends towards the iron side
2. Bends towards the brass side
3. Remains completely straight
4. Twists in a spiral shape

2. Comparing the rates of thermal expansion for solids, liquids, and gases when exposed to equal temperature increases, which state expands the MOST?

1. Solids
2. Liquids
3. Gases
4. All three expand at the exact same rate

3. What phenomenon causes a sea breeze during daytime coastal weather?

1. Land cools faster than the sea
2. Land heats up faster than the sea, causing warm air above land to rise and cool sea air to blow inland
3. Radiation from sea water heats up air faster than land
4. Conduction through sea sand pushes air outward

4. When two objects at different temperatures reach thermal equilibrium after being placed in contact, what condition must be true?

1. The hotter object gains all remaining heat from the colder object
2. Both objects reach the exact same temperature, and net heat transfer becomes zero
3. The colder object becomes hotter than the original warm object
4. Heat flow reverses back and forth continuously

5. Why is mercury commonly used as the working fluid in traditional liquid-in-glass laboratory thermometers?

1. Mercury expands non-uniformly across temperature ranges
2. Mercury is an opaque metal liquid that expands uniformly and does not stick to glass walls
3. Mercury has a very high boiling point and low density
4. Mercury acts as a perfect thermal insulator

6. How do convection currents transfer heat through liquids and gases?

1. Hotter, less dense fluid rises while cooler, denser fluid sinks
2. Cooler, less dense fluid rises while hotter fluid sinks
3. Electromagnetic waves vibrate particles in a straight line
4. Particles remain stationary and transfer energy through collisions

7. Why are expansion gaps purposely left between sections of railway tracks?

1. To save steel manufacturing costs
2. To prevent tracks from buckling or bending due to metal expansion on hot days
3. To allow water drainage during heavy rainstorms
4. To reduce train wheel friction and speed up trains

8. Which method of heat transfer can travel through a complete vacuum without requiring any physical medium?

1. Conduction
2. Convection
3. Radiation
4. Evaporation

9. Why are petroleum oil storage tanks painted with reflective white or silver paint?

1. To absorb heat faster from ambient air
2. To reflect thermal radiation and reduce temperature buildup inside the tank
3. To prevent rust formation caused by rain
4. To improve visibility for night aircraft

10. Through which mechanism does heat travel through a solid metal spoon placed in hot soup?

1. Convection
2. Conduction
3. Radiation
4. Sublimation