Q4 M6 - HEAT AND WORK

Hot objects begin to cool as _________

• cooler air is transferred to the hot object
• atoms in the object react with oxygen in the air
• thermal energy in the object cancels out energy in the air
• thermal energy in the object is transferred to the surrounding air

Heat passes from _________

• high to low
• cold to hot
• hot to cold
• heat cannot be passed

During summer seasons, what happens to your body’s internal energy after taking a bath?

• decreases
• no change at all
• increases
• there is no definite pattern

The unit of work is same as the unit of _________

• energy
• force
• entropy
• power

When two bodies are in thermal equilibrium with a third body

• Zeroth Law of Thermodynamics
• First Law of Thermodynamics
• Second Law of Thermodynamics
• Planck’s Law

Heat is another form of _________

• energy
• matter
• mass
• temperature

The convection of heat occurs in liquids and gases. Which one of the following statements about convection is CORRECT?

• Hot liquids rise above cold liquids.
• Convection occurs in water, but does not occur in air.
• The particles in a liquid travel more slowly when heated.
• In a hot water tank, the heating coils are placed at the bottom of the tank.

Heat may be transferred in three different ways. One of these methods of heat transfer does not require a medium. Which one of the following is this?

• conduction
• insulation
• convection
• radiation

Which one of the following definitions best describes the concept of work?

• The force associated with molecular motion.
• The random motion of molecules in a gas at low pressure.
• The flow of energy from one body to another through uniform molecular motion.
• The flow of energy from one object or substance to another due to a difference in temperature.

The movement of thermal energy from a warmer object to a cooler object is called _________

• heat
• thermal energy
• temperature
• convection current