Question : Gliders depend on the following energy for their flight:

Option 1: wind energy

Option 2: electrical energy

Option 3: heat energy

Option 4: chemical energy

Question : In ecology, _________ is determined by dividing the biomass per unit area by the age of the forest ecosystem.

Option 1: biomass density

Option 2: biomass size

Option 3: biomass energy flow

Option 4: biomass productivity

Question : One calorie of heat energy is equivalent to approximately ____________ joules of mechanical energy.

Option 1: 0.24

Option 2: 0.48

Option 3: 2.4

Option 4: 4.2

Question : A jet engine works on the principle of conservation of________.

Option 1: heat

Option 2: mass

Option 3: linear momentum

Option 4: angular momentum

Question : The first law of thermodynamics is related to the conservation of which one of the following?

Option 1: Energy

Option 2: Number of molecules

Option 3: Number of moles

Option 4: Temperature