1. What is pressure? And what things can change it? 2. What is efficiency? What is...

1. What is pressure? And what things can change it?

2. What is efficiency? What is waste heat?

Expert Solution

1).

Pressure is force exerted on a surface per unit area. The standard unit of pressure is the pascal.

Pressure=Force/Area

Unit: is N/m^2

Examples: Pressure can change the volume or it can change boiling point

2).

The percentage of energy used in the useful work

or

The percentage of input to a engine or machine that is consumed in useful work and not wasted.

where is efficiency

Q1 is heat absorbed

Q2 is heat dumped to the sink

Unit: Dimensionless

The remaining energy, the energy which dumped to the sink is called waste heat.i.e which is not useful in the work.

genius_generous answered 2 years ago

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