Work and Power

Question 1

What is the def of Energy

Answer 1

Capacity to do work, In Joules

Question 2

How to calc work

Answer 2

Force x distance

Question 3

How to calc power

Answer 3

work done (J) /time( S)

Question 4

What is the voltage of main

Answer 4

230V D.C

Question 5

how many times does ac change

Answer 5

50

Question 6

What colour are the wires in a plug

Answer 6

Earth is yellow and green, Neutral is blue, and live is brown

Question 7

Where are the pins located in a plug

Answer 7

Earth at top, neutral left, live right/middle

Question 8

What is the def of power

Answer 8

The rate at which energy is transferred

Question 9

What is the unit for power

Answer 9

wat

Question 10

What is work done

Answer 10

Energy lost by

Question 11

Why would in a open system, the total energy decrease

Answer 11

Work dine by friction or air resistance will cause a decrease in total energy

Question 12

What is pressure in fluids

Answer 12

Weight of the column of water above an object pushing down

Question 13

Explain how a car transfers energy (inside and outside of the car)

Answer 13

Fuel forms a store of chemical (potential) energy
chemical energy is transferred to kinetic energy and
thermal energy when the car moves
kinetic energy transferred to thermal energy as the car slows down