P2 - Definitions

Question 0

Voltage?

Answer 0

Work done per unit charge

Question 1

Current?

Answer 1

The rate of the flow of charge

Question 2

Half Life?

Answer 2

Time taken for half of the nuclei of a radioactive element to decay and emit radiation

Question 3

Fission?

Answer 3

Splitting of the nuclei to form smaller nuclei

Question 4

Fusion?

Answer 4

Joining of small nuclei to make larger nuclei

Question 5

Speed?

Answer 5

How fast an object is moving (m/s)

Question 6

Velocity?

Answer 6

How fast an object is moving in a certain direction (m/s)

Question 7

Newtons 3rd Law?

Answer 7

Every action has an equal and opposite reaction

Question 8

Newtons 2nd Law?

Answer 8

F=ma

Question 9

Power?

Answer 9

Rate of doing work

Question 10

Limit of proportionality?

Answer 10

The point at which the force applied and extension of an elastic object stops being proportional. After this point the object will be permanently stretched

Question 11

1 watt?

Answer 11

1 joule of energy transferred per second

Question 12

Aerodynamic?

Answer 12

Shaped so that air flows easily past the object, minimising air resistance

Question 13

Static?

Answer 13

The transfer of charge from one material to another that is an insulator

Question 14

Potential difference?

Answer 14

Driving force that pushes the current around (V)

Question 15

Double insulated?

Answer 15

When an appliance has plastic casing with no metal parts showing

Question 16

Two-core cables?

Answer 16

When a plug only has live and neutral wires as the plug is double insulated

Question 17

Power of an appliance?

Answer 17

Energy use per second