Physics

Question 1

Spring constant

Answer 1

Given value for a particular spring or wire and tells how easily the spring or wire streches.

Question 2

Moment

Answer 2

Turning force

Question 3

Center of mass

Answer 3

Average position of all the mass in an object

Question 4

Pressure

Answer 4

The force acting on each unit of surface area, or the force per unit area.

Question 5

Thermometers

Sensitivity

Answer 5

The smallest change in temperature that a thermometer can measure

Question 6

Thermometers

Range

Answer 6

The difference between the highest temperature and the lowest temperature it can measure

Question 7

Thermometers

Linearity

Answer 7

If the liquid expands by the same amount for each increase in temperature

Question 8

Waves

Wave speed

Answer 8

• Distance a part of that wave travels each second
• The crests (peaks) and troughs (or compressions) all move at the same speed through a medium
• measured in meters per second (m/s)

Question 9

Waves

Frequency

Answer 9

• The number of complete waves that pass a point each second
• measured with a unit called hertz (Hz), where one hertz is one complete vibration per second.

Question 10

Waves

Wavelength

Answer 10

• The distance between one wave crest (peak) and the next
• Also the distance between one trough and the next
• Measured in meters (m).

Question 11

Waves

Amplitude

Answer 11

• the distance between the wave crest (peak) and the center of the wave
• the greatest distance a particle moves from its resting position
• The higher the amplitude of a wave, the more energy it transfers as it moves

Question 12

Longitudinal waves

Answer 12

Particles vibrate parallel to the direction in which the wave is traveling

Question 13

Transverse waves

Answer 13

Particles in the wave vibrate perpendicular to the direction in which the wave is moving

Question 14

Wave reflection

Answer 14

Wavefront bounces off the boundary and changes direction

Question 15

Wave refraction

Answer 15

Waves slow down or speed up, changing direction

Question 16

Wave diffraction

Answer 16

Wave spreads outwards when passing through a gap

Question 17

Refraction of light

Answer 17

Wave change speed and direction from one medium to another

When light slows down - changes direction towards the normal

When light speeds up - causes change in direction away from the normal

Question 18

Thin converging lens

Answer 18

Shape piece of transparanet material dsigned to refract beems

Question 19

Static electricity

Answer 19

Occurs when friction between two insulators causes electrons to be transferred from one surface to another - one insulator gains electroins while other loses - insulators cant flow electrons back

The difference causes the electrons to jump across the gap

Question 20

Electric fileds

Answer 20

The space in which an electric charge experiences a force