physics review GR 8

What is the formula of calculating speed ?

• s= d / t

• s=d x t

• s = t / d

what is the formula calculating the acceleration ?

• a=v x t

• a = v / t

• a= t /v

Which waves are fastest?

• light

• sound

• water

What type of waves are sound waves?

• water

• longitudinal

• transvers

what is the wave length of the wave ?

• the maximum height of the wave

• the number of waves per second

• the distance between the two same point on the wave

what type of wave are the light waves

• longitudinal

• transvers

• non of the above

The highest point of a transverse wave

• Compression

• Amplitude

• Crest

• Refraction

Bar magnets have two poles. What are they?

• north and south

• east and west

• positive and negative

What would you detect by using a compass, iron filings, and iron objects?

• magnetic field

• electricity

• direction

when an object is in motion , it's ............ must change .

• velocity

• acceleration

• position