P1 Electrical Energy Flashcards
1
Q
how do you measure speed?
A
speed=distance÷time
2
Q
name the electromagnetic waves from shortest wave length to longest
A
gamma ray, x-ray, ultra-violet, infared, microwave, radio
3
Q
what is red shift?
A
a star moving away from earth
4
Q
what is the difference between a longitudinal and transverse wave?
A
a longitudinal wave has oscillations at a right angle to the direction of travel and transverse waves have oscillations in the same direction of travel
5
Q
what does cost efficient mean?
A
you get back the money you spend on something by reducing bills
