An electric field has both magnitude and direction.
I don't think that's one of the first 3 choices.
Answer:
Bcuz when solid is near heat it changes to liquid this is called physical change
<span>A wave has a speed of 50m/sec. If its frequency is 100 hz, what's it's wavelength?</span>
Its b bc its the volume of the sphere
Answer:B
Explanation:
Calculate speed using equation:V=S/t
S=980 km ------------ distance Boston-Detroit
t=2h --------------------- time
v=?
------------------------
V=S/t
V=980km/2h
V=490km/h
