A light balloon is filled with helium at 0°C and 1.0 atm and then released from the ground.
Determine its initial acceleration. The acceleration of gravity is 9.81 m/s2. Disregard
the air resistance on the balloon.
Answer in units of m/s2.

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !

the higher the current the higher the mag field around it the higher the influence on the compass

one "light year" is the distance that light travels, through vacuum, in one julian year.   that's 365.25 days, of 24 hours each.