The speed of light in a vacuum is 300,000,000 m/s
That is three hundred million meters per second.
Therefore, the answer is
C) millions of meters per second
T = 2π × √(m/k)
T period
m mass
k spring constant
Head pressure from hundreds of feet of depth behind a dam drives the mighty generators below. Divide the depth in inches by 27.71-inches/psi, or the depth in feet by 2.31-feet/psi which are the English unit conversion factors. The result is the water head pressure expressed in psi.
What causes the ballon to fly away is the air pushing out of the balloon also tied in with air pressure