A rocket accelerates from 0 to 20 km/s. five seconds after reaching 20 km/s. the
rocket is travelling a 280 kmls. What
is the overage acceleration of the rocket
Initial speed:
final speed:
total time:

How does a sample of helium at 15 degree celsius compare to a sample of helium at 215 k? a) the helium at 15 degrees celsius has a higher average kinetic energy that the sample at 215 k. b) the helium at 15 degrees celsius has lower nuclear energy that the sample at 215 k. c) the helium at 15 degrees celsius has slower- moving atoms that the sample at 215 k. d) the helium at 15 degrees celsius has smaller atoms than the sample at 215 k.