The space shuttle starts at rest and must reach a velocity of +10,000 m/s (22,000 miles/hour). The acceleration of the space shuttle is +50 m/s^2. How long (in seconds) does it take to reach this acceleration? How many minutes is this?

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.