Answer:
Mass doesn't change.
Weight is measured based on gravitational pull.
Explanation:
P = m*v
7.5 = m*15
m = 7.5/15 = 0.5 kg
So that we do not contaminate it with microorganisms or garbage or other human stuff.
The formula for velocity is distance divided by time, or d/t. The distance is 500 km and the time is 1.2 hours. 500/1.2 is 416.6 km/hr.
