What chemical change occurs when a more reactive substance replaces a less reactive substance in a compound?
a.
oxidative
c.
reduction
b.
displacement
d.
endothermic

Jason and alejandro lift a chair 2 meters into the moving truck using 150 newtons of force. it takes them 3 seconds to lift the chair how much power did they use

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?

What is a subatomic particle with a negative charge and very little mass?