The law of universal gravitation states that any two objects in the universe, without exception,
a.
attract each other.
b.
repel each other.
c.
combine to provide a balanced force.
d.
create friction.

V1t2 = v2t1 is an expression of who’s law

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?