Rocks from volcanoes are used by scientists to study the interior of the earth

TRUE OR FALSE​

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.