Acar goes from 80 km/h to 20 km/h in 0.5 h. what is the acceleration in km/h2?

Contrast the force of gravity between these pairs of objects a 1 kg mass and a 2 kg mass that are 1 m apart and two 2 kg masses that are 1 m apart

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?