How much work is required to stop an electron (m=9. 11×10−31kg) which is moving with a speed of 1. 90×106 m/s ?.

Asample of a gaseous substance changes into a liquid

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

Aturntable that spins at a constant 74.0 rpm takes 3.10 s to reach this angular speed after it is turned on. find its angular acceleration (in rad/s2), assuming it to be constant, and the number of degrees it turns through while speeding up.