Consider a mass-spring system oscillating with an amplitude of 30 cm. If the spring constant is 50 N/m and the mass is 2 kg, what is the velocity of the mass when it is 10 cm from its equilibrium position?

In the first law of thermodynamics, triangle e=q-w, what does q stand for

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)