A skydiver accelerates downwards with a Force of Gravity of 620 N and a force of friction (air resistance) of 300 N. What is the mass of the skydiver?

Ahorizontal wire is tied to supports at each end and vibrates in its second-overtone standing wave. the tension in the wire is 5.00 n, and the node-to-node distance in the standing wave is 6.28 cm. (a) what is the length of the wire? (b) a point at an anti- node of the standing wave on the wire travels from its maximum upward displacement to its maximum downward displacement in 8.40 ms. what is the wire's mass?

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Coal contains energy. a. light b. kinetic c. chemical d. mechanical