Which of the following substances can be separated into simpler substances only by chemical means? A.
water
B.
granite
C.
salt water
D.
brass

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?