Mary hikes 5 km north, then turns and hikes 2 km west, then turns south and hikes 4 km. What is her displacement? Remember to give magnitude (how far) and direction
(what angle and in what direction). Type your answer in the blank.

The equation that describes a transverse wave on a string is y = (0.0120 m)sin[(927 rad/s)t - (3.00 rad/m)x] where y is the displacement of a string particle and x is the position of the particle on the string. the wave is traveling in the +x direction. what is the speed v of the wave?

On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units

Does heating a metal wire increase or decrease its electrical resistance? why?