A bowling ball is both sliding and spinning on a horizontal surface such that its rotational kinetic
energy equals its translational kinetic energy. What
is the ratio of the ball's center-of-mass speed to the
tangential speed of a point on its surface?

the part of the wave he is travelling on is the crest

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west