What is the x component that of a vector that is defined 2.5m at 64 degree? A) -2.2m
B) 1.1m
C) 2.2m
D) -1.1m

Explanation:

This is a displacement vector since it is given in terms of a distance (meters, to be specific). The way you find the x-component is:

which means you multiply the magnitude (length) of the vector times the cos of the direction (the angle):

to get

1.1 m, choice B.

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

wavelength divides in half and speed stays the same.