What is the frequency of a wave having a period equal to 18 seconds? (Hint: f=1/P) 0.066 Hz

0.055 Hz

0.033 Hz

0.018 Hz

come closer and become far apart and become steam/gas

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.