Which of the following is an example of a trend?

the gradual warming of earths atmosphere over time
the cyclic rising and falling of the tides.
the phases of the moon
the random assortment of coins in a jar.

f=ma newton's second law 7x8=56n

no. dot product   =0 when vecs at right angles

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.