You notice a light from the ocean approaching you at a speed of 43 m/s. The light has a frequency of 12 Hz. Find the observed frequency.

The rocks expand when there hot/warm  and contract when they are cold.

The independent variable would be the fertilizer as it is what the dependent variable (the growth of grass) depends on.

Cardiac muscle causes movement in the bone.

So since the snail is moving at 3.6  miles per hour you multiply by 5280 to change it into feet per hour. so you get 36*528 ft per hour. since there are 3600 seconds in an hour, you divide 36*528 by 3600. so simplifying we get 528/100 which is 5.28 ft per second