Answer:
motions of the planets in the solar system. They were derived by the German astronomer Johannes Kepler, whose analysis of the observations of the 16th-century Danish astronomer Tycho Brahe enabled him to announce his first two laws in the year 1609 and a third law nearly a decade later, in 1618. Kepler himself never numbered these laws or specially distinguished them from his other discoveries.
Explanation:
Answer:
no:2,3
explanation
energy is the ability to do work
period is the about of time to complete one circle
while frquency is the number of circles completed per seconds.
(Glycogen) is an essential fule for energy production in the contracting skeletal muscles
