How much physical activity should an adult have each week?
A. 60 minutes per day, 7 days a week
B. 30 Ininutes per day, 7 days a week
60 minutes per day, 5 days a week
D. 30 minutes per day, 5 days a week

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.

Acombination reaction is when two or more combine to form one product. a decomposition reaction is when a substance breaks down into two or more simpler substances in a chemical reaction.