Which of the following methods is the most effective in determining muscular strength if you do not want to worry about selecting the wrong weight?

If element x has 99 protons how many electrons does it have

The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.

Which wave is the result of amplification and produces a louder sound