Answer:
by moving your hands up and down your we're creating transverse wave which travel in a right angle shape towards your friend
Answer:
Not acted upon there is no motion
Forces acted upon there is motion
You can refer to the definition stated below:
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. ... If that velocity is zero, then the object remains at rest.
Answer:

Explanation:
The difference of pressure is given by gauge pressure:



Answer:
605 J
Explanation:
Efficiency = work out / work in
0.78 = W / 775 J
W = 605 J
Answer:
Speed and direction affect pitch.