Answer:
upper part of any wave.
Explanation:
we normally define wave motion in term of movement of particles. compressions and rarefaction. rarefaction particles apart , and same as trough ( part of wave above mean line ).
We do not know how how fast the car was going
The formula for speed is distance traveled divided by time
Answer:
625 N
Explanation:
The impulse given to the nail is equal to the change in momentum of the hammer:

where
F is the force exerted by the hammer
is the time of contact
is the mass
is the change in velocity of the hammer
Substituting the data and re-arranging the equation, we can find the force:
