<span>Earth (and hence the observer) moves.</span>
Answer:
250N
Explanation:
Given parameters:
Time = 4s
Momentum = 1000kgm/s
Unknown:
Force = ?
Solution:
To solve this problem, we use Newton's second law of motion;
Ft = Momentum
F is the force
t is the time
So;
F x 4 = 1000kgm/s
F = 250N
this is evolutionary psychology
Did you try looking it up ?
That type of bending is called "diffraction" of waves.