I think the answer is (C.) but im not sure
Answer:0.302
Explanation:
Given
mass of crate m=27 kg
Force required to set crate in motion is 80 N
Once the crate is set in motion 56 N is require to move it with constant velocity
i.e. 80 N is the amount of force needed to just overcome static friction and 56 is the kinetic friction force
thus

where
is the coefficient of static friction and N is Normal reaction





The answer is
C. periodic fluctuations in the intensity if sound waves.
Hello!
Since the two weights are <em>off</em> the table, the block will move towards letter F.
I hope this helps :))
A single magnetic field is shown.