<span>The weightlifter does no work. Although he has exerted force, work is the product of force over distance. Since he has not moved the wall he has done no work.</span>
All wavelengths and frequencies of electromagnetic radiation ...
including visible light ... are features of the electromagnetic spectrum.
Sound waves have nothing to do with the electromagnetic spectrum.
Answer:
greater with the brick wall
Explanation:
the impulse does not depend whether its a haystack or a brick wall because impulse is the products mass and velocity.