Calculate the thickness of the patient skin if 40%of the incident X-rays were absorbed by his flesh, let the absorption coefficient be 2units​

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.

Madison pushes with a 210-n horizontal force on a 24-kg crate of coffee resting on a warehouse floor. the force of friction on the crate is 74 n. what is the acceleration?

What is the role of lenses in microscopy?