The average Olympic runner has a mass of 67.8 kg and accelerates at 10.38 m/s2. What is the force accelerated by an Olympic runner?

A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.

What’s #16 asking and how do i solve it?

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?