Which of the following statements is true? All plants can make their own food.
Photosynthesis only happens in plant leaves.
Photosynthesis needs light energy to happen.
All of the above.

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 is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Aphysical change is a change in the size, shape,, or stafe of matter true or false