A3kw oven supplied with 3mj of energy. how many minutes can it run for

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

If a simple machine reduces the strength of a force, what must be increased?

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.