Three bars each made of different materials are connected together and placed between two walls when the temperature is 12 oc. determine the force exerted on the rigid supports when the temperature is increased to 25oc. also determine the stress in each material at 25oc.

An apple is falling from a tree. disregarding air resistance, which diagram shows the free-body diagram of the force or forces acting on the apple?

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.

Aregular polygon has angkes of size 150° each.how many side has the polygon