A wire moves through a long cylindrical furnace. The wall of the furnace is heated to 1100 K and the wire is at 700 K. Determine the power requirement per unit length of furnace. The diameter of the wire is 0.5 cm and that of the furnace is 10 cm. Assume blackbody radiation.

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.

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot