Three small objects are arranged along a uniform rod of mass m and length l: one of mass m at the left end, one of mass m at the center, and one of mass 2m at the right end. how far to the left or right of the rod's center should you place a support so that the rod with the attached objects will balance there? express your answer in terms of some or all of the variables m, l. enter positive value if the support is placed to the right of the center of the rod. enter negative value if the support is placed to the left of the center of the rod. vo acc + 0 = ? your answer either contains an incorrect numerical multiplier or is missing one. no credit lost. try again.

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

How is the gravitational force related to the distance between two objects?

Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.