Abird flies north with a force of 11n, the air resistance is 2n. how do i do a diagram of this?

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

What is the increase in density of a medium due to wave travel?