A protozoan swims with a speed of 3.54 mm/s. How much time (in s) would it take this protozoan to swim directly across a petri dish having a diameter of 8.07 cm?

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared

In an experiment, how can i change human errors? be specific.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?