Calculate the electrostatic force between the two charged spheres in the diagram below. (Assume that the charges on the spheres are each 0.000 005 C and that
the spheres are 0.5 meters apart).

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to