In the diagram below, which of the following represents the equilibrium? diagram of wave. the distance from the top of one wave to the top of the next wave is labeled 'a.' the high point of each wave is labeled 'b.' the low point of each wave is labeled 'c.' the midway point between 'b' and 'c' is labeled 'd.' a b c d

The answer is D.

A is the wavelength. As it says in its title, it shows the length of one complete wave.

B is the crest. This is the point in the wave where it's at its highest.

C is the trough. This is the point in the wave where it's at it's lowest.

And lastly, D is the equilibrium position. These are the points on the wave where they touch the equilibrium, or the horizontal line going through the wave.

asthenosphere and convection

so here is the information for current research:

-nrel's geothermal analysts, scientists, and engineers perform a full range of research from developing advanced methods of locating and accessing geothermal resources to exploring innovative technologies to extract and produce clean energy from the heat of the earth

and here is the information for the technology of geothermal energy:

-it's clean and sustainable

-resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma

-almost everywhere, the shallow ground or upper 10 feet of the earth's surface maintains a nearly constant temperature between 50° and 60°f (10° and 16°c)

-geothermal heat pumps can tap into this resource to heat and cool buildings

-a geothermal heat pump system consists of a heat pump, an air delivery system (ductwork), and a heat exchanger-a system of pipes buried in the shallow ground near the building

-in the winter, the heat pump removes heat from the heat exchanger and pumps it into the indoor air delivery system

-in the summer, the process is reversed, and the heat pump moves heat from the indoor air into the heat exchanger

-the heat removed from the indoor air during the summer can also be used to provide a free source of hot water