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20 POINTS

Which two adjacent planets have the largest distance between them?
Which two adjacent planets have the smallest distance between them?
What is the general pattern of the planetary distances from the sun?
Which planet has the longest day?
Which planet has the longest year?
Explain why the outer planets have a lower density than the inner planets.

Here's the answer for the pattern:

Explanation:

Mercury is 1.8 times as far away from the Sun as Venus, and Earth is 1.4 times as far away as Venus. Mars is 1.5 times the distance between Earth and Mars. Each planet may be between 1.4 and 1.8 times farther from the sun than its "inside" neighbor, according to this trend. And there's the issue of Jupiter's distance from the sun, which is 3.4 times that of Mars.

choosing tennis and golf balls is your inde choice.

their mass and volume are dep

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