Always use significant figure rules. remember that these rules apply to all numbers that are measurements. you travel 20.0 mph for 0.500 hour, 40.0 mph for 1.00 hour, 30.0 mph for 0.500 hour, and 50.0 mph for 2.00 hours. what is the total distance traveled? 200 miles 170 miles 165 miles 160 miles

Answer : d = 165 miles

Explanation :

We know that

If we travel 20.0 mph for 0.500 hour, then distance covered is 10 miles.

If we travel 40.0 mph for 1.00 hour, then distance covered is 40 miles.

If we travel 30.0 mph for 0.500 hour, distance covered is 15 miles.

If we travel 50.0 mph for 2.00 hours, then distance covered is 100 miles.

So, total distance covered will be 165 miles.

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

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide