Example to show that friction is both a five friend and a foe​

Examples to show that friction is a friend and a foe: Friction is friend: (i) Friction allows us to grip and catch different objects. (ii) It helps us to walk comfortably on the surface. (iii) It helps to minimize the speed or to stop the moving objects.

Hope it helps :)

Have great Day  

S༙o༙m༙e༙t༙im༙e༙s༙, w༙e༙ c༙h༙i༙l༙d༙l༙i༙s༙h༙l༙y༙ w༙a༙n༙t༙s༙ t༙o༙ s༙l༙p༙i༙ o༙n༙ t༙h༙e༙ f༙l༙o༙o༙r༙,F༙i༙c༙t༙i༙o༙n༙ i༙f༙ w༙o༙r༙k༙s༙ c༙o༙r༙r༙e༙c༙t༙l༙y༙,i༙t༙ i༙s༙ a༙ f༙r༙i༙e༙n༙d༙ b༙u༙t༙ i༙t༙ g༙o༙e༙s༙ b༙e༙y༙o༙u༙n༙d༙ t༙h༙e༙ i༙m༙a༙g༙i༙n༙a༙t༙i༙o༙n༙ ,w༙e༙ f༙a༙l༙l༙ a༙n༙d༙ h༙e༙ b༙e༙c༙o༙m༙e༙s༙ o༙u༙r༙ f༙o༙e༙ :)

d) the number of neutrons plus the number of protons

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