Exercice 3: descente en rappel Pour descendre par ses propres moyens du sommet d'une paroi, le grimpeur a recours à la technique du rappel. Muni d'un frein fixé à son baudrier, il se laisse glisser le long de la corde en controlant sa vitesse. On s'intéresse au système « grimpeur-baudrier-frein >> 1) Au crayon gris, dessinez le DOI du système. 2) Sur le croquis ci-contre, quelle action mécanique la flèche rouge, modélise-t-elle ? 3) Sur le croquis ci-contre, quelle action mécanique la flèche verte, modélise-t-elle ? 4) Décrivez les caractéristiques principales de la précédente action mécanique : point d'application, sens et direction. 5) Sachant que l'échelle de représentation utilisée est 1cm €350N, quelle est l'intensité de l'action mécanique modélisée par la flèche rouge ? Justifiez votre réponse.

tbh i dont know ether

explanation:

newton's third law, for every action there is an equal and opposite reaction.

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

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.