Aprojectile of mass 0.75 kg is shot straight up with an initial speed of 18 m/s. a) use the work-energy theorem to calculate the maximum height of the projectile under the assumption of negligible air resistance. now consider the same projectile, under the same assumption of negligible air resistance, instead shot at 18 m/s at an angle above the horizontal. b) will the new maximum height be greater than, less than, or equal to the height calculated in (a)? justify your answer. e) define k, as the kinetic energy of the projectile at its highest point when launched straight up; define k2 as the kinetic energy of the projectile at its highest point when launched at angle d which is larger? choose one and justify your answer. ok is equal to k which is greater depends whether the angle of launch is greater or less than 45 ) when the experiment is actually performed by shooting the projectile straight up, the projectile rises to a maximum height of only 12 m. i. is the absolute value of the work done by air resistance greater ii. calculate the average force of air resistance on the ball than, less than, or equal to the initial kinetic energy of the projectile? justify your answer.

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