Acement factory emits 900 kilograms of co2 to produce 1,000 kilograms of cement. a fully grown tree removes six kilograms of co2 per day from the air. one acre of land can support 200 mature trees. a company builds a factory that will produce 100,000 kilograms of cement. to make the factory carbon neutral, the owners need to grow trees over an area of land measuring acres.

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?