If a person's goal is to increase his or her overall fitness, which is the most important factor: the specific areobic exercise a person does or the intensity of the exercise? Defend your response

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Gas cloud 1 is likely to form a star. gas cloud 2 is not. based on this information, match the given conditions with each cloud

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?