What is measured by the amount of time a muscle group can sustain a contraction? A. Muscular endurance B. Muscular strength C. Cardiovascular fitness. D. All of the above

An asteroid is discovered in a nearly circular orbit around the sun, with an orbital radius that is 2.47 times earth's. what is the asteroid's orbital period, its "year," in terms of earth years?

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?