The planet Krypton has a mass of 8.4 x 1023 kg andradius of 3.4 x 106 m.
What is the acceleration of an object in free fall near thesurface of Krypton? the gravitational constant is 6.6726 x10-11 N x m2 /kg2 . Ans. in unitsof m/s2 .

Which of the following energy forms are invovled in a nuclear power plant ? heat ,sound , electrical , nuclear ,mechanical

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called