What is the escape speed (in km/s) from an earth-like planet with mass 6.5e+24 kg and radius 55.0 × 105 m? use the gravitational constant g = 6.67 × 10-11 m3 kg-1 s-2.

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?

Need only answer if you think you know it

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c