The apollo program (not the lunar missions with astronauts) being conducted at the apache point observatory uses a 3.5-m telescope to direct lasers at retro-reflectors left on the moon by the apollo astronauts. if the moon is 384,472 km away, approximately how long do the operators need to wait to see the laser light return to earth?

Abearing is designed to a reduce friction b. support a load c.guide moving parts such as wheels, shafts and pivots d. all of the above

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?

When electrons are added to the outermost shell of a carbon atom, it forms--an anion that has a larger anion that has a smaller cation that has a larger cation that has a smaller radius.