Aclosed organ pipe and an open organ pipe of same length produce 2 beats/second while vibrating in their fundamental modes. the length of the open organ pipe is halved and that of closed pipe is doubled. then, the number of beats produced per second while vibrating in the fundamental mode is (a) 8 (b) 7 (c) 2 (d) 6 what equation use

The ozone hole appears in antarctica during

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?

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?