Physics, 21.03.2020 11:34 user1234536
A hand lifts a block vertically upward at constant velocity. The work done by gravity on the block if the system consists of the block only. The work done by gravity on the block if the system consists of the block and the earth. AND WHY?
1. is zero, is zero2. is zero, is negative3. is zero, is positive4. is negative, is negative5. is positive, is positive
Answers: 2
Physics, 22.06.2019 02:30
Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.
Answers: 1
Physics, 22.06.2019 11:40
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?
Answers: 3
A hand lifts a block vertically upward at constant velocity. The work done by gravity on the block...
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