If a nai scintillator yields 5000 scintillation photons on average for a single 140 kev gamma ray absorbed via photoelectric effect, approximately how many scintillation photons will be emitted for the imaging photopeaks of in-111 (171 kev and 245 kev)? why is the difference in the number of scintillation photons per energy important?

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?

You can melt ice by applying pressure because the solid/liquid line has a slope.

If a car has a speed of 20 m/s, how long will it take to go 155 m? a. 3100 s b. 135 s c. 2.1 s d. 7.8 s