Why must humans limit their exposure to X-rays and gamma rays?

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong

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.