AWARDING BRAINLIEST Suppose 100 radioactive atoms have a half-life of 10 seconds. Approximately how many radioactive atoms will be left after 20 seconds?

50
12.5
25
75

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

If you divide a speed in miles per minute by 60, you get the same speed expressed in miles

By definition a socially healthy person has access to clean water in adequate living space and makes an effort to recycle