What would be the projectile's initial speed?

Ineed extreme for task 2. my student number is 571721. many to whoever solves this correctly, im in debt to you.

What type of nuclear decay causes the atomic number of an element to increase by 1?

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.