Answer:in X-rays
Explanation:
Radiation are used in X-rays for the treatment of tumours, and some skin diseases,cancer cells can be destroyed by X-rays
Answer:
4000m/s
Explanation:
It would be this because sound travels faster through a solid rather than a liquid.
If the force and the motion are along the same direction (like it is here) then work is force*distance. The time doesn't come into play until you want the power used. So here
W=9.0*3.0=27J
