Answer:
Alpha is the least penetrating radiation listed below.
Gamma is the most penetrating radiation in the given list.
These rays can be used to detect cancer, sterilizing the medical instrument, smoke detector, etc.
Radiation emitted from the radioactive elements also have very harmful. They affect the living being a lot. Waste from the nuclear reactor also contains harmful radiation which causes Land pollution if not disposed of properly.
The answer is d. experiment
Answer:
The distance traveled by the faster car when it is 15 mins ahead of the slower car is 165 miles.
Explanation:
Given;
speed of the faster car, v₁ = 60 mi/h
speed of the slower car, v₂ = 55 mi/h
Let the distance traveled by the faster car when it is 15 mins ahead of the slower car = x miles

Note: divide 15 mins by 60 to convert to hours for consistency in the units.

Therefore, the distance traveled by the faster car when it is 15 mins ahead of the slower car is 165 miles.
It's B because when you throw something it doesn't go up it slowly descends downward