Answer:
first number is the correct answer
Answer:
Option (A)
Explanation:
Radioactivity is defined as a process in which an unstable atomic nucleus decays continuously and after a specific period of time changes into a much more stable element. During this time of decay, the nucleus emits charged particles (energy) which are known as the α, β and γ particles. These are often emitted in the form of electromagnetic energy and are very dangerous to health.
The radioactive elements decay at a certain rate which is commonly known as the half-life. Half-life is basically defined as the time required by a radioactive substance to decay half of its initial composition.
Thus, the correct answer is option (A).
Answer:
Ur answer is B. I, II, and III
Explanation:
Tectonic plates can interact with each other.
Answer:
It depends on the objects mass, the gravitational pull when up or down slopes, and the height of the reference point
