There are no rules that describe how positive energy behaves
in the presence of negative energy, because there is no such
thing as negative energy.
(Wellll ... in pop Psychology, perhaps, but not in any real science.)
Answer:
0.3967mg of sodium-24 are left
Explanation:
If the half life of radioactive element (which is sodium-24 here) is , then at the end of this time the number of atoms in the sample will become half i.e. 1/2 .
if the original amount of atoms is N°. The formula for calculating the remaining atoms (N) left in the sample after t half lives would be:
Here, in this question,
Given amount of sodium-24 = N° = 13 grams
Half life of sodium-24 = t = 15
and Remaining amount of sodium after 45 hours = N = ?
Therefore, using the given Forumla:
Answer:
Inhibit the flow of electrons
Explanation:
An electric current usually consists of electrons moving through a wire.
An insulator prevents the flow of an electric current, so it inhibits the flow of electrons.
The Tonga Trench is located at the tectonic boundary between the Pacific Plate and the Indian-Australian Plate.
It is an Oceanic trench that is located in the south-west Pacific Ocean. It is actually the deepest trench of the southern Hemisphere and the second deepest on Earth.
Kevin is a unit used to measure temperature