The characteristic being calculated here is the mean or the average of the data set.
To check:
(20.73 + 20.76 + 20.68 + 20.75)/4 [we divide it by 4 because there are 4 numbers]
= 82.92 / 4
= 20.73
This at be due to a chemical change. For example, when some chemical elements mix, the change causes heat. This is the same, but the opposite. Hope this helps!
Answer:
Explanation:
1. Calculate the volume of the unit cell
V = l³ = (2.866 × 10⁻⁸ cm)³ = 2.354 × 10⁻²³ cm³
2. Calculate the mass of a unit cell

3. Calculate the mass of one atom
A body-centred unit cell contains two atoms.

Answer:
the population of grasshoppers will decrease
Explanation:
a food source is becoming more and more limited thus, its predator will also start to die out due to starvation
The correct answer is D because the the rest will have different answers depending on the person you ask. D can be proven with facts by research