In which of the Earth's layers are diamonds formed? -
Diamonds form in the Earth's mantle, a thick layer between the thin crust and Earth's metal core.
Answer:
25.1%
Explanation:
Let's say m is the true weight and M is the weight of the counterweight.
The original distance between the pans and the center is 25.1 cm / 2 = 12.55 cm. The fulcrum is then moved 1.4 cm towards the counterweight.
Sum of the moments about the fulcrum:
m (12.55 + 1.4) − M (12.55 − 1.4) = 0
13.95 m − 11.15 M = 0
13.95 m = 11.15 M
M / m = 13.95 / 11.15
M / m = 1.251
The true weight is being marked up by 25.1%.
Non-metals in general are poor conductors of electricity.
<span>The elements generally regarded as nonmetals are: </span>
<span>hydrogen (H) </span>
<span>In Group 14: carbon (C) </span>
<span>In Group 15: nitrogen (N), phosphorus (P) </span>
<span>Several elements in Group 16, the chalcogens: oxygen (O), sulfur (S), selenium (Se) </span>
<span>All elements in Group 17 - the halogens </span>
<span>All elements in Group 18 - the noble gases </span>
<span>Phosphorus, sulphur and chlorine are poor conductors as " the outer electrons are not free to move and carry charge because they are held strongly in covalent bonds."</span>