8. B
9. D
10. C
11. A
12. (called the polor front but there are only 4 definitions??)
Answer:
Helps improve economic condition of people
Explanation:
Mining operations bring jobs which help the local community economy by lowering unemployment and putting more money in the economy
Answer:
the length of pennies will be like the Proxima Centauri
Explanation:
50 pennies make the length of a meter, so :
50 pennies = 1 m
x = 1 km
x= (50 x 1000) = 50 000 pennies = 1 Km
Then if the Avogadro´s number is 6.022 x 1023 so:
50 000 pennies = 1 km
6.022 x 1023 pennies = x
x= (6.022 x 1023/ 50 000) = 1.2044 x 1019
This big number is closer to the 40 trillion km of the Proxima Centauri.
Hope this answer is useful.
Answer:
Monaco has the highest population density Western Europe.
