You would need friction and force to move the plates and most likely a strong machine.
Answer:
b. measuring the pulsations of the Sun from stations around the world.
Explanation:
The Global Oscillation Network Group (GONG) is a community-based program that wants to conduct a detailed study of the internal structure of the sun by using helioseismology. GONG relies on a team of six observatories around the world to perform its work. One of the duties of GONG is to measure the pulsations of the Sun from six stations located all over the world.
Answer:..What kind of rocks are found by coal? Coal is a sedimentary rock.
What kind of rocks are found by copper?Copper minerals and ores are found in both igneous and sedimentary rocks.
Explanation:What kinds of rocks are found by salt?Halite

; to find the length of the hypotenuse, you have to use the pythagorean theorem, which states that, in a right triangle,

.

and

would be the two legs, while

would be the hypotenuse. You need to plug in the values of the legs as

and

:

. Solve for the squares of the two numbers, resulting in

, and ultimately

. Find the square root of

and

, and you get

.