The mechanical energy of an object is equivalent to the sum of its potential and kinetic energy. If the helicopter is grounded, then its mechanical energy will be 20 J. If it is in the air, then its potential energy will be calculated using:P.E = mghAnd then added to the kinetic energy to obtain mechanical energy.
The planet's mass in kilograms are 
b.
<u>Explanation:</u>
Given:
Mass of Neptune = 
milligrams
The mass in Kg = 1 milligram
Then the the planet's mass in kilograms will be:
The planet's mass in kilograms are .
Answer:
C. They wanted more economic opportunity
B. they were fleeing from religious persecution
Explanation:
Fleeing crop failure, land and job shortages, rising taxes, and famine, many came to the U. S. because it was perceived as the land of economic opportunity. Others came seeking personal freedom or relief from political and religious persecution.
A- Americans built up personal debt by using credit to pay for things.
Answer:
B
Explanation:
It says first football game on thanksgiving but that’s it
