The centripetal force needed to keep earth in orbit is gravity.
The total amount of energy per hour is
Explanation:
In this problem we are told that the amount of energy reaching a square meter in the United States per hour is
The total surface area of the United States is
And converting into squared metres,
Therefore, the total energy reaching the entire United States per hour is given by:
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Answer:
a) Yes, there are shakes in a second () in a year there are 31,536,000 seconds... that is 3.1536x ()
b) Note that the defined universe day will have 60*60*24=86400 universe seconds if the seconds are defined as normal seconds.
Also one universe day (or 86400 universe seconds) is equivalent to 1010 years. Now using a rule of three we can know the seconds that humans have existed.
That is about 2 and half hours.
Answer:
body will stop moving if the gravity will be equal to the tension produced in the string so both the forces will cancel the influence of each other leading to the state when the body is in equilibrium