is the period of orbit.
<u>Explanation:
</u>
The equation that is useful in describing satellites motion is Newton form after Kepler's Third Law. The period of the satellite (T) and the average distance to the central body (R) are related as the following equation:

Where,
T is the period of the orbit
R is the average radius of orbit
G is gravitational constant 
Here, given data


Substitute the given values, we get T as



Taking square root, we get

Answer:
Final displacement with respect to the starting position is 832.37 meter
Explanation:
Lets consider that the orienteer start to run on the point of (0,0) point of a coordinate system. When he runs towards to east side about 400m, he will be at the point A(400,0). After he runs to the northeast (at a 45 degree angle from due east and from due north), approximately he will make 353.55 meter to east and 353.55 meter to the north side and he will be at the point of B(753.55, 353.55)
From the starting point total displacement will be 832.37 meter. Please check the attached graphical solution.
The atom is neutral because the number of protons is equal to number of electrons in which they cancel the charges of each other and the arom becomes neutral
The sound gets louder, like hitting a metal pole on a thin metal beam, the energy increases as the sound does.