Spacecraft will be moving in 1700 m/s.
Option C
<h3><u>Explanation:
</u></h3>
The diameter of the moon is 3500 km and the free fall acceleration at the surface is given as 
The radius will be half of the diameter of the moon that can be written as:
By the application of the equation for orbit speed, we get
<span>Use this formula:Wavelength=c/v, where c is the speed of light, and v the frequency.
6.33 X 10^-7=3 X 10^8/v
v=3 X 10^8/6.33 X 10^-7
v=4.74 X 10^14 Hertz,</span>
B. The number of field lines on the source charge.
Answer:
Explanation:
Using Kepler's third law, we can relate the orbital periods of the planets and their average distances from the Sun, as follows:
Where 
and 
are the orbital periods of Mercury and Earth respectively. We have 
and 
. Replacing this and solving for
Given;
redistivity =1.68/100000000W.m
diameter =0.40in
=0.01016m
length =1m
resistance =?
redistivity =resistance×area/lenght
restance=resistivity × length /area
so, resistance =1.6535/1000000 ohmn
