'C' is the correct choice. Please, do me a favor ... take a few minutes to read the other choices, A, B and D, and understand what's wrong with each of those. That's MUCH MUCH more important than knowing that C is correct.
As according to Kepler 's law
T =(4π²r³/ Gm)^1/2
here r= distance from earth center to satellite = 6400km = 6400000m
G = earth's gravitational constant= 6.67×10^-11
m = mass of earth= 5.98 ×10^24
so T =[ { 4× (3.1416)²×(6400000)³}/ {(6.67×10^-11)×( 5.98 ×10^24)} ]^1/2
T= 5133 sec
<span>Seismologists would be your answer. </span>
Answer:
Diverging lens
Explanation:
Given parameters:
Power of lens = -2.0D
Unknown:
Focal length = ?
Solution:
The power of lens is the reciprocal of the focal length;
P =
where f is the focal length
f =
=
The lens is a diverging lens