Explanation:
We have, a pendulum on a planet, oscillates with a time period 5 sec. The formula used to find the time period is given by :

l is length of the pendulum
g is acceleration due to gravity on which it is placed
It is clear that, the time period of pendulum is independent of the mass. Hence, if the mass is increased six times, its time period remains the same.
Answer:
1)
The total work done by outside force is 
2)
The total work done by the electric field is 
3)
The potential energy of the two sphere system is 
4)
The magnitude of the acceleration of sphere A is 
5)
The magnitude of the acceleration of sphere B is 
6)
The magnitude of velocity sphere A after a very long time is
\
7) The magnitude of velocity sphere B after a very long time is 
Explanation:
The explanation is shown on the first and second uploaded image
Answer:
The correct option is;
C. 1 mile clear of clouds
Explanation:
Given that the indicated airspace location is at or below 700 feet AGL therefore, it is taken as being in the region of a class G airspace which covers the airspace regions from the base up to and equal to 1,200 feet beneath the class E airspace and the requirement for VFR flight for class G are 1 mile and clear of clouds.
The correct answer is a blackhole.
A blackhole is the only object in which nothing, not even light can escape.
Hope this helps!