Answer:
Distance = 10 kilometers.
Explanation:
Given the following data;
Speed = 5km/h
Time = 2 hours
To find the distance traveled;
Distance = speed * time
Distance = 5 * 2
Distance = 10 kilometers
Therefore, the distance travelled by the car is 10 kilometers.
Mass & Height above the ground
Answer:

Explanation:
Given charges are:

The electric potential energy of a charge due to the electric field of another charge is given by

where,
- k = Coulomb's constant, having value =

- r = distance between the charges.
When the charges are infinite distance apart,
,

When the charges are
apart,
,

Here, e is the charge on one electron, such that,
.
Therefore,

Thus,
