In this case, you need the formula below where:
F = force
k = coulombs constant 8.99 x10^{9} N.m^{2} . C^{-2}
q1 = electric charge 1
q2 = electric charge 2
r = the distance between the charges

pls note: make sure your units are correct (in meters etc, not fm (<em>femto-meters</em>)).
Curiously, this question doesn't tell you what atom you are next to the nucleus of. Different numbers of protons in the nucleus of the atom will make for vastly different forces in your answer...
Answer:
Explanation:
Average velocity is found in the total displacement experienced in the trip divided by the total time it took to make this trip. If, for the first 2.0 hours, the car travels at 60 km/hr, then in 2.0 hours the car can travel 120 km; if it then travels for 3.0 at 85 km/hr, it can travel 255 km in the same direction. The total time this took was 5.0 hours. So doing the math and rounding correctly by following the rules for the adding and subtracting of sig fig's:

If you do not round when you add, the average velocity is 75 km/hr
Answer: Letter X in the diagram represent the angle of incidence
Explanation: One of the properties of wave is reflection. But before reflection can occur, there must have been a directed motion of wave particle towards a plane surface. The angle of incidence is the angle between the direction of motion of the wave particle ( for example; light) and the normal to the plane surface.
Answer:
Average around 75
Explanation:
It's the average age. You don't really always die of old age but it is 75 years of age.
Answer:
v = 24.5 m
Explanation:
Average speed is defined as
v = (
- x₀) / t
The distance is
x = v t
In this case we can find the speed
v = (v_nort ¾ t + v_sud ¼ t) / t
v = 45 ¾ - 37 ¼
v = 24.5 m