Force = 9x10^9 x (6x10^-7 x 6x 10^-7) / (.5)^2
= 0.013 N
Using the formula;
F = 9x10^9 x (Q1 x Q2) / r^2
Answer:

Explanation:
Given that,
The length of a simple pendulum, l = 2.2 m
The time period of oscillations, T = 4.8 s
We need to find the surface gravity of the planet. The time period of the planet is given by the relation as follows :

Put all the values,

So, the value of the surface gravity of the planet is equal to
.
Asteroids are too small to have atmospheres
The basic relationship between frequency of an electromagnetic wave and wavelength of the wave is

where

is the speed of light.
Manipulating the equation, we can rewrite it as

The frequency of the wave in our problem is

so if we use the previous formula, we find the correspondant wavelength:
Train has the most momentum if they were all traveling 50 mph
<u>Explanation:</u>
- A train can have the most momentum even if it is moving slowly because it has a large mass if they were all traveling 50 mph.
- In simple words, momentum can be described as the amount of motion of a moving body, estimated as a product of its mass and velocity.
- <u>Momentum= mass x velocity</u>
<u></u>
<u></u>
<u />