Answer:
m = 4.51 and n = -5
Explanation:
The average magnetic field strength of the Earth is 0.0000451 T. We need to write the value of magnetic field strength of the Earth in scientific notation. In scientific notation, any value is given by :
.........(1)
Where
m is a real number
n is any integer
Here,
.......(2)
On comparing equation (1) and (2), we get the values as :
m = 4.51 and n = -5
Hence, this is the required solution.
Answer:
29.4 uN
Explanation:
The electric force between two charges can be calculated using Coulomb's Law. According to this law the force between two point charges is given as:
where k is a proportionality constant known as the Coulomb's law constant. Its value is Nm²/C²
r = distance between charges = 70 cm = 0.7 m
q1 = q2 = 4nC = C
The negative sign indicates that the charges are negative. In the formula we will only use the magnitude of the charges.
Using these values in the formula, we get:
Therefore, the magnitude of repulsive force between the given charges will be 29.4 uN