Answer: 16N
Explanation:
According to Coulomb's law, the force existing between two charges is directly proportional to the product of their charges and inversely proportional to the distance between the charges. Mathematically,
F = kq1q2/r²
Where F is the force between them
q1 and q2 are the charges
r is the distance between them.
If the force between them is 10N, the formula becomes;
10 = kq1q2/r²... (1)
If the distance between them is now halved, the force will become
F = kq1q2/(r/2)²
F = kq1q2/(r²/4)
F = 4kq1q2/r² ... (2)
Dividing equation 1 by 2 we have;
4/F = (kq1q2/r²)÷ (4kq1q2/r²)
4/F = kq1q2/r²×r²/4k1q1q2
4/F = 1/4
Cross multiplying we have;
F = 4×4
F = 16N
Therefore the new force between the charges is 16N
Answer:
The final velocity of the car is 26.65 m/s.
Explanation:
Given;
acceleration of the racecar, a = 6.5 m/s²
initial velocity of the car, u = 0
time of motion, t = 4.1 s
The final velocity of the car is given by;
v = u + at
where;
v is the final velocity of the car
suvstitute the givens
v = 0 + (6.5)(4.1)
v = 26.65 m/s.
Therefore, the final velocity of the car is 26.65 m/s.
<span>The following that describes the intercepts on the graph is "The initial velocity of the runner was 4 m/s, and the runner stopped after 8 seconds." It is because the starting point of the line is at 4 and then the ending point is at 8.
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Answer:
Neutrons
Explanation:
Neutrons are subatomic particles that are electrically neutral and possess no charge in them.
Answer:
energy is the capacity or ability to do work
its si unit is joule