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artcher [175]
3 years ago
5

Suppose you are driving in a car. A truck drives past you, traveling in the same direction you are driving. Which statement best

describes how the truck's motion will appear to you?
A. The truck will appear to be traveling faster than it would if you were standing still.
B. The truck will appear to be traveling slower than it would if you were standing still.
C. The truck will always appear to travel twice as fast as it would if you were standing still.
D. The truck will appear to be traveling at the same speed as it would if you were standing still.
Physics
1 answer:
natita [175]3 years ago
4 0
I believe the correct answer is B
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Determine the magnitude of the force between two 42 m-long parallel wires separated by 0.03 m, both carrying 6.3 A in the same d
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Answer:

The magnitude of the force between the two parallel wires is 0.0111 N.

Explanation:

Given;

length of the two parallel wires, L = 42 m

distance between the two wires, r = 0.03 m

current in both wires, I₁, I₂ = 6.3 A

Therefore, the magnitude of the repulsive force between the two parallel wires is given by;

F = \frac{\mu_0 I_1I_2l}{2\pi r}\\\\where;\\\mu_0 \ is \ permeability \ of \ free \ space = 4\pi *10^{-7} \ T.m/A \\\\F = \frac{(4\pi *10^{-7})(6.3)^2(42)}{2\pi (0.03)}\\\\F =   0.0111 \ N

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