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AURORKA [14]
3 years ago
10

What is Newton's universal law of gravitation

Physics
1 answer:
quester [9]3 years ago
6 0

Answer:

an object that is in motion wont go out of motion until there is another force pushing on it

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PSYCHOLOGY. neurons communicate with each other through ____
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B. Nueral Receptors

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Two long parallel wires 40 cm apart are carrying currents of 10 A and 20 A in the opposite direction. What is the magnitude of t
Alex_Xolod [135]

Answer:

The magnitude of the magnetic field halfway between the wires is 3.0 x 10⁻⁵ T.

Explanation:

Given;

distance half way between the parallel wires, r = ¹/₂ (40 cm) = 20 cm = 0.2 m

current carried in opposite direction, I₁ and I₂ = 10 A and 20 A respectively

The magnitude of the magnetic field halfway between the wires can be calculated as;

B = \frac{\mu _oI_1}{2 \pi r} + \frac{\mu_oI_2}{2\pi r}

where;

B is magnitude of the magnetic field halfway between the wires

I₁ is current in the first wire

I₂ is current the second wire

μ₀ is permeability of free space

r is distance half way between the wires

B = \frac{\mu_o I_1}{2\pi r} + \frac{\mu_o I_2}{2\pi r} \\\\B = \frac{\mu_o }{2\pi r} (I_1 +I_2)\\\\B = \frac{4\pi *10^{-7} }{2\pi *0.2} (10 +20) = 3.0 *10^{-5}\  T

Therefore, the magnitude of the magnetic field halfway between the wires is 3.0 x 10⁻⁵ T.

5 0
3 years ago
A person riding on the roof of a freight train throws a ball forward. (a) If we ignore air drag and relative to the ground, is t
mina [271]

Answer:

Explanation:

A ball is thrown in forward direction by a person who is riding on the roof of the moving train.

-->If you neglected the air drag and relative to the ground, then the velocity of the ball is equal to the sum of the velocities of ball and the train.

-->Hence, the ball is moving faster.

-(b) Relative to the freight car, the ball moves at the same speed irrespective of train

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3 years ago
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