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2 years ago

Which statement correctly describes the formation of electric current?

Physics

1 answer:

Semenov [28]2 years ago

4 0

Answer:

b. A voltage causes electric charges to move from lower to a higher potential.

Explanation:

As we know, current flows from high voltage to low voltage and the electric charge flows opposite to the direction of the current. That is why we can say that the electric charge flows from low voltage to high voltage.

Resistance does not cause the electron to flow from low voltage to high voltage.

Therefore the answer is b.

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A ground-fault circuit interrupter is a (an) _____. A)wire that provides an easier path for a current to take if a short circuit

AlladinOne [14]

The answer would be B. It's really a circuit breaker but it works by comparing the amount of electrical current going to and returning from the item.

5 0

2 years ago

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A 2020 kg car traveling at 14.2 m/s collides with a 2940 kg car that is initally at rest at a stoplight. The cars stick together

velikii [3]

Answer:

The answer is 3,064x $e^{-4}$

Explanation:

When the collision happens, the momentum of the first car is applied to the both of them.

So we can calculate the force that acts on both cars as:

The momentum of the first car is P = 2020 kg x 14.2 m/s = 28,684 kg.m/s
The acceleration of both cars after the crash is going to be a = P / mtotal which will give us a = 28,684 / (2020+2940) = 5.78 m/s
Since the second car was initially not moving, the final acceleration was calculated with the momentum of the first car.

Now we can find the force that acts on both of them by using the formula F = m.a which will give us the result as:

F = (2020+2940) x 5.78 = 28,684

The friction force acts in the opposite direction and if they stop after moving 2.12 meters;

Friction force is Ff = μ x N where μ is the friction coefficient and the N is the normal force which is (2020+2940) x 10 if we take gravitational force as 10, equals to 49,600.
F - Ffriction = m x V
28,684 - μ x 49,600 = 4960 x 5.78
μ = 3,064x $e^{-4}$

4 0

3 years ago

How does south African law ensure that people who are living with HIV/AIDS are not discriminated against

Svetach [21]

The African law ensures that people who are living with HIV/AIDS are not discriminated by the society by emphasizing that they must be protected by the law and enjoy the rights like those people in good conditions. It is in their Bill of Rights that people with HIV/AIDs are not forced to tell others about their status instead they have to enjoy their right to privacy and confidentiality.

7 0

2 years ago

Im pregnaunt at the age 12 what shall i do now ??<br><br> i do live my belly bump<3

Alex

Answer:

theoretically speaking I don't even wanna believe it's possible but if it does then then you should check for abortion

8 0

2 years ago

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Consider as a system the Sun with Saturn in a circular orbit around it. Find the magnitude of the change in the velocity of the

Doss [256]

Answer:

$v_{su} = 19.44 m/s$

Explanation:

$m_{su}=5.68x10^{29}kg\\m_{sa}=5.68x10^{26}kg$

$T=9.29x10^8\\r_{o}=1.43x10^{12}$

If the sun considered as x=0 on the axis to put the center of the mass as a:

$m_{su}*r_{o}=(m_{sa}+m_{su})*r_{1}$

solve to r1

$r_1=\frac{m_{sa}*r_{o}}{m_{sa}+m_{su}}=\frac{5.68x10^{26}*1.43x10^{12}}{5.68x10^{26}+5.68x10^{26}}$

$r_1=1.428x10^9m$

Now convert to coordinates centered on the center of mass. call the new coordinates x' and y' (we won't need y'). Now since in the sun centered coordinates the angular momentum was

$L = \frac{m_{sa}*2*pi*r_1^2}{T}$