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3 years ago

7

What is the relationship between a magnetic field and a magnetic force?

1 answer:

Lunna [17]3 years ago

8 0

I believe the answer to your question is D. A magnetic force is the effect felt by a magnetic object in a magnetic field.

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3 years ago

How do you write a scale for distance-time graph in physics?

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3 years ago

Read 2 more answers

The blank approach emphasizes the scientific study of observable actions and/or responses and their environmental determinants

lakkis [162]

Answer:

"behavioral" is the right answer.

Explanation:

The behavioral approach would be founded on the principle of generating information thru all the extrapolation as well as the believing which our ecosystem might be what tends to create us to differ greatly as well as experience severe sickness.
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8 0

3 years ago

When a car's starter is in use, it draws a large current. The car's lights draw much less current. As a certain car is starting,

ad-work [718]

Answer:

EMF = 11.35 V

R = 0.031Ω

Explanation:

To find the battery's EMF and the internal resistance we need to use Ohm's law:

$V = IR$

Where:

V: is the voltage

I: is the current

R is the resistance

We have:

The current through the battery is 64.2 A and the potential difference across the battery terminals is 9.36 V:

$\epsilon = V + IR$

$\epsilon = 9.36 V + 64.2A*R$ (1)

When only the car's lights are used, the current through the battery is 1.96 A and the terminal potential difference is 11.3 V:

$\epsilon = 11.3 V + 1.96A*R$ (2)

By solving equation (1) and (2) for R we have:

$9.36 V + 64.2A*R = 11.3 V + 1.96A*R$

$R = \frac{1.94 V}{62.24A} = 0.031 \Omega$

Hence, the internal resistance is 0.031 Ω.

Now, by entering R into equation (1) we can find the battery's EMF:

$\epsilon = 9.36 V + 64.2A*0.031 \Omega$

$\epsilon = 11.35 V$

Therefore, the battery's EMF is 11.35 V.

I hope it helps you!

8 0

4 years ago