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3 years ago

Which of the following is an example of a scale on a map?

Physics

1 answer:

azamat3 years ago

3 0

" 1:12,000 " is an example of a scale on a map. (choice-A)

It tells you how many units of distance in the real world are represented by one unit of distance on the printed map.

For example, if the scale of the map is 1:12,000 , then one inch on the map represents 12,000 inches (1,000 feet) of distance in the real world that the map describes.

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With the switch open, roughly what must be the resistance of the resistor on the right for the current out of the battery to be

jeyben [28]

Question:

Assumptions

Voltage of battery = 24 V

Resistance on the right,20Ω parallel to 10 Ω resistor

Answer:

For the current out of the battery to be the same as when the switch was opened with the switch closed, the resistance on the resistor on the right must be approximately 20/3 Ω

Explanation:

We note that the switch in the assumption is on the same line as the 20 Ω resistor.

With a voltage of 24 V, and the switch closed, we have;

Total resistance = $\frac{1}{\frac{1}{10} +\frac{1}{20} } = \frac{20}{3} \Omega$

Current out of voltage, I = Voltage/(total resistance)

= 24 ÷ 20/3 = 24 × 3/20 = 18/5 A

Therefore, with the switch opened, we get

Resistance on the right = Initial total resistance $= \frac{20}{3} \Omega$

Therefore, with the switch opened, the resistance on the resistor on the right must be approximately equal to the resultant resistance of the two resistances in parallel.

6 0

3 years ago

How can you convert a temperature expressed in degrees celsius to kelvin?

ozzi

By subtracting the value of absolute zero, also know as adding 273.15!

8 0

4 years ago

Read 2 more answers

Which statement best describes beaches? Beaches change over time as waves move further up the shore. Beaches are always changing

NemiM [27]

Answer:

I think the 1st statement is right.

Explanation:

Wind patterns doesn't stay the same.

Waves don't follow the same patterns.

Waves move further up the shore.

I didn't hear about "waves adding" before..so i guess 1st statement is right.

3 0

3 years ago

To increase the frequency by 4 octave(s), to 16f0, by what factor would you have to decrease the length?

gayaneshka [121]

Answer:

= 16 , length will be decreased by a factor of 16

Explanation:

One octave apart corresponds to twice the frequency and thus half the length. Two octaves apart will correspond to 4 times the frequency and the length will be reduced by a factor of 4, that is 1/4 of the length.
Three octaves apart on the other hand corresponds to 8 times the frequency, thus length will be decreased by a factor of of 8, that is 1/8 of the length .
Four octaves apart corresponds to 16 times the frequency, therefore the length will be decreased by a factor of 16, that is 1/16 of the length.

4 0

4 years ago

Consider the image above. Vi = the initial velocity and Vf = the final velocity. Is there acceleration? Explain your answer.

lutik1710 [3]

<span><span>Velocity is a vector, and the initial and final ones are in opposite directions.
There must have been acceleration in order to change the direction of motion.</span>

A) No. The initial and final velocities are the same.
This is all wrong, and not the correct choice.
It's "Yes", and the initial and final velocities are NOT the same.

B) Yes. The ball had to slow down in order to change direction.
This is poor, and not the correct choice.
The "Yes" is correct, but the explanation is bad.
Acceleration does NOT require any change in speed.

C) No. Acceleration is the change in velocity. The ball's velocity is constant.
This is all wrong, and not the correct choice.
It's "Yes", there IS acceleration, and the ball's velocity is NOT constant.

D) Yes. Even though the initial and final velocities are the same, there is a change in direction for the ball.
This choice is misleading too.
The "Yes" is correct ... there IS acceleration.
The change in direction is the reason.
The initial and final velocities are NOT the same. Only the speeds are.
</span>

3 0

3 years ago

Read 2 more answers