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3 years ago

If a car used 260,000 W of power to complete a race in 15 s, how much work did the car do?

Physics

1 answer:

suter [353]3 years ago

3 0

Answer: 3.9 MW

Explanation:

1 W = 1 J/s

260000 J/s (15 s) = 3,900,000 = 3.9 MW

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Explain how the first three steps of scientific inquiry are related.

Mademuasel [1]

<span>The first three steps in scientific inquiry are related in that they are all equivalent to being on a fact finding mission. The three steps are to find or develop the question that must be answered, to study all related academic literature on the subject, and then to make a guess as to what the answer is.
I hoped I helped!</span>

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3 years ago

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An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle

Dovator [93]

Answer:The velocity of the train is 3.84m/s

Explanation:

According to the Doppler effect, if the source is moving towards you then the apparent frequency of the sound emitted by the source is higher and if the source is moving away from you then the apparent frequency of the sound emitted by the source is smaller.

This is given by:

fo = V +-Vo/ V +-Vo × source

Where fo= observed frequency

V= velocity of sound

Vo= vo it of the observer

fsource= frequency the source

Given:

Observed frequency of the approaching train fo1= 452Hz

The observed frequency of train= fo2= 442Hz

Velocity of sound= 334m/s

Velocity of source=?

Train approaching the observer is given by:

fo1= V/(V - Vs)× source ...eq1

Train passes the student is given by:

fo2= V/(V - Vs)×source ...eq2

Divide eq1 by eq2

452/442 = (343+Vs)/(343 - Vs)

1.02 =(343+Vs)/(343 -Vs)

Cross multiply

1.02(343- Vs) = 343 + Vs

350.76 - 1.02Vs = 343 + Vs

Collecting like terms

350.76 -343= 1.02Vs+ Vs

7.76 = 2.02Vs

Vs= 7.76/2.02

Vs= 3.84m/s

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How would the word texting be re arragned in modification

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4 years ago

Which planet has a storm called the Great Dark Spot swirling in its atmosphere?

Viktor [21]

Im thinking D. Neptune..

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4 years ago

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In the roman soldier model for refraction, a muddy stream crosses the road they are on walking on at 45. Will the soldiers in th

Mamont248 [21]

There are different refractive errors that are common and some of them are:

Nearsightedness (myopia) makes far-away objects look blurry.
Farsightedness (hyperopia) makes nearby objects look blurry.
Astigmatism can make far-away and nearby objects look blurry or distorted.
Presbyopia makes it hard for middle-aged and older adults to see things up close

<h3>What is Refraction?</h3>

This refers to the study of light phenomena that deflects when it passes through a medium in an oblique manner to another medium of a varying density.

Hence, we can see that there are everyday examples of refraction in simple terms which occurs and some of them are:

Glass
Human eyes
Ice crystals
Pickle jar
Microscope, etc.

Hence, we can see that your question is incomplete, so I gave you a general overview to help you get a better understanding of the concept of refraction.