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3 years ago

Light is shining in the images. Which object reflects a lot of light, absorbs a little light, and transmits almost no light?

Physics

2 answers:

SVEN [57.7K]3 years ago

6 0

I believe it is B, the object that reflects a lot of light, absorbs a little light, and transmit almost no light.

Kazeer [188]3 years ago

3 0

The correct answer to the question is: Object B.

EXPLANATION:

Before going to answer this question, first we have to understand the reflection coefficient, transmission coefficient and absorption coefficient.

The reflection coefficient ( r )of an object is the ratio of energy reflected to the total energy incident on the object.

The absorption coefficient ( a ) of an object is defined as ratio of amount of energy absorbed to the amount of energy incident on it.

Similarly, the ratio of amount of energy transmitted to the total amount of energy incident is called transmission coefficient ( t ).

We know that a + r + t = 1

If a = 0 and t = 0, the reflection coefficient r = 1.

The body having reflection coefficient approximately equal to one will reflect a lot of light, absorbs a little light, and will transmit almost no light.

As per options given in the question, the body B is more polished and shining. Hence, its reflection coefficient is more as compared to transmission and absorption coefficient.

Hence, the answer of the question is object B.

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Alex_Xolod [135]

Answer:

its c

Explanation:

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3 years ago

Things you can do with an environmental engineering major and a broadcasting minor?

Vika [28.1K]

Answer:

With an Environmental Engineering and a broadcasting minor

You can work as an On Air personality that host programs that provide your audience with documentaries about the environments and project carried out by Environmental Engineer

and also you can work as a journalist that explore the world making research that will preserve the environment and leveraging the media as a broadcaster to provide this research findings as a video for you audience

Explanation:

In order to get a better understanding let define some terms

Environmental Engineer :

Environmental engineers resolve and help prevent environmental problems. They work in many areas, including air pollution control, industrial hygiene, toxic materials control, and land management. The duties of an environmental engineer range from planning and designing an effective waste treatment plant to studying the effects of acid rain on a particular area. An environmental engineer is sometimes required to work outdoors, though most of her work is done in a laboratory or office setting. Career opportunities for environmental engineers exist in consulting, research, corporate, and government positions.

Broadcasting:

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7 0

3 years ago

A pressure of 400 Pa is applied to an area of 2.5 m2.What force applies this pressure?

Irina-Kira [14]

F = 400 Pa x 2.5 m2
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4 0

3 years ago

A machine is designed to fill jars with 16 ounces of coffee. A consumer suspects that the machine is not filling the jars comple

babunello [35]

Answer:

a) Null hypothesis: $\mu \geq 16$

Alternative hypothesis : $\mu$

b) $t=\frac{15.6-16}{\frac{0.3}{\sqrt{8}}}=-3.77$

$p_v =P(t_{(7)}$

If we compare the p value and the significance level given $\alpha=0.1$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis.

c) We can conclude that the mean is significantly less than 16 ounces at 10% of significance. so then the consumer suspect is correct.

Explanation:

Data given and notation

$\bar X=15.6$ represent the mean for the sample

$s=0.3$ represent the sample standard deviation

$n=8$ sample size

$\mu_o =16$ represent the value that we want to test

$\alpha=0.1$ represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

Is a one tailed left test.

What are H0 and Ha for this study?

Null hypothesis: $\mu \geq 16$

Alternative hypothesis : $\mu$

The degrees of freedom on this case are:

$df=n-1=8-1=7$

Compute the test statistic

The statistic for this case is given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$t=\frac{15.6-16}{\frac{0.3}{\sqrt{8}}}=-3.77$

Give the appropriate conclusion for the test

Since is a one side left tailed test the p value would be:

$p_v =P(t_{(7)}$

Conclusion

If we compare the p value and the significance level given $\alpha=0.1$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis.

We can conclude that the mean is significantly less than 16 ounces at 10% of significance. so then the consumer suspect is correct.

3 0

3 years ago

Scientists are constantly exploring the universe, looking for new planets that support life similar to the life on

Molodets [167]

The answer would be “B” because humans would need water, protection from radiation so we don’t melt or burn to death lol, and a gaseous atmosphere because we would need oxygen.

6 0

3 years ago

Read 2 more answers