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labwork [276]
2 years ago
6

What mass of water can be heated from 250c to 500c by the addition of 2825 j? specific heat of water = 4. 18 j/g/k.

SAT
1 answer:
Anna [14]2 years ago
4 0

Answer:

400

Explanation:

I like it this should be it

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Write your fortnite username in the comments if you want to try out for my clan
stepan [7]
אתה יודע מה?
не мислим да нећу :)
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2 years ago
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Find the residual values, and use the graphing calculator tool to make a residual plot.
finlep [7]

Answer:

  • No, the points are evenly distributed about the x-axis.

Explanation:

<u>1. Write the table with the data:</u>

  x      given     predicted       residual

  1       - 3.5         - 1.1

  2      - 2.9           2

  3       - 1.1            5.1

  4        2.2           8.2

  5        3.4           1.3

<u>2. Complete the column of residuals</u>

The residual is the observed (given) value - the predicted value.

  • residual = given - predicted.

Thus, the complete table, with the residual values are:

  x      given     predicted       residual

  1       - 3.5         - 1.1                 - 2.4

  2      - 2.9           2                  - 4.9

  3       - 1.1            5.1                - 6.2

  4        2.2           8.2               - 6.0

  5        3.4           1.3                   2.1

<u>3. Residual plot</u>

You must plot the last column:

  x      residual

  1       - 2.4

  2      - 4.9

  3       - 6.2

  4       - 6.0

  5        2.1

See the plot attached.

<em>Does the residual plot show that the line of best fit is appropriate for the data?</em>

Ideally, a residual plot for a line of best fit that is appropiate for the data must not show any pattern; the points should be randomly distributed about the x-axis.

But the points of the plot are not randomly distributed about the x-axis:  there are 4 points below the x-axis and 1 point over the x-axis: there are more negative residuals than positive residuals.  This is a pattern. Also, you could say that they show a curve pattern, which drives to the same conclusion: the residual plot shows that the line of best fit is not appropiate for the data.

Thus, the conclusion should be: No, the points have a pattern.

  • 1. "<em>Yes, the points have no pattern</em>": false, because as shown, the points do have a pattern, which makes the residual plots does not show that the line of best fit is appropiate for the data.

  • 2. "<em>No, the points are evenly distributed about the x-axis</em>": true. As already said the points have a pattern. It is a curved pattern, and this <em>shows the line of best fit is not appropiate for the data.</em>

  • 3. "<em>No, the points are in a linear pattern</em>": false. The points are not in a linear pattern.

  • 4. "<em>Yes, the points are in a curved pattern</em>": false. Because the points are in a curved pattern, the residual plot shows that the line of best fit is not appropiate for the data.

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A 0. 75-kg ball is attached to a 1. 0-m rope and whirled in a vertical circle. The rope will break when the tension exceeds 450
8090 [49]

At the bottom of the circle, the ball is being pulled upward by tension in the rope and downward by its own weight, so that the net force on it is

∑ F = 450 N - (0.75 kg) g = (0.75 kg) a

where a is centripetal acceleration. At this maximum tension, the ball has a maximum centripetal acceleration of

a = (450 N - (0.75 kg) g) / (0.75 kg) = 590.2 m/s²

Then its maximum tangential speed v is such that

a = v² / (1.0 m)

⇒   v = √((1.0 m) a) ≈ 25 m/s

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Luba_88 [7]

The media ensure access to information because there is a wide variety of media with different opinions and collect information on different topics.

<h3>What are the media?</h3>

The media are a set of tools that have allowed the publication of information for the reader. The information used by the media is generally focused on a public and has a specific purpose to inform.

<h3>How do the media ensure access to information?</h3>

The media can assure the public access to true and reliable information because they have primary sources in different places to collect the news.

Additionally, they have developed different means of dissemination such as the internet, mobile and printed versions to have coverage over a greater number of people.

Learn more about media in: brainly.com/question/7887964

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julia-pushkina [17]

<u>SAS Criterion:</u> If two sides and the included angle of one triangle are equal to the corresponding sides and angle of another triangle, the triangles are congruent.

From the diagram you can see that:

<A ≅ <F ≅ <P

AB ≅ GF ≅ PQ

AC ≅ FE ≅ PR

This means that ΔABC, ΔFGE, and ΔPQR are congruent.

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