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bearhunter [10]
3 years ago
7

On a drawing showing the movement of a kickball, you see an arrow above the ball labeled "10 m/s" and the arrow shows BOTH the s

peed and direction of the kickball. This arrow is _______.
a force arrow
a vector
a speed arrow
an acceleration arrow

Chemistry
2 answers:
Nadusha1986 [10]3 years ago
7 0
 The correct answer would be the second option. On a drawing showing the movement of a kickball, you see an arrow above the ball labeled "10 m/s" and the arrow shows BOTH the speed and direction of the kickball. This arrow is a vector. This is because it gives both direction and magnitude.
aleksley [76]3 years ago
6 0

Answer: a vector

Explanation: Scalar quantities are those which only have magnitude. Example:  Speed(s) : It only gives the magnitude and not the direction. s=10ms^{-1}

Vector quantities are those which have magnitude as well as direction. Vectors are represented by putting an arrow on the symbol. Example: velocity(v): It gives the magnitude as well as direction.v=10ms^{-1} moving towards north.

Vector quantities are represented by putting an arrow above the symbol of the quantity as shown in image.

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When you have finished adding the necessary amount of NaOH to your beaker, what color will the litmus paper turn?
Svetllana [295]

<u>Answer:</u> The red litmus paper turns blue on dipping in NaOH solution.

<u>Explanation:</u>

Litmus paper is the indicator that detects the nature of the solution, whether it is acidic or basic.

There are 2 types of litmus paper:

  • <u>Red litmus paper:</u> This paper will turn blue if it is dipped in basic solution and will remain as such if it is dipped in acidic solution.
  • <u>Blue litmus paper:</u> This paper will turn red if it is dipped in acidic solution and will remain as such if it is dipped in basic solution.

NaOH is a strong base, so when a red litmus paper is dipped in the beaker having necessary amount of NaOH, the red litmus paper turns into blue.

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3 years ago
Dependent variable? ( what did we measore)?
lana66690 [7]
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3 years ago
If I want to lower the volume (loudness) I can do which of the following. Select all that apply.
nirvana33 [79]

Sound travels in waves and the height of the wave is the loudness of the sound.

To decrease sound, you need to make the waves not so high, so you can

- decrease the amplitude

- decrease the height of the crest   (lower the top of the wave down)

- increase the height of the trough  (bring the bottom of the wave up)

It's all about getting the wave to be closer to the center, to not be so high and low, but to be flatter.

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6 0
3 years ago
What are fossils? *​
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Answer:

mark me as the brainliest

Explanation:

Fossils are the preserved remains, or traces of remains, of ancient organisms. Fossils are not the remains of the organism itself! They are rocks. A fossil can preserve an entire organism or just part of one. Bones, shells, feathers, and leaves can all become fossils.

8 0
3 years ago
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A student made an initial 1:5 dilution of protein lysate. Then 2mL of that was added to 8mL of water. Lastly, the student made a
Licemer1 [7]

Answer:

The final dilution is 1:400

Explanation:

Let's analyze what we are told: we have an initial 1:5 dilution of protein lysate. This means that the initial solution (stock solution) was diluted 5 times. Then, from this dilution the student prepared another dilution taking 2 mL of the first dilution in 8 mL of water. This is the same as saying we took 1 mL of first dilution in 4 mL of water (the ratio is the same), so we now have a second 1:4 dilution of the first dilution (1:5). Finally, the student made a third 1:20 dilution, this means that the second dilution was further diluted 20 times.

So, to calculate the final dilution of protein lysate, we have to multiply all the dilution factors of every dilution prepared: in this case we have a final dilution of 1:20, this means we have a factor dilution of 20. But it was previously diluted 4 times, so we have a factor dilution of 20×4 = 80. However, this dilution was also previously diluted 5 times, so the new dilution factor is 80 × 5 = 400

This means that the final dilution of the compound was diluted a total of 400 times compared to the initial concentration of stock solution.

3 0
3 years ago
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