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makvit [3.9K]
3 years ago
13

Phase change occurs in which of the following A. A suspension. B boiling point. C An explosion D Mixing Point

Physics
2 answers:
QveST [7]3 years ago
5 0

Answer:

B. Boiling point

Explanation:

Boiling water: A phase change occurs when water boils.

The three common phases are solid, liquid, and gas. A phase change happens when one phase changes into different phase without a change in chemical composition.

When water boils, the liquid phase becomes a gas (water vapor or steam). The chemical composition of water does not change while boiling because each phase consists of water.

Thus, boiling water is the phenomena of a phase change.

Therefore there will be a phase change at boiling point.

Inessa05 [86]3 years ago
4 0
C I think not totally sure
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To calculate the change in kinetic energy, you must know the force as a function of _______. The work done by the force causes t
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Answer:

(c) position

Explanation:

From the work-energy theorem, the workdone by a force on a body causes a change in kinetic energy of the body.

But, remember that the work done (W) by a force (F) on a body is the product of the force and the distance d, moved by the body caused by the force. i.e

W = F x d

This distance is a measure of the position of the body at a given instance.

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A concave lens has a focal length of 25cm. it's power in diaptor is​
IgorLugansk [536]

As we know that :

\begin{gathered}\large{\boxed{\sf{P \: = \: \dfrac{1}{f}}}} \\ \\ \rightarrow {\sf{P \: = \: \dfrac{1}{-25}}}\end{gathered}

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\begin{gathered}\rightarrow {\sf{P \: = \: \dfrac{1}{\dfrac{-25}{100}}}} \\ \\ \rightarrow {\sf{P \: = \: \dfrac{-100}{25}}} \\ \\ \rightarrow {\sf{P \: = \:- 4}} \\ \\ \underline{\sf{\therefore \: Power \: of \: Concave \: lens \: is \: - \: 4D}}\end{gathered}

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1 year ago
Describe briefly how you would check that the rule is horizontal in this experiment. You  may draw a diagram.​
aliina [53]

Answer:

We want to describe how to graph a linear equation.

Explanation:

The given equation is:

y = -4x - 1

a) To graph it, we need to find two points that belong to the line, then we graph the points, and then we connect them with a line.

To get the points, we just need to evaluate the function in two different values of x.

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So we have the point (0, -1)

for x = 1

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So we have the point (1, - 5)

Now we just need to find these two points and connect them with a line, the graph can be seen below.

b) To check if the graph is correct we can see two things:

in y = -4*x - 1

The y-intercept is -1, this means that the graph should intersect the y-axis at  y = -1

The slope is -4, this means that for each unit increase on x, we should see that the y-value decreases by 4.

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pls give brainliest!

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