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4 years ago

Consider this statement: Air is matter. Which facts best support the statement?

Physics

2 answers:

mihalych1998 [28]4 years ago

8 0

The answers is A and C hope this helps :)

Tju [1.3M]4 years ago

6 0

<h3><u><em>Answer;</em></u></h3>

<em>A. Balloons can be filled with air. </em>

<em>C. Air has mass</em>

<h3><u>Explanation;</u></h3>

<em><u>A matter is anything that can occupy space and has a particular weight.</u></em>
<u><em>Matter</em></u> is classified into three states which are; solids, liquids, and gases. the three state of matters differ in terms of packaging of molecules and their shape, that is whether definite or indefinite, or their volume.
<em><u>Air is an example of matter which is in gaseous state. It has both mass and occupies weight.</u></em> The fact that air has mass makes it matter. Also the fact that balloons can be filled with air means that air occupies space.

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4 years ago

Displacement vector points due east and has a magnitude of 3.35 km. Displacement vector points due north and has a magnitude of

tekilochka [14]

Answer:

(a) 6.56 km

(b) $59.68^\circ$ north of west

Explanation:

Given:

$\vec{d}_1= 3.35\ km\ east = 3.35\ km\ \hat{i}\\\vec{d}_2= 9.31\ km\ north = 9.31\ km\ \hat{j}\\\vec{d}_3= 6.66\ km\ west = -6.61\ km\ \hat{i}\\\vec{d}_4= 3.65\ km\ south = -3.65\ km\ \hat{j}\\$

Let the resultant displacement vector be $\vec{D}$ .

As the resultant is the vector sum of all the vectors.

$\therefore \vec{D}=\vec{d}_1+\vec{d}_2+\vec{d}_3+\vec{d}_4\\\Rightarrow \vec{D} =(3.35\ km\ \hat{i})+(9.31\ km\ \hat{j})+(-6.61\ km\ \hat{i})+(-3.65\ km\ \hat{j})\\\Rightarrow \vec{D} =-3.31\ km\ \hat{i}+5.66\ km\ \hat{j}\\\textrm{Magnitude of the resultant displacement vector} = \sqrt{(-3.31)^2+(5.66)^2}\ km= 6.56\ km\\$

$\textrm{Angle with the positive west} = \theta = \tan^{-1}(\dfrac{5.66}{3.31})= 59.68^\circ$

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White raven [17]

What is meant by the number of complete oscillation made by an oscillating body in 10 seconds is 500 complete oscillations is that the frequency of the oscillating body is 50Hz

<h3>What is frequency?</h3>

Frequency of an oscillating body can be defined as the number of complete oscillations per unit time

Frequency is measured in hertz (Hz).

Also, the frequency of 1Hz is one oscillation per second.

frequency = number of oscillations/ time taken

frequency = 500/10 = 50 Hz

Thus, what is meant by the number of complete oscillation made by an oscillating body in 10 seconds is 500 complete oscillations is that the frequency of the oscillating body is 50Hz

Learn more about frequency here:

brainly.com/question/1199084

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