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3 years ago

I really don’t get this one

Physics

1 answer:

worty [1.4K]3 years ago

4 0

Compounds are molecules with 2 or more elements

So the answer would be the third one

CO2;H2O

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If the initial energy of the system was 845.54 J and the final energy of the system is -104.99 J , how much work has been done?

Yuri [45]

Whuwuwuwuwusuwbsnsns

8 0

3 years ago

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A toy helium balloon is initially at a temperature of T = 24o C. Its initial volume is 0.0042 m3 (It is a 10 cm radius sphere).

Anettt [7]

Answer:

$T_{f} = 335.780\,K\,(62.630\,^{\textdegree}C)$

Explanation:

Let assume that air behaves ideally. The equation of state of ideal gases is:

$P\cdot V = n\cdot R_{u}\cdot T$

Where:

$P$ - Pressure, in kPa.

$V$ - Volume, in m³.

$n$ - Quantity of moles, in kmol.

$R_{u}$ - Ideal gas constant, in $\frac{kPa\cdot m^{3}}{kmol\cdot K}$ .

$T$ - Temperature, in K.

Since there is no changes in pressure or the quantity of moles, the following relationship between initial and final volumes and temperatures is built:

$\frac{V_{o}}{T_{o}} = \frac{V_{f}}{T_{f}}$

The final temperature is:

$T_{f} = \frac{V_{f}}{V_{o}}\cdot T_{o}$

$T_{f} = 1.13\cdot (297.15\,K)$

$T_{f} = 335.780\,K\,(62.630\,^{\textdegree}C)$

7 0

4 years ago

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When using the magnification equation, a value greater than 1 as the solution for M indicates that the image is_____________.

Alexxandr [17]

Larger than the object.

6 0

4 years ago

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Net Force (N)

DaniilM [7]

Explanation:

F = m a

F= 4.0×4.0

F= 16 N

......................................................................................................

F= ma

25= m × 4.998

m= 25/4.998

m= 5.002 kg

......................................................................................................

F=ma

53= 3 × a

a= 53/3

a= 17.666 m/s

5 0

4 years ago

Which of the following represents the wavelength of a wave?

dlinn [17]

Answer: D. the distance between the highest points of consecutive waves

Explanation:

The wavelength of a wave is defined as the <em>distance traveled by a periodic perturbation that propagates through a medium in a given time interval</em>. It is usually represented by $\lambda$ and can be calculated if the frequency of the wave is known, since there is an inverse relationship between both.

In the specific case of a periodic sine wave (which is the way in which a wave is usually represented graphically) the wavelength can be determined as the distance between two consecutive maxima of the disturbance.

Therefore, the correct option is D.

8 0

3 years ago

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