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2 years ago

Thermal energy is added to four identical samples of water what increases in each sample

2 answers:

8 0

Thermal energy is added to four identical 1.0 kg samples of water at room temperature. Which of the following increases in each sample? average charge of an electron; average density of a nucleus; average mass of a proton; average speed of a molecule. Your answer: -. Answer: D - average speed of amolecule.

belka [17]2 years ago

8 0

Answer:

Average speed of a molecule

Explanation:

If thermal energy (heat) is added to a substance or sample, according to the first law of thermodynamics this will cause the internal energy in that sample to increase.

The increase in internal energy will be manifested in that the speed of the molecules that make up the substance will increase, and therefore the average speed of a molecule increases.

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C, N, Ne, Ar which contains a metal, nonmetal, noble gas , metalloid

postnew [5]

Answer:

c,carbono nonmetal

n, nitrogen nonmetal

ne, neón noble gas

ar,argon noble gas

4 0

2 years ago

3. Ecology

Korvikt [17]

Answer:

The family would not have hot water unless they were to heat the the water. They would have to depend on the stove in order to survive by heating the house to say alive and not freeze. They would also have to depend on the stove to get hot water to do any, but if the sun goes away for too long and everything starts to die then they will have to use what food and wood that they have in order to survive.

Explanation:

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3 years ago

Which explanation is least likely to be evidence for geological processes changing Earth's surface?

horsena [70]

Pollution isn’t a geological process.

3 0

2 years ago

Read 2 more answers

A photon of wavelength 192 nm strikes an aluminum surface along a line perpendicular to the surface and releases a photoelectron

alex41 [277]

Answer:

$KE=3.529\times10^{−27}\ J$

Explanation:

Given that

Wavelength λ=192 nm

So energy of photon,E

$E=\dfrac{hC}{\lambda }$

Now by putting the values

$h=6.6\times 10^{-34}\ m^2.kg/s$

$C=3\times 10^{8}\ m/s$

$E=\dfrac{6.6\times 10^{-34}\times 3\times 10^{8}}{192\times 10^{-9} }$

$E=1.03\times 10^{-18} J$

We know that

Kinetic energy given as

$KE=\dfrac{P^2}{2m}$

$KE=\dfrac{E^2}{2mC^2}$

$KE=\dfrac{(1.03\times 10^{-18})^2}{2\times 1.67\times 10^{-27}(3\times 10^8)^2}$

$KE=3.529\times10^{−27}\ J$

5 0

2 years ago

You are watching a wave with a frequency of 512 Hz go past. How many peaks of the wave go past you each minute?

inna [77]

Answer:

61440 peaks

Explanation:

A hertz represents one cycle for every second:

$f= Hz=\frac{1}{s}$

So if a wave have frequency of 2Hz for example, this means the wave does two cycles per second.

Normally the waves are represented by cosine or sine waves. These kind of waves have two peaks in each cycle, one positive and one negative. With this in mind, let's calculate how many peaks of the wave pass each minute.

A minute has 60 seconds, hence:

$60*512=30720\hspace{3}cycles\hspace{3}per\hspace{3}minute$

And we know already that every cycle has two peaks, so:

$30720*2=61440\hspace{3}peaks\hspace{3}per\hspace{3}minute$

4 0

2 years ago

Read 2 more answers