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3 years ago

What is the difference between continuous and a discontinuous spectrum?

1 answer:

5 0

A continuous spectrum contains all the wavelengths

A discontinuous spectrum has strips of specific colors and can be used to identify the elements making it.

hope this helps

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Suppose that we use a heater to boil liquid nitrogen (N2 molecules). 4480 J of heat turns 20 g of liquid nitrogen into gas. Note

love history [14]

Answer:

The energy is $9.4\times10^{-21}\ J$

(a) is correct option

Explanation:

Given that,

Energy = 4480 j

Weight of nitrogen = 20 g

Boil temperature = 77 K

Pressure = 1 atm

We need to calculate the internal energy

Using first law of thermodynamics

$Q=\Delta U+W$

$Q=\Delta U+nRT$

Put the value into the formula

$4480=\Delta U+\dfrac{20}{28}\times8.314\times77$

$\Delta U=4480-\dfrac{20}{28}\times8.314\times77$

$\Delta U=4022.73\ J$

We need to calculate the number of molecules in 20 g N₂

Using formula of number of molecules

$N=n\times \text{Avogadro number}$

Put the value into the formula

$N=\dfrac{20}{28}\times6.02\times10^{23}$

$N=4.3\times10^{23}$

We need to calculate the energy

Using formula of energy

$E=\dfrac{\Delta U}{N}$

Put the value into the formula

$E=\dfrac{4022.73}{4.3\times10^{23}}$

$E=9.4\times10^{-21}\ J$

Hence, The energy is $9.4\times10^{-21}\ J$

4 0

3 years ago

Are defined as subatomic particles that have more mass than neutrinos but do not interact with light.

stepladder [879]

Electrons are the right subatomic particle

4 0

3 years ago

Newtons second law lab report link

gulaghasi [49]

Answer:

ghittu iihg उह्स उउह्स उग्य्किव जिक्ह्ब

5 0

3 years ago

What do you think swarming locusts affect planted crops?

galina1969 [7]

Answer:

they say yum yum as they eat planets and make humans starve

Explanation:

but they still eat them

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3 years ago

Read 2 more answers

What distance in cm does the light travel in 1 us?

Maksim231197 [3]

108000000. there you go hope it helped

6 0

3 years ago