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aalyn [17]
2 years ago
6

You have a cup full of water and a bathtub full of water. Both samples of water have a temperature of 30°C. Which sample has gre

ater amount of heat?
Physics
1 answer:
DENIUS [597]2 years ago
5 0

Answer:

 temperature is -10

Explanation:

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Both are metals and are good conductors of electricity and heat.
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5. A person fishing from a pier observes that four wave crests pass by in 7.0 s and estimates that the distance between two succ
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Answer:

v= 1.71 m/s

Explanation:

Given that

Distance between two successive crests = 4.0 m

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T= 7 sec

T is the time between 3 waves.

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1 wave = 7 /3 sec

So t= 7/3 s

We know that frequency f

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v= f λ

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Which describes the position on a horizontal number line
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Answer:

It is formed by a horizontal number line, called the x-axis, and a vertical number line, called the y-axis.

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Calculate the change in the energy of an electron that moves from the n = 3 level to the n = 2 level. What type of light is emit
marissa [1.9K]

Answer:

Red light

Explanation:

The energy emitted during an electron transition in an atom of hydrogen is given by

E=E_0 (\frac{1}{n_2^2}-\frac{1}{n_1^2})

where

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n2 = 2

So the energy of the emitted photon is

E=(13.6) (\frac{1}{2^2}-\frac{1}{3^2})=1.9 eV

Converting into Joules,

E=(1.9 eV)(1.6\cdot 10^{-19} J/eV)=3.0\cdot 10^{-19} J

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E=\frac{hc}{\lambda}

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\lambda=\frac{hc}{E}=\frac{(6.63\cdot 10^{-34})(3\cdot 10^8)}{3.0\cdot 10^{-19}}=6.63\cdot 10^{-7} m = 663 nm

And this wavelength corresponds to red light.

5 0
2 years ago
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