3 years ago

Which of the following atoms contain a nucleus with no neutrons.

Physics

2 answers:

Aleksandr-060686 [28]3 years ago

7 0

Answer:

Hydrogen

Explanation:

(H) atom does not have any neutrons in it's tiny nucleus.

Tatiana [17]3 years ago

6 0

Answer: C. Hydrogen

Explanation: Now I can answer the question lol, that bot didn't let me.

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What is the frequency of radiation whose wavelength is 0.80 nm ? express the frequency in inverse seconds to three significant d

Mashcka [7]

The relationship between the frequency (f) of an electromagnetic wave, the speed of the wave (which is the speed of light, c) and its wavelength $\lambda$ is given by
$f= \frac{c}{\lambda}$

Since the wavelength of the radiation in the problem is $\lambda= 0.80 nm = 0.80 \cdot 10^{-9} m$ , by substituting numbers in the formula we can get the frequency:
$f= \frac{3 \cdot 10^8 m/s}{0.80 \cdot 10^{-9} m} =3.75 \cdot 10^{17} s^{-1}$

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3 years ago

To estimate the distance in kilometers of a flash of lightning, count the number of seconds between seeing the flash and hearing

Triss [41]

Answer:

Divide by 3

Explanation:

In order to estimate the distance traveled by a lightening flash in kilometers, we follow these simple steps:

Make a count of the number of seconds in between the period a flash occur and the thunder accompanied by the lightening flash is heard.
Dive the total number of seconds by 3 to get the distance traveled by the flash. This is because in order to cover 1 km, it roughly takes 3 seconds.

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3 years ago

Which statement best supports the claim that there is such a thing as a perfect pitch?

givi [52]

I would say the answer is B

Hope it helps!

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3 years ago

Visible light with a wavelength of 480 nm appears

DedPeter [7]

Green would be best
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