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Westkost [7]
3 years ago
5

Which elements do hydrogen fuel cells combine to produce electricty

Physics
1 answer:
NARA [144]3 years ago
3 0
A fuel cell combines hydrogen and oxygen to produce electricity, heat, and water. Fuel cells are often compared to batteries. Both convert the energy produced by a chemical reaction into usable electric power.
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What is the wavelength of a wave?
PIT_PIT [208]
I know for a fact the answer is D. the distance traveled by the wave during one full cycle
6 0
3 years ago
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Martes
sdas [7]

Explanation:

(9) Acceleration due to gravity is defined as the acceleration between two massive bodies when they are moving under free fall.

The relation between g and G is given by :

g=\dfrac{GM}{r^2}

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(10) The unwanted product that can toxify the crops are called weeds. To control weeds, a chemical called weedicides are sprayed in the field. Some other methods to control them are Ploughing or tilling of soil etc.

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3 years ago
if the speed of sound is 34,500 cm/s and a note has a frequency of 256 hz, what is the wavelength in meters
zloy xaker [14]

Answer:

Wavelength of sound in meters = 1.348 m

Explanation:

Given

speed of sound = 34500 cms^{-1} = 345 ms^{-1} (since 1 cm = 0.01m)

frequency of sound = 256 Hz = 256s^{-1}

Wavelength of sound in meters = ?

We know that all waves have same relationship among speed s, frequency f and wavelength λ, which is given by the equation

            v = fλ

Wavelength λ = v/f

                       = 345 ms^{-1} / 256s^{-1}

                       =1.348 m

Hence wavelength of sound in meters = 1.348 m

5 0
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Задание 8. Прочитайте. Выпишите существительное среднего рода.
LekaFEV [45]

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Explanation:

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3 years ago
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