Answer: B. 100 Hz
Explanation:
Here, the frequency for the standing-wave modes of a tube is given as
f(n)= m*f
For first frequency put f= 20 Hz, m=1
So f₁= 1*20= 20Hz
The next resonance occurs at m=3
f₂= 3*20= 60 Hz
So meaning at odd intervals the resonance occurs so next will occur at m=5
So,
f₃= 5*20= 100 Hz
So, option B. 100 Hz is correct.
Chemical reactions produces new substances and may be a synthesis, decomposition, combustion, replacement, or neutralization reaction.
<h3>What are chemical reactions?</h3>
Chemical reactions are changes which occurs in substances producing changes in the chemical properties of the substance.
The chemical reactions described are as follows:
- Synthesis: at least two reactants and one product
- Decomposition: at least one reactant and two products
- Combustion: oxygen is one of the reactants and large amount of energy is released
- Replacement: at least one or more atoms replaces a part of a compound
- Neutralization: the products are always salt and water
Learn more about chemical reactions at: brainly.com/question/11231920
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Answer:
Explanation:
Given:
- refractive index of the glass plate,
- thickness of the glass plate,
- wavelength of the source light,
<u>We know that the refractive index of a medium is given as:</u>
Hence the no. of wavelengths in the glass:
Answer:
Inducted Magnetic field will be toward from you
Inducted current direction will be counter clockwise.
Explanation:
Lenz's law states that the direction of the current induced in a wire by a changing magnetic field is such that the magnetic field created by the induced current opposes the initial changing magnetic field.
So if the field begins to decrease, the induced magnetic field would try to stop this, so its direction will be the same as the magnetic field, toward from you.
This induced magnetic field is produced by the current in the wire. If the inducted magnetic field will be toward you, the right hand rule says that the direction from the inducted current will be counter clockwise.
Ok so I’m not best at this but I think it would be food chains.