sabendo que uma onda sonora tem um periodo de 0,002s e um comprimento de onda de 0,5m determine sua velocidade nesse meio
1 answer:
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Explanation:
Given that,
Wavelength of the photon,
Work function of the metal,
We need to find the maximum kinetic energy of the ejected electrons. It can be calculated using Einstein's photoelectric equation as :
or
So, the maximum kinetic energy of the ejected electrons is 3 ev. Hence, this is the required solution.
Let's consider two resistors only for simplicity. When the resistors are connected in parallel, the potential difference on each resistor is the same, and it is equal to the voltage of the battery, V:
(1)
Instead, the current splits in the two resistors:
(2)
where I is the current in the circuit, I1 and I2 are the currents in the two resistors.
By using Ohm's law, we can rewrite (2) as
(3)
where
is the equivalent resistance of the circuit. But we also said that
So we can rewrite (3) as
which becomes
So, the equivalent resistance of the parallel of n resistors is given by
Instead, the current splits in the two resistors:
where I is the current in the circuit, I1 and I2 are the currents in the two resistors.
By using Ohm's law, we can rewrite (2) as
where
So we can rewrite (3) as
which becomes
So, the equivalent resistance of the parallel of n resistors is given by