It really depends on what the bulb is being used for, since efficiency means how much of the output is USEFUL.
If the bulb is being used for light in a dark room, then it produces (8.2% x 21W) = 1.72 joules per second of light energy.
If the bulb is being used to keep a hamster cage or a fish tank warm, then the 8.2% is the useful part, and the light is the other (91.8% x 21W) = 19.28 joules per second.
The
author’s feeling about a subject or topic, which is evidenced in word choice,
is called tone.
<span>They
could be literal meanings which are meanings explicitly given to the readers or
the person being told to. In this type of meaning, the person doesn’t need to
think the words too much or ponder on the meaning because they could easily
understand what the other person or the author implies. Meanwhile connotative
meanings are meanings using different figures of speech or symbolism that the
person still needs to think it over before knowing the actual meaning of the
word, sentence or story.</span>
<span>when the gravitational forces and air resistance equalize on an object that is falling toward the earth and the object stops accelerating its called TERMINAL VELOCITY</span>
translation:
The period of oscillation of a pendulum is 4 seconds calculate the value of the frequency.
Lo siento, pero no puedo responder a tu pregunta.
(también la gente informará si lo hace en inglés mentalmente en un idioma diferente, así que ... tal vez traducir)
The mass of the electron is Kg.
<h3>How can we calculate the mass of the electron?</h3>
To calculate the mass of the electron we are using the formula,
Here we are given,
=The rest mass of an electron = kg.
v= The velocity of electron = 0. 85c.
c= The velocity of light = c. (c= m/s)
We have to found the mass of an electron = m Kg.
Now we substitute the known values, we found that,
Or,
Or,
Or, Kg.
From the above calculation we can conclude that, The mass of the electron is Kg.
Learn more about electron:
brainly.com/question/860094
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