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Murrr4er [49]
3 years ago
14

Which statement best describes the light that will cause emission of electrons from a given metal through the photoelectric effe

ct?
Physics
2 answers:
arsen [322]3 years ago
7 0
You did not give the statements in the option. But <span>the light that will cause emission of electrons from a given metal through the photoelectric effect is of certain minimum frequency of certain intensity (threshold frequency) that is able to emit electron from it. Hope this helps!</span>
Darya [45]3 years ago
4 0

Answer:

b) light with any intensity above a certain frequency

or

b) light with a high enough frequency

Explanation:

both right on edge 2021

Heart me and brainlliest mee plzz.. and YW Have a nice Day! :)

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Work occurs when
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4 years ago
A 6 kg box with initial speed 5 m/s slides across the floor and comes to a stop after 1.9 s. What is the coefficient of kinetic
Ilia_Sergeevich [38]

Answer:

\mu_k=0.27

Explanation:

According to the free body diagram, in this case, we have:

\sum F_x:-F_k=ma\\\sum F_y:N=mg

Recall that the force of friction is given by:

F_k=\mu_k N

Replacing and solving for the coefficient of kinetic friction:

-\mu_kN=ma\\-\mu_k(mg)=ma\\\mu_k=-\frac{a}{g}

We have an uniformly accelerated motion. Thus, the acceleration is defined as:

a=\frac{v_f-v_0}{t}\\a=\frac{0-5\frac{m}{s}}{1.9s}\\a=-2.63\frac{m}{s^2}

Finally, we calculate \mu_k:

\mu_k=-\frac{-2.63\frac{m}{s^2}}{9.8\frac{m}{s^2}}\\\mu_k=0.27

4 0
3 years ago
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