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yKpoI14uk [10]
3 years ago
13

A monochromatic light beam with a quantum energy value of 3.0 ev is incident upon a photocell. the work function of the photocel

l is 1.6 ev. what is the maximum kinetic energy of the ejected electrons?
Physics
2 answers:
Lyrx [107]3 years ago
4 0
It's 1.4 
thats what i found 
otez555 [7]3 years ago
3 0
1.4 ev I'd explain but I gotta roll!
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Which type of wave is described as a wave that is not confined to the space along medium?
Dmitry [639]

Traveling wave is a wave that is not confined to the space along medium.

traveling wave is a wave that travels along the medium causing disturbance. instead of vibrating at the same place, the particles actually move in the direction of wave. one common example of such type of wave is ocean waves.

4 0
4 years ago
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If 1.34 ✕ 1020 electrons move through a pocket calculator during a full day's operation, how many coulombs of charge moved throu
ioda

Given :

Number of operations move through a pocket calculator during a full day's operation , n=1.34 \times 10^{20} .

To Find :

How many coulombs of charge moved through it .

Solution :

We know , charge in  one electron is :

e^-=-1.6\times 10^{-19}\ coulombs

So , charge on n electron is :

C=e^-\times n\\C=-1.6\times 10^{-19}\times 1.34\times 10^{20} \ C\\C=-21.44\ C

Therefore , -21.44 coulombs of charge is moved through it .

Hence , this is the required solution .

3 0
3 years ago
A microwave oven operates with sinusoidal microwaves at a frequency of 2400 mhz. the height of the oven cavity is 25 cm and the
Natali [406]
It takes Δt time to travel the Em wave which is on top of the microwave to bottom of the microwave.
Δt = h/c
P = E / Δt = cE/h
P = 3× 10⁸ ₓ 0.5  10⁻⁶ / 0.25
600w.
4 0
3 years ago
A building is being knocked down with a wrecking ball, which is a big metal sphere that swings on a 15-m-long cable. You are (un
Charra [1.4K]

Answer:

1.9 s

Explanation:

We are given that

Length of cable=l=15 m

We have to find the time you have to move out of the way.

We know that

Time period,T=2\pi\sqrt{\frac{l}{g}}

Where g=9.8m/s^2

By using the formula

T=2\pi\sqrt{\frac{15}{9.8}}

T=2\times 3.14\times \sqrt{\frac{15}{9.8}}=7.77 s

Time you have to move out

t=\frac{T}{4}=\frac{7.77}{4}=1.9 s

Hence,time you have to move out of the way=7.77 s

6 0
3 years ago
Each statement below represents a feature that has been claimed to exist on Mars. Sort the statements into the correct bin accor
Wittaler [7]

Answer:

Earth’s Moon:

It has no atmosphere due to weak gravity. Venus: It is too hot for liquid water.

Europa:

Is too cold for liquid water Mars: Scientists believe it used have flowing water Europe is a small moon of the planet Jupiter and according to studies, it is confirmed that the moon is too cold to have liquid water.

Venus: Venus is generally known as an extremely hold planet where liquid water would immediately turn into gas.

Mars:

is popularly identified with aliens since several theories talk about a prehistoric alien race that lived on it’s surface.

5 0
3 years ago
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