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3 years ago

I need this asap pls

Physics

1 answer:

user100 [1]3 years ago

3 0

Answer:

2 i think

Explanation:

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Would someone plz help a shister outttt

tiny-mole [99]

Yaaaas, do you watch James Charles!?

8 0

4 years ago

What is the maximum velocity (in m/s) of electrons ejected from a material by 85 nm photons, if they are bound to the material b

diamong [38]

The maximum velocity of electrons is v = 3.20 × 10¹⁵ m/s

The wavelength of photons λ = 85 nm

W = 4.66 ev

<h3>What is photoelectric effect and how velocity of photoelectrons is calculated?</h3>

The emission of electrons happened and absorbed through the electromagnetic radiation is said to be photoelectric effect.

Photoelectric cells, photodiodes works on the principle of photoelectric effect.

According to of photoelectric effect,

E = hν

Here, hc / λ = W + KE max

hc / λ = W + 1/2 mv² max

v² = sqrt of (( hc / λ - W) (2/m))

I cap denotes λ ,

substituting all the values,

v = sqrt of ( (6.623 × 10⁻³⁴ Js ) ( 3 × 10⁸ m/s) / (85 nm) - 4.66ev) (2/ 9.1× 10⁻³¹

v = sqrt of ((1.987800 × 10⁻²⁵ / 85 × 10 ⁹ ) - 4.66 ev ) ( 2.197 × 10³⁰)

v = sqrt of ((2.338588 × 10⁻³⁶) - 4.66 ev ) ( 2.197 × 10³⁰)3.2

v = 3.20 × 10¹⁵ m/s

Thus, the maximum velocity is calculated as v = 3.20 × 10¹⁵ m/s.

Learn more about photoelectric effect,

brainly.com/question/1895423

#SPJ4

4 0

2 years ago

The centre of mass of a metre rule is at the 50cm mark. state what is meant by Centre of mass

Tanya [424]

Answer:

Centre of mass of any body is a point where all mass of a body is supposed to be concentrated

it lies in geometrical centre....

3 0

3 years ago

A rubber ball and a lump of clay have equal mass. They are thrown with equal speed against a wall. The ball bounces back with ne

gregori [183]

Answer:

The ball experiences the greater momentum change

Explanation:

The momentum change of each object is given by:

$\Delta p = m \Delta v= m (v-u)$

where

m is the mass of the object

v is the final velocity

u is the initial velocity

Both objects have same mass m and same initial velocity u. So we have:

- For the ball, the final velocity is

$v=-u$

Since it bounces back (so, opposite direction --> negative sign) with same speed (so, the magnitude of the final velocity is still u). So the change in momentum is

$\Delta p=m(v-u)=m((-u)-u)=-2mu$

- For the clay, the final velocity is

$v=0$

since it sticks to the wall. So, the change in momentum is

$\Delta p = m(v-u)=m(0-u)=-mu$

So we see that the greater momentum change (in magnitude) is experienced by the ball.

3 0

3 years ago

A stone is thrown vertically upward with an initial velocity of 25m/s , calculate time taken to return to the thrower

Nonamiya [84]

Answer:

can you give me abrainlest??

5 0

3 years ago

I need this asap pls ​

I need this asap pls