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belka [17]
2 years ago
8

Anyone want to be f-r-i-e-n-d-s? ^^ (You may answer for fr/ee points! <3)

Physics
2 answers:
monitta2 years ago
5 0

Answer:

 

Explanation:

Nuetrik [128]2 years ago
3 0

Answer:

YESSSS!

Explanation:

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A key falls from a bridge that is 45 m above the water. the key falls straight down and lands in a model boat traveling at a con
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Let the key is free falling, therefore from equation of motion

h = ut +\frac{1}{2}gt^2..

Take initial velocity, u=0, so

h = 0\times t + \frac{1}{2}g t^2= \frac{1}{2}gt^2.

h = 0\times t + \frac{1}{2}g t^2= \frac{1}{2}gt^2 \\\ t =\sqrt{\frac{2h}{g} }

As velocity moves with constant velocity of 3.5 m/s, therefore we can use formula

d= v \times t

From above substituting t,

d = v \times \sqrt{\frac{2h}{g} }.

Now substituting all the given values and g = 9.8 m/s^2, we get

d = 3.5 \ m/s \times \sqrt{\frac{2 \times 45 m}{9.8 m/s^2} } = 10.60 m.

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7 0
3 years ago
Light with a wavelength of 400 nm strikes the surface of cesium in a photocell, and the maximum kinetic energy of the electrons
Firdavs [7]

Answer:

The longest wavelength of light that is capable of ejecting electrons from that metal is 1292 nm.

Explanation:

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Using formula of energy

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Hence, The longest wavelength of light that is capable of ejecting electrons from that metal is 1292 nm.

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Hope this helped

-Gavin

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2 years ago
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