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harina [27]
1 year ago
10

Light of frequency 5*10^14hz liberates electron with energy 2.31*10^-19 joule from a certain surface .what is wave length of ult

raviolet light liberates electron of energy 8.93*10^-19 from the same surface.
Physics
1 answer:
stealth61 [152]1 year ago
5 0

Answer:  Light of frequency 5 x 1014 HZ liberates electrons with energy 2.3 x 10-19from a certain metallic surface.

Explanation:

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When 150 joules of work is done on a system by an external force of 15 newtons in 20. seconds, the total energy of that system i
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Answer:

1.5 × 10^2 J

Explanation:

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Assume that the wavelengths of photosyntheticallyactive radiations (PAR) are uniformly distributed at integernanometers in the r
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3 years ago
If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of the
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Answer:

a. v₁ = 16.2 m/s

b. μ = 0.251

Explanation:

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a.

To determine v₁ to take a 100 m radius curve banked at 15 °

tan θ  = v₁² / r * g

v₁ = √ r * g * tan θ

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b.

To determine μ friction needed for a frightened

v₂ = 15.0 km / h * 1000 m / 1 km * 1h / 60 minute * 1 minute / 60 seg

v₂ = 4.2 m/s

fk = μ * m * g

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a₂ = v₂² / r = 4.2 ² / 100 m = 0.18 m/s²

F₁ = m * a₁  ,  F₂ = m * a₂

fk = F₁ - F₂   ⇒  μ * m * g = m * ( a₁ - a₂)

μ * g = a₁ - a₂   ⇒  μ = a₁ - a₂ / g

μ = [ 2.63 m/s² - 0.18 m/s² ] / (9.8 m/s²)

μ = 0.251

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3 years ago
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Explanation:

guxxxhchclcyffktx

oye hoye thanks for point ✌✌✌✌✌

4 0
2 years ago
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The ability to sustain life
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3 years ago
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