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Rama09 [41]
4 years ago
14

A boy weighs (W) 270 N. What is his mass? gon earth is = 9.8 m/s2

Physics
1 answer:
Stolb23 [73]4 years ago
4 0

Explanation:

mass of object on moon is 60kg and weight =6 0g/6=10×10=100N. Answered By. toppr. 621 Views. How satisfied are you with the answer?

Missing: 270 ‎gon

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How are mass and inertia related
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A 45.0-kg sample of ice is at 0.00°C. How much heat is needed to melt it? For water, Lf=334 kJ/kg and Lv=2257 kJ/kg 
Aleonysh [2.5K]

Heat required to change the phase of ice is given by

Q = m* L

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L = latent heat of fusion

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3 years ago
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Audrey, an astronomer is searching for extra-solar planets using the technique of relativistic lensing. Though there are believe
KIM [24]

Answer:

- the expected value is 8

- the standard deviation is 2.8284

Explanation:

Given the data in the question;

The model N(t), the number of planets found up to time t, as a poisson process,

∴ N(t) has distribution of poisson distribution with parameter (λt)

so

the mean is;

λ = 1 every month = 1/3 per month

E[N(t)] = λt

E[N(t)] = (1/3)(24)

E[N(t)] = 8

Therefore, the expected value is 8

For poisson process, Variance and mean are the same,

Var[N(t)] = Var[N(24)]

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Var[N(t)] = 8

so the standard deviation will be;

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8 0
3 years ago
g Calculate the maximum wavelength of light that will cause the photoelectric effect for potassium. Potassium has work function
Ivahew [28]

Answer:

λ = 5.4196 10⁻⁷m,  λ = 541.96 nm    this is green ligh

Explanation:

The photoelectric effect was explained by Eintein assuming that the light was made up of particles called photons and these collided with the electrons taking them out of the material.

 

                     K = h f -Ф

where K is the kinetic energy of the ejected electrons, hf is the energy of the light quanta and fi is the work function of the material.

The speed of light is related to wavelength and frequency

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                  f = c /λ

we substitute

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for the case that they ask us the kinetic energy of the electons is zero (K = 0)

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                λ = h c / Ф

we calculate

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let's take nm

                lam = 541.96 nm

this is green light

4 0
3 years ago
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