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m_a_m_a [10]
3 years ago
11

Which astronomer spent 20 years plotting the positions of the planets

Physics
2 answers:
dalvyx [7]3 years ago
6 0

Answer

Tycho Brahe

Explanation

Tycho Brahe who was born on 1546. He was an astronomer.Tycho Brahe spent 20 years in plotting the positions of the planets and he was among those astronomers who helped in giving the  heliocentric model of the universe..

klio [65]3 years ago
5 0
That was Tycho Brahe, and I thought it was actually more years than that.
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The position of a dragonfly that is flying parallel to the ground is given as a function of time by r⃗ =[2.90m+(0.0900m/s2)t2]i^
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The solution for this problem is:

 
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7 0
2 years ago
Read 2 more answers
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

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

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8 0
3 years ago
A beam of monochromatic light with a wavelength of 400 nm in air travels into water. what is the wavelength of the light in wate
slava [35]
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The relationship between frequency f and wavelength \lambda of a wave is given by:
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5 0
2 years ago
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