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each type of galaxy in the Hubble classification scheme. 3. Using the method in the text book (see p. 317-318 to calculate the mass of the Milky Way Galaxy, estimate the mass total mass of the galaxy.

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each type of galaxy in the Hubble classification scheme. 3. Using the method in the text book (see p. 317-318 to calculate the mass of the Milky Way Galaxy, estimate the mass total mass of the galaxy.

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Hard

A radioactive nucleus

X

decays to a nucleus

Y

with a decay constant

λ_{X} = 0.1 sec^{- 1} . Y

further decays to a stable nucleus

Z

with a decay constant

λ_{Y} = 1/30 sec^{- 1}

. Initially, there are only

X

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N_{0} = 1 0^{20}

. Setup the rate equations for the populations of

X, Y

and

Z

. The population of the

Y

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N_{Y} (t) =

{N_{0} λ_{X} / (λ_{X} - λ_{Y})} {exp (- λ_{Y} t) - exp (- λ_{X} t)}

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N_{Y}

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X

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Book:

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Question 2

Medium

A torch bulb rated as

4.5 W, 1.5 V

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(B)

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(C)

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Question 3

Medium

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$3/4$
1

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Question 4

Medium

A plano-convex lens

(μ = 1.5)

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Book:

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Question Text	each type of galaxy in the Hubble classification scheme. 3. Using the method in the text book (see p. 317-318 to calculate the mass of the Milky Way Galaxy, estimate the mass total mass of the galaxy.
Topic	All topics
Subject	Physics
Class	Class 12

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