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Chapter 44: Q47P (page 1365)

How much energy would be released if Earth were annihilated by collision with an anti-Earth?

Short Answer

Expert verified

this energy will power the sun for $8.826 \times 10^{7}$ years.

Step by step solution

Earth annihilation by collision

During the annihilation of matter and antimatter whole mass converts to energy. mass of earth made of matter and antimatter is equal.

this energy will power the sun for $8.826 \times 10^{7}$ years.

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Most popular questions from this chapter

Which conservation law is violated in each of these proposed reactions and decays? (Assume that the products have zero orbital angular momentum.)

$(a) \land^{0} \to {pK}^{-}; (b) Ω^{-} \to \sum_{}^{-} + π^{0} (S = - 3, q = - 1, m = 162 MeV / c^{2}, and m_{s} = \frac{3}{2} forΩ); (c) K^{-} + p \to \land 0 + π^{+}$

There are baryons with spin .Their symbols and quantum numbers for charge and strangeness are as follows:

	q	S		q	S
$∆^{-}$	-1	0	$\sum_{}^{* 0}$	0	-1
$∆^{0}$	0	0	$\sum_{}^{* +}$	+1	-1
$∆^{+}$	+1	0	$\equiv^{* 0}$	-1	-2
$∆^{+ +}$	+2	0	$\equiv^{* 0}$	0	-2
$\sum_{}^{* -}$	-1	-1	$Ω^{-}$	-1	-3

Make a charge–strangeness plot for these baryons, using the sloping coordinate system of Fig. 44-3. Compare your plot with this figure.

What quark combination is needed to form (a) and (b) $Ε^{0}$

Suppose that the matter (stars, gas, dust) of a particular galaxy, of total mass $M$ , is distributed uniformly throughout a sphere of radius.A star of mass $R$ is revolving about the center of the galaxy in a circular orbit of radius. $r < R$

(a) Show that the orbital speed $v$ of the star is given by

$v = r \sqrt{\frac{G M}{r^{3}}}$

And therefore that the star’s period $T$ of revolution is

$T = 2 π \sqrt{\frac{R^{3}}{G M}}$

Independentof. $r$ Ignore any resistive forces.

(b) Next suppose that the galaxy’s mass is concentrated near the galactic center, within a sphere of radius less than . What expression then gives the star’s orbital period?

Which conservation law is violated in each of these proposed decays? Assume that the initial particle is stationary and the decay products have zero orbital angular momentum.

(a) $μ^{-} \to e^{-} + ν_{μ}$ ; (b) $μ^{-} \to e^{+} + ν_{e} + {v^{-}}_{μ}$ ;(c) $μ^{+} \to π^{+} + ν_{μ^{+}}$

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How much energy would be released if Earth were annihilated by collision with an anti-Earth?

Short Answer

Step by step solution

Earth annihilation by collision

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Most popular questions from this chapter

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