Physics, 14.04.2020 22:53 jaaiphieaslade

Here are five stars or star-like objects as we might observe them today. Eleven billion years from now, what will be the most probable state of each object? You may need to use the scroll bar to see all answer options from left to right. quizlert

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Answer from: awrgiAg

Complete Question:

The five stars or star like objects are given below:

1) Newly formed $0.09M_{sun}$ star

2) $0.065 M_{sun}$ Protostar

3) $0.9M_{sun}$ white dwarf; single star(not binary)

4) 1 $M_{sun}$ main sequence star,; single star(not binary)

5) 1.4 $M_{sun}$ white dwarf; binary with a red giant companion

Check below for the explanations

Explanation:

The lifetime of the star will be given by:

$\tau = \tau_{sun} (\frac{M}{M_{sun} }) ^{-2.5}$

Lifetime of the sun, $\tau_{sun} = 10^{10} years$

1) For the newly formed $0.09M_{sun}$ star

$\tau = 10^{10} * (0.09) ^{-2.5}\\\tau = 4.11 * 10^{12} years$

The star is in the main sequence

2) $0.065 M_{sun}$ Protostar

$\tau = 10^{10} * (0.065) ^{-2.5}\\\tau = 9.28 * 10^{12} years$

The star is a brown dwarf, it cannot fuse hydrogen at its core

3) $0.9M_{sun}$ white dwarf; single star(not binary)

$\tau = 10^{10} * (0.9) ^{-2.5}\\\tau = 1.30 * 10^{12} years$

At this time, a lot of its initial radiation has been emitted and the temperature has become low. It is a cold white dwarf

4) 1 $M_{sun}$ main sequence star,; single star(not binary)

$\tau = 10^{10} * (1.0) ^{-2.5}\\\tau = 1 * 10^{10} years$

At this time, a lot of radiation will be emitted, the star is a hot white dwarf

5) 1.4 $M_{sun}$ white dwarf; binary with a red giant companion

$\tau = 10^{10} * (1.4) ^{-2.5}\\\tau = 4.31 * 10^{9} years$

At this time, it will continue to undergo a gravitational collapse from the nearest future, so It is a neutron star.

Answer from: Quest

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm. the wire diameter is d = 0.9 mm. the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2) in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

Answer from: Quest

Thick and thin filaments

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Here are five stars or star-like objects as we might observe them today. Eleven billion years from n...