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Vaselesa [24]
3 years ago
8

Choose the correct description, of what happens to the electron speeds in a more massive white dwarf. Choose the correct descrip

tion, of what happens to the electron speeds in a more massive white dwarf. As the mass of a white dwarf increases, the pressure must increase to resist gravity. To do this, the electrons must move faster. As the mass of a white dwarf increases, the pressure must decrease to resist gravity. To do this, the electrons must move faster. As the mass of a white dwarf increases, the pressure must decrease to resist gravity. To do this, the electrons must move slower. As the mass of a white dwarf increases, the pressure must increase to resist gravity. To do this, the electrons must move slower.
Physics
1 answer:
tester [92]3 years ago
4 0

Answer:

As the mass of a white dwarf increases, the pressure must increase to resist gravity. To do this, the electrons must move faster.

Explanation:

A white dwarf also known as degenerate dwarf is a star or an electron degenerate matter and is as massive as the Sun but only about as large in size as planet Earth.

The maximum mass of a white dwarf is about 1.4 times the mass of the Sun.

Also, as the mass of a white dwarf increases, the pressure must increase to resist gravity and to do this, the electrons must move faster.

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Suppose the average mass of each of 20,000 asteroids in the solar system is 1017 kg. Compare the total mass of these asteroids t
blondinia [14]

Answer:

The mass of the asteroids is 0.000334896182184 times the mass of the Earth.

39929.4542466 m

Explanation:

Total mass of the asteroids

m_a20000\times 10^{17}=2\times 10^{21}\ kg

m_e = Mass of Earth = 5.972\times 10^{24}\ kg

The ratio is

\dfrac{m_a}{m_e}=\dfrac{2\times 10^{21}}{5.972\times 10^{24}}\\\Rightarrow \dfrac{m_a}{m_e}=0.000334896182184

The mass of the asteroids is 0.000334896182184 times the mass of the Earth.

Volume is given by

V=\dfrac{m}{\rho}\\\Rightarrow \dfrac{4\pi}{3\times 8} d^3=\dfrac{m}{\rho}\\\Rightarrow d^3=\dfrac{3\times 8}{4\pi}\dfrac{m}{\rho}\\\Rightarrow d=(\dfrac{3\times 8}{4\pi}\dfrac{m}{\rho})^{\dfrac{1}{3}}\\\Rightarrow d=(\dfrac{3\times 8}{4\pi}\dfrac{10^{17}}{3000})^{\dfrac{1}{3}}\\\Rightarrow d=39929.4542466\ m

The diameter is 39929.4542466 m

6 0
3 years ago
Un resorte se monta horizontalmente con su extremo izquierdo fijo. Conectando una balanza de
zavuch27 [327]

Translation of important question part (Google translation used)

Force of 6N causes a displacement of 0.03m. remove the balance and connect a body 0.5 kg to the end, pull it to move it 0.02 m, release it and see how it oscillates.

(a)Determine the spring constant.

(b)Calculate angular velocity, frequency, and oscillation period

Answer:

(a)K=200 N/m

(b) w= 20 rad/s f=3.2 Hz T=0.3125 s

Explanation:

(a)

From Hooke's law, we deduce that F=kx where F is applied force, k is spring constant and x is extension of the spring. Making k the subject of the formula then k=F/x and substituting F with 6 N and x with 0.03 m then k=6/0.03=200 N/m

(b)

Angular velocity, w is given by w= \sqrt{\frac {k}{m}} where m is the mass and k is spring constant calculated in part a above. Substituting mass with 0.5 kg and k with 200 N/m then

w= \sqrt{\frac {200}{0.5}}=20 rad/s

We know that frequency, f is given by f=\frac {w}{2\pi} and substituting 20 rad/s for w then

f=\frac {20}{2\pi}=3.1830988618379067153776752674502872406891\approx 3.2 Hz

Finally, oscillation period, T is usually the reciprocal of frequency hence T=1/f and substituting f with 3.2 Hz then T=1/3.2=0.3125 s

7 0
3 years ago
What percent of all. Bolts fire within a cloud
cricket20 [7]

more than 90%

hope this helps :)

6 0
4 years ago
Consider the line graph depicting the motion of two cars. What statement regarding the cars motion is accurate?
Rom4ik [11]

Answer:

Its C

Explanation:

I did it on usatestprep

5 0
3 years ago
What does the odometer of an automobile measure? Which of the following is moving faster? Justify your answer.
snow_tiger [21]
The odometer of an automobile measures the distance travelled by the vehicle. the car(b) is moving faster.
This can be explained as follows:
In order to compare the speed of both the vehicles and determine which one is moving faster, the speed of both the vehicles should be represented by the same unit.
Speed of scooter = 300 m/min
Converting this to km/hr,
Distance travelled by the scooter in 1 min= 300 m
Therefore, distance travelled by the scooter in 60min( or 1 hr ) = 18000m = 18 km
Speed of the car= 36 km/hr
Since the car travels a greater distance in 1 hr , we can say that it is moving faster.

Read more on Brainly.in - https://brainly.in/question/3796417#readmore
6 0
4 years ago
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