3 years ago

Question 5 of 10

Physics

1 answer:

spayn [35]3 years ago

4 0

Answer: A) 0.19 kg.m/s South just answered it right on Apex!

Explanation:

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What is the average density of a neutron star that has the same mass as the sun but a radius of only 20.0 km?

IrinaK [193]

Answer: $5.935(10)^{13}g/cm^{3}}$

Explanation:

Density is a characteristic property bodies and materials, and is defined as the relationship between the mass $m$ and the volume $V$ , as shown below:

$D=\frac{m}{V}$ (1)

In the case of the neutron star, we know it has the same mass as the Sun:

$m=1.989(10)^{30}kg$

And its radius is $r=20km$

On the other hand, if we assume this neutron star has a spherical shape, its volume can be calculated by the following formula:

$V=V_{sphere}=\frac{4}{3}\pir^{3}$ (2)

$V=\frac{4}{3}\pi(20km)^{3}$ (3)

$V=33510.321km^{3}$ (4)

Substituting (4) in (1):

$D=\frac{1.989(10)^{30}kg}{33510.321km^{3}}$ (5)

Finally:

$D=5.935(10)^{25}kg/km^{3}}=5.935(10)^{13}g/cm^{3}}$

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3 years ago

8. What is the momentum of a 120-kg professional fullback running<br> across the line at 11.2 m/s?

Alchen [17]

Answer:

134r kgm^-1 or 1344 kg /m

Explanation:

Momentum is is given by:

p=mv

Where:

p is momentum, m is mass in kg and v is velocity in ms−1

p=120kg×11.2 m/ s= 1344 kgms=1344kgm^−1

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A 3.75 bucket of water attached to a rope is swung in a 0.555 m circle. At the bottom, the tension in the rope is 172 N. What is

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What particles of an atom are inside the neuculas?

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*It's nucleas. There are protons, neutrons and electrons.

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A large, semi-truck hauling a full load and a small car are traveling in the same direction. As they approach a sharp curve in t

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Semi-truck because it has more inertia

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