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3 years ago

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Physics

1 answer:

Nana76 [90]3 years ago

5 0

Answer:

Electron shell

Nucleus

Neutrons

Explanation:

An atom is made up of three fundamental subatomic particles which are the protons, neutrons and electrons.

Protons are the positively charged particles. Neutrons do not carry any charges.
Both protons and neutrons are found in the tiny nucleus at the center of that atom.
The electrons are negatively charged.
They are found outside the nucleus in electronic shells.

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Last week we investigated the black hole at the center of our galaxy, with massMX= 8.5×1036kg. An object whose size is on the or

swat32

Answer:

$d=2.38*10^{13}m$

Explanation:

We know the mass of the hole, so we define as,

$M_x= {8.5*10^{36}}$ kg

For which centripetal force is equal to gravitational force

$\frac{mv^2}{r}=\frac{GMm}{d^2}$

Angular velocity is equal to v/r,

$w^2r=\frac{6.67*10^{-11}*8.5*10^{36}}{d^2}$

As r=1 and w=1, we clear to d,

$d^2=5.6695*10^{26}$ m

$d=2.38*10^{13}m$

6 0

4 years ago

According to the general theory of relativity, what are consequences of the curvature of space-time? Check all that apply. The d

Svetlanka [38]

Answer:

The dilation of time.

The falling of objects.

The changing of paths of light.

Explanation:

I have explained in the image attached below.

From the explanation, the correct ones are;

The dilation of time.

The falling of objects.

The changing of paths of light.

4 0

3 years ago

A sled is accelerating at 2 m/s2 because it is being pushed on ice by Jenny. Tommy then jumps on the sled (he has the same mass

Radda [10]

Answer:

The acceleration of the total mass decreases by half (1/2)

Explanation:

Given;

acceleration of sled = 2 m/s²

From Newton's second law of motion, F = ma

⇒m = F/a

F is the force applied by Jenny

This force applied by Jenny should be the same, after Tommy jumps on the sled, but the acceleration will change.

F = m₁a₁ = m₂a₂

Since m₂ = 2m₁, then we calculate a₂

m₁a₁ = 2m₁a₂

a₂ = a₁/2

Therefore,The acceleration of the total mass decreases by half.

7 0

3 years ago

A scientific theory is_____.

natta225 [31]

Answer:

B. A well-tested explanation for a widely accepted hypothesis

Explanation:

This is true about a scientific theory going by the fact of it being a well tested explanation. For example, in one of the Newtons law of motion which he stated to be<em> "To every action, there is equal and opposite reaction", </em><em>the hypothesis has been known till he was able to offer a well tested explanations with calculations showing that, it was actually true.</em>

6 0

3 years ago

A concave mirror produces a real image that is three times as large as the object. If the object is 20 cm in front of the mirror

TiliK225 [7]

Answer:

The image is produced 60 cm behind the mirror

The focal length of the mirror is 30 cm

Explanation:

u = Object distance = 20 cm

v = Image distance

f = Focal length

m = Magnification = 3

$m=-\frac{v}{u}\\\Rightarrow 3=-\frac{v}{20}\\\Rightarrow v=-3\times 20\\\Rightarrow v=-60\ cm$

The image is produced 60 cm behind the mirror

$\frac{1}{f}=\frac{1}{u}+\frac{1}{v}\\\Rightarrow \frac{1}{f}=\frac{1}{20}+\frac{1}{-60}\\\Rightarrow \frac{1}{f}=\frac{1}{30}\\\Rightarrow f=\frac{30}{1}=30\ cm$

The focal length of the mirror is 30 cm

8 0

3 years ago