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4 years ago

How does gravity make a star

Physics

1 answer:

gavmur [86]4 years ago

5 0

Gravity pulls large masses of debris together, forming a star

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A housefly walking across a clean surface can accumulate a significant positive or negative charge. In one experiment, the large

Lisa [10]

Answer:

$4.56*10^8 \text{ electrons.}$

Explanation:

Since the fly accumulated a positive charge of +73pC, it must have lost an equal number of negative charge of -73pC to the surface (because the housefly was neutral to begin with).

Therefore, to answer our question we have to ask ourselves how many electrons combine to make -73pC of charge?

The answer is since one electron carries a charge of $-1.6*10^{-19}C$ , the number $n$ of electrons that make up -73pC $(-73*10^{-12}C)$ are

$n= \dfrac{-73*10^{-12}C}{-1.6*10^{-19}C/e}$

$\boxed{n= 4.56*10^8e.}$

Thus, the housefly lost about 456 million electrons to the surface!

4 0

4 years ago

Three balls are in water. Ball 1 floats, with half of it exposed above the water level. Ball 2, with a density less than the den

Ymorist [56]

Answer:

The magnitude of buoyancy force is equal to that of ball's weight.

Explanation:

Ball 1 is floating on water. Weight of ball 1 is Fg=m1g is acting vertically downward

Force of buoyancy FB = ρVdisg is acting vertically upward.

Net force acting on the ball is zero, FB=Fg

Answer

The magnitude of buoyancy force is equal to that of ball's weight.

4 0

3 years ago

Read 2 more answers

6. Calculate the pressure exerted on an elevator floor which has an

disa [49]

Answer:

Hope this helps you out if you could please leave 5 stars or brainiest thank you

3 0

3 years ago

How many atoms of oxygen in the chemical formula 2 Ca(CIO2)2? O 2 O 4 O 6 O 8

alexdok [17]

Answer:

I believe it's 8

Explanation:

3 0

3 years ago

A cosmic ray proton moving toward the Earth at 5.00 10 m/s 7 × experiences a magnetic force of 1.70 10 N −16 × . What is the str

EastWind [94]

Answer:

Magnetic field will be equal to $B=3\times 10^{-5}T$

Explanation:

We have given velocity of proton $5\times 10^7m/sec$

Magnetic force experienced by proton $F=1.7\times 10^{-16}N$

Charge on proton $q=1.6\times 10^{-19}C$

Angle between field and velocity $\Theta =45^{\circ}$

Force in magnetic field is equal to $F=qBVsin\Theta$

So $1.7\times 10^{-16}=1.6\times 10^{-19}\times 5\times 10^7\times B\times sin45^{\circ}$

$B=3\times 10^{-5}T$

So magnetic field will be equal to $B=3\times 10^{-5}T$

7 0

3 years ago