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3 years ago

If the force of gravity suddenly stopped acting on the planets, they would

Physics

2 answers:

stepladder [879]3 years ago

6 0

They would explode. lol.

Afina-wow [57]3 years ago

3 0

<span>If this were to happen, they would slowly spiral to the sun and continue to orbit the sun, thus moving in straight lines, tangent to their orbits, and slowly spiral away from the sun. </span>

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The blackbody emission spectrum of object A peaks in the ultraviolet region of the electromagnetic spectrum at a wavelength of 2

seraphim [82]

Answer:

A) Object A is 3.25 times hotter.

B) Object A radiates 111.6 times more energy per unit of area.

Explanation:

Wiens's law states that there is an inverse relationship between the wavelength in which there is a peak in the emission of a black body and its temperature, mathematically,

$\lambda_{peak}= \dfrac{0.0028976}{T}$ ,

where $T$ is the temperature in kelvins and, $\lambda_{peak}$ is the wavelenght (in meters) where the emission is in its peak.

From here, if we solve Wien's law for the temperature we get

$T=\dfrac{0.0028976}{\lambda_{peak}}$ .

Now, we can easily compute the temperatures.

For object A:

$T_{A}=\dfrac{0.0028976}{200*10^{-9}}$

$T_{A}=14488K$ .

For object B:

$T_{B}=\dfrac{0.0028976}{650*10^{-9}}$

$T_{B}=4458K$

From this, we get that

$T_{A}/T_{B}=3.25$ ,

which means that object A is 3.25 times hotter.

Stefan's Law states that a black body emits thermal radiation with power proportional to the fourth power of its temperature.

This is

$E=\sigma T^{4}$ ,

where $\sigma=5.67*10^{-8}\ Wm^{-2}K^{-4}$ is call the Stefan-Boltzmann constant.

From this, power can be easily compute:

$E_{A}=(5.67*10^{-8}*(14488)^{4})=2.5*10^{9}W\\E_{B}=(5.67*10^{-8}*(4458)^{4})=22.4*10^{6}}W$ ,

and we can notice that

$E_{A}/E_{B}=111.6$ ,

which means that object A radiates 111.6 time more energy per unit of area.

8 0

3 years ago

Children are sled riding on a hill One little girl pulls her sled back up the hill and does 379.5 joules of work while pulling i

Serggg [28]

Answer:

2.2N

Explanation:

Given parameters:

Work done = 379.5J

Height = 173m

Unknown:

Amount of force exerted on the sled = ?

Solution:

The amount of force she exerted on the sled is the same as her weight.

Work done is the force applied to move a body through a distance.

Work done = mgh

m is the mass

g is the acceleration due to gravity

h is the height

mg = weight;

Work done = weight x h

379.5 = weight x 173

weight = $\frac{379.5}{173}$ = 2.2N

4 0

3 years ago

1) La longitud del brazo de potencia de una palanca es de 0,0035 hectómetros y la del brazo de resistencia es de 55 centímetros.

Arlecino [84]

Answer:

Entonces seria 127 para vencer.

Explanation:

espero averte ayudado:-)

6 0

3 years ago

1)a persons ________ will change if they move from the earth to the moon

fgiga [73]

A person's weight will change if they move from the earth to the moon. This does not however, change the person's mass. Mass is the amount of matter that makes up an object, and volume is how much space it takes up. On the moon, there is a lighter gravitational pull on said person, so they will not weigh as much if they stepped on a scale.

3 0

3 years ago

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PLEASE HELP WILL GIVE BRAINLIEST

Greeley [361]

Answer:C

Explanation:BECASE THEY ARE ONE OF THE PEST KILLERS SRY BUT IM THE MYSTER MAN WHOOOSH ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? OH AND PLS FOR BRAINIEST

5 0

3 years ago