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3 years ago

What would happen if the sun suddenly became a black hole without changing its mass?

Physics

1 answer:

Sloan [31]3 years ago

4 0

Answer:

It would shrink to a radius of 2.95 km

Explanation:

In order to be a black hole, the Sun must shrink so that its radius becomes equal to its Schwarzschild radius:

$r=\frac{2GM}{c^2}$

where

G is the gravitational constant

$M=1.99\cdot 10^{30} kg$ is the mass of the Sun

c is the speed of light

Substituting into the equation, we find

$r=\frac{2(6.67\cdot 10^{-11}m^3 kg^{-1} s^{-2})(1.99\cdot 10^{30} kg)}{(3\cdot 10^8 m/s)^2}=2950 m=2.95 km$

So, the Sun should shrink to a radius of 2.95 km.

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Development occurs:

Alex73 [517]

Answer:

Explanation:

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2 years ago

What type of wave has a wavelength?<br><br><br>

Viktor [21]

Answer:

. Radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays are all types of electromagnetic radiation.

Explanation:

Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.

4 0

3 years ago

A car is to be hoisted by elevator to the fourth floor of a parking garage, which is 48 ft above the ground. If the elevator can

belka [17]

Answer: 21.91 s

Explanation:

Given that,

Maximum height of the car, h = 48 ft

Acceleration of the elevator, a = 0.6 ft/s²

Deceleration of the elevator, -a = 0.3 ft/s²

Maximum speed of the elevator, v = 8 ft/s

Initial speed of the elevator, u = 0

If when the elevator accelerate from 0 to maximum velocity, v.

Let s be the vertical distance traveled during acceleration.

v² = u² - 2as

s = (v² - u²) / 2a

s = (8² - 0) / 2*0.6

s = 64 / 1.2

s = 53.33 ft

If when the elevator decelerates from maximum velocity, v to zero.

Let S be the vertical distance traveled during deceleration

u² = v² + 2aS

S = (u² - v²) / 2a

S = (0 - 8²) / 2 * 0.3

S = -64 / 0.6

S = 106.67 ft

Since he sum of s and S (i.e s + S) is greater than 48 ft, then the elevator will switch from acceleration to deceleration

without reaching the maximum velocity. Below, the switching point is labeled y.

v² = u² + 2ay

y = v²/2a

Inserting this into the earlier deceleration equation, we have

-v²/2 = d * [48 - (v²/2a)], where

d = deceleration

a = acceleration

Therefore, v = [4.√6. a √-(a.b/a)] / b

Where b = acceleration - deceleration

v = 4.382 ft/s

Using this newly found v, we proceed to find our s

s = (u² + v²)/2a

s = 19.2 / 1.2

s = 16 ft

The transport times for each segment are found from

v = u + a*t, thus upward t1

4.382 = 0 + 0.6 * t

t = 4.382/0.6

t = 7.303 s

Also,

4.382 = 0 + 0.3 * T

T = 4.382/0.3

T = 14.607 s

The total travel time is then t + T =

7.303 + 14.607

Total time of travel is 21.91 s

5 0

3 years ago

How many neutrons does potassium have?

Sloan [31]

Answer:

the answer is 20 neutrons

Explanation:

6 0

2 years ago

Read 2 more answers

To move a refrigerator of mass 170 kg into a house, a mover puts it on a dolly and covers the steps leading into the house with

Arte-miy333 [17]

Explanation:

The given data is as follows.

mass (m) = 170 kg, Distance (s) = 9.6 m

Height (h) = 3.3 m, Force (F) = 1400 N

First, we will calculate the work performed by her as follows.

W = Fs

= $1400 N \times 9.6 m$

= 13440 J

Hence, minimal work necessary to lift the refrigerator is as follows.

U = mgh

= $170 kg \times 9.8 \times 3.3 m$

= 5497.8 J

Therefore, we can conclude that he performed 5497.8 J of work.

7 0

3 years ago