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chubhunter [2.5K]
3 years ago
15

The ___________ of a black hole is the radius from a black hole at which the escape velocity is approximately equal to the speed

of light.
Physics
1 answer:
Vinvika [58]3 years ago
3 0
The Photon Sphere is the radius  of the orbit.
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guapka [62]
The NUCLEUS is the center of the atom. it contains protons and NEUTRONS

protons have a POSITIVE charge

neutrons have a NEUTRAL charge

electrons have a NEGATIVE charge
6 0
3 years ago
An object is located 50 cm from a converging lens having a focal length of 15 cm. Which of the following is true regarding the i
Diano4ka-milaya [45]

Answer:

It is real, inverted, and smaller than the object.

Explanation:

First of all, we can use the lens equation to find the location of the image:

\frac{1}{q}=\frac{1}{f}-\frac{1}{p}

where

q is the distance of the image from the lens

f = 15 cm is the focal length (positive for a converging lens)

p = 50 cm is the distance of the object from the lens

Solving the equation for q,

\frac{1}{q}=\frac{1}{15 cm}-\frac{1}{50 cm}=0.047 cm^{-1}\\q=\frac{1}{0.047 cm^{-1}}=21.3 cm

The distance of the image from the lens is positive, so we can already conclude that the image is real.

Now we can also write the magnification equation:

{h_i}=-h_o \frac{q}{p}

where h_i, h_o are the size of the image and of the object, respectively.

Substituting p = 50 cm and q = 21.3 cm, we have

{h_i}=-h_o \frac{21.3 cm}{50 cm}=-0.43 h_o

So from this relationship we observe that:

|h_i| < |h_o| --> this means that the image is smaller than the object, and

h_i < 0 --> this means that the image is inverted

so, the correct answer is

It is real, inverted, and smaller than the object.

4 0
3 years ago
What is stomato and write its functions ​
Nataly_w [17]

Answer:

Stomata- In botany, a stoma (also stomate; plural stomata) is a tiny opening or pore that is used for gas exchange. They are mostly found on the under-surface of plant leaves. Its functions are- The gas exchange that occurs when stomata are open facilitates photosynthesis. Mark Brainliest Pls

Explanation:

8 0
4 years ago
A car travels with a constant velocity of 45km/hr for 20 sec. What distance does it cover
Flauer [41]

Explanation:

This is simple.

Convert the speed of 45km/h to metres per second (m/s):

45 * 1000m = 45000m per hour.

1 hour = 60 seconds * 60 minutes = 3600 seconds.

45000m/h / 3600 = 12.5m/s

(A quicker way is just to divide by 3.6)

So in 20 seconds it would cover:

12.5m/s * 20s = 250m.

A car travelling at 45km/h would travel 250 metres in 20s.

6 0
2 years ago
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An atom that has 7 protons 7 electrons and 6 neutrons
defon
The atom carbon is the answer
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