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jok3333 [9.3K]
3 years ago
11

How do scientists infer the presence of black holes since they can't be directly observed?

Mathematics
1 answer:
Andrej [43]3 years ago
7 0

Answer:

The presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation such as visible light. Matter that falls onto a black hole can form an external accretion disk heated by friction, forming quasars, some of the brightest objects in the universe.

Step-by-step explanation:

You might be interested in
What is the distance between the points (7, 8) and (-8, 0) on a coordinate grid?
Verizon [17]

Answer:

17 units

Step-by-step explanation:

7 0
2 years ago
The manager of hockey team says that the probability that team win the next match is 0.5 and the probability it will lose is 0.2
dybincka [34]

Answer:

Step-by-step explanation:

The team draws with a probability of 1 = (0.5 + 0.2) = 0.3

If the team does not win then it loses or draws.

Loosing = 0.2

Draw := 0.3

P(not win) = 0.2 + 0.3 = 0.5

======================

Not lose means wins or draws.

P(not lose) = 0.5 + 0.3 = 0.8

======================

Not Draw means wins or loses

P(not draw) = 0.5 + 0.2 = 0.7

Of course all of these could be done more directly.

P(not win)= (1 - win) = 1- 0.5 = 0.5

P(not lose) =  ( 1 - lose) = 1 - 0.2 = 0.8

P(not draw) = (1 - 0.3) = 0.7

3 0
3 years ago
Kendra spends $15 buying fabric to make baby blankets.She can make 4 blankets from one pice of fabric.If she sells the blankets
ra1l [238]

Answer:

her profit is $25

Step-by-step explanation:

Given that

She spends $15 for purchasing fabric so that she make the baby blankets

And, she can make 4 blankets from one piece of fabric

Now she sold the blankets for 10 each

So we need to find out the profit

As we know that

Profit = Selling cost - purchasing cost

= (4 × $10) - $15

= 40 - $$5

= $25

hence, her profit is $25

5 0
3 years ago
Q7: Determine the graph of the polar equation r = 12/6+4n cos theta.
iVinArrow [24]

Answer:

Choice B

Step-by-step explanation:

The first step is to write the polar equation of the conic section in standard form by dividing the numerator and denominator by 6;

r=\frac{2}{1+\frac{2}{3}cos theta }

The eccentricity of this conic section is thus 2/3, the coefficient of cos theta. Clearly, the eccentricity is between o and 1 implying that this conic section represents an Ellipse.

Lastly, the ellipse will open towards the left since we have positive cos theta in the denominator. The only graph that meets the conditions is graph B.

3 0
3 years ago
9/10 + (−4/5) in simplest form
creativ13 [48]
-4/5 = -8/10
9/10 -8/10 = 1/10

1/10
5 0
3 years ago
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