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natima [27]
3 years ago
6

how do scientists know that black holes exist A. by running experiments on the sun B. by observing objects and light around blac

k holes C. by viewing black holes with powerful telescopes D. all of the above E. none of the above
Physics
2 answers:
NNADVOKAT [17]3 years ago
8 0

Answer:

E. none of the above

Explanation:

I hope thats right

bulgar [2K]3 years ago
5 0

Answer:

Answer choice D)

Explanation:

even though they don’t emit light, they do have lots of gravity.

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Help quick<br> p;leaseeeeeeeeeeee its about direction and magnitude
KonstantinChe [14]

Explanation:

The net force of each square is the combination of the forces in each direction. The direction is the... direction the square would go in due to the net force. The magnitude of the net force is how large it is. So if you had a force pushing 2N to the left and 1N to the right, then the net force would be 1N to the left; because the two oppose eachother. If they were going in the same direction, then they'd add to each other. And perpendicular net forces (like one pushing up and another pushing left) can create net forces in diagonal directions.

I'm not going to do all of these for you because they're basically all the same thing and it's good practice for you anyway. But I'll do the first three just so you can get the idea:

1. The net force's magnitude is 4N and it's direction is to the right.

2. The net force's magnitude is 4N and it's direction is to the left.

3. The net force's magnitude is 0N and it has no direction because they are equal forces acting in opposite directions.

7 0
3 years ago
What is newtons law?
Bas_tet [7]
When considering newtons laws, we would understand that this would first, be when, a object is at rest, it remains at rest, when a object is at speed, it remains in speed, unless there were to be a object to go against it. This would just be an example if one of his laws.
8 0
3 years ago
A resultant force of magnitude 15 N acts on a body of mass 250 g. Calculate the magnitude of the acceleration
lakkis [162]

Answer:

a=60

Explanation:

F=ma

F=15N

m=250g convert to kg

m=250/1000

m=0.25kg

applying F=ma

15=0.25*a

a=15/0.25

a=60

4 0
3 years ago
Can nuclear be reused? Why or why not? Use in your own words.
never [62]

Answer:

Yes because:

Nuclear energy's waste can be reused because the sun is a store of nuclear energy.

6 0
3 years ago
Which of the following is the correct SI unit measuring amount of material contained in a solid sphere
qaws [65]
I think it's kilograms (kg)
3 0
3 years ago
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