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Questão 1
Questão
A Black Hole has mass MBH = 15 MSolar. What is its Schwarzschild radius?
Responda
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50.5 km
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44.24 km
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76 km
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100 km
Questão 2
Questão
A Black Hole has mass MBH = 1800MSolar. What is its Schwarzschild radius?
Responda
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150.5 km
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444.24 km
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5309.32 km
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8769.60 km
Questão 3
Questão
If the Schwarzschild radius of a Black Hole is 10 km, what is its mass?
Responda
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15 Msolar
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6.8 Msolar
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35 Msolar
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48 Msolar
Questão 4
Questão
Why black holes are black?
Responda
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Because they do not have any energy
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Because nothing escapes
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Because radiation does not escape
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Because light does not escape
Questão 5
Questão
What is at the center of a black hole?
Responda
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Another black hole
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A little galaxy
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The singularity point
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An X-ray source
Questão 6
Questão
What is a supermassive black hole?
Responda
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Black hole with mass similar to the sun
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Black hole with mass similar to Jupiter
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Black hole with mass similar to 3Msolar
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Black hole with mass (thousand - billion) Msolar
Questão 7
Questão
How did the Black Holes were predicted?
Responda
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By observation
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With radio telescopes
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With optical telescopes
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Mathematically using Einstein’s general relativity theory
Questão 8
Questão
Hawking radiation is black body radiation due to
Responda
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Electromagnetic effects
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Quantum effects
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Gravity effects
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Mechanical effects
Questão 9
Questão
Where is the Hawking radiation emitted?
Responda
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Near the singularity
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Near the horizon
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Near the Schwarzschild radius
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From particles orbiting the black hole
Questão 10
Questão
Two Black Holes have the following masses M1 = 100 Msolar and M2 = 40 Msolar . Show that Schwarzschild radius of the first black hole satisfies one of the relations given below. (Do not panic this is a really easy question!!. Hint: All you need is the relation that gives the Schwarzschild radius of a black hole. Look at the lecture slides.)
Responda
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