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Q 2 Within a certain distance of a black hole, not even light can escape. This distance is called the "event horizon." (This was discussed in the online question box earlier this month.) The speed of light is 3.0 ·10* . Even though our equation from part 1 does not hold exactly when considering light beams, we can still use it to get a good estimate of the size of a black hole. Estimate the radius of a black hole with the same mass as our sun (2.0.10³º kg ).. (For comparison, our sun has a radius of about 7.0-10° m.)

Q 2 Within a certain distance of a black hole, not even light can escape. This distance is called the "event horizon." (This was discussed in the online question box earlier this month.) The speed of light is 3.0 ·10* . Even though our equation from part 1 does not hold exactly when considering light beams, we can still use it to get a good estimate of the size of a black hole. Estimate the radius of a black hole with the same mass as our sun (2.0.10³º kg ).. (For comparison, our sun has a radius of about 7.0-10° m.)

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When you throw a ball into the air, it usually falls back down. If you throw it a little harder, it will take it longer to fall back down. You can throw it so hard that it never falls back down to Earth. This launch speed is called the escape velocity. When you are far from Earth, the potential energy of an object with mass m can no longer be written as PE = mgh. Instead, we must use the equation М-т PE = -G .. 1" M is the mass of the planet you launch from. m is the mass of the object being launched. r is the distance from the center of the planet to the object being launched. G is a universal constant called the gravitational constant (6.67-10-" ). kg-s Notice that the potential energy is 0 when you are infinitely far away from the planet, and negative as you get closer.
Transcribed Image Text:When you throw a ball into the air, it usually falls back down. If you throw it a little harder, it will take it longer to fall back down. You can throw it so hard that it never falls back down to Earth. This launch speed is called the escape velocity. When you are far from Earth, the potential energy of an object with mass m can no longer be written as PE = mgh. Instead, we must use the equation М-т PE = -G .. 1" M is the mass of the planet you launch from. m is the mass of the object being launched. r is the distance from the center of the planet to the object being launched. G is a universal constant called the gravitational constant (6.67-10-" ). kg-s Notice that the potential energy is 0 when you are infinitely far away from the planet, and negative as you get closer.
Q 2 Within a certain distance of a black hole, not even light can escape. This distance is called the "event horizon." (This was discussed in the online question box earlier this month.) The speed of light is 3.0 -10 . Even though our equation from part 1 does not hold exactly when considering light beams, we can still use it to get a good estimate of the size of a black hole. Estimate the radius of a black hole with the same mass as our sun (2.0-10³º kg ).. (For comparison, our sun has a radius of about 7.0.10° m.)
Transcribed Image Text:Q 2 Within a certain distance of a black hole, not even light can escape. This distance is called the "event horizon." (This was discussed in the online question box earlier this month.) The speed of light is 3.0 -10 . Even though our equation from part 1 does not hold exactly when considering light beams, we can still use it to get a good estimate of the size of a black hole. Estimate the radius of a black hole with the same mass as our sun (2.0-10³º kg ).. (For comparison, our sun has a radius of about 7.0.10° m.)
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