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vesna_86 [32]
3 years ago
6

The search for black holes involves searching for The search for black holes involves searching for Group of answer choices sing

le stars that emit large amounts of X-rays. a stellar core greater than 3 solar masses large spherical regions from which no light is detected. pulsars with periods less than one millisecond. pulsars that are orbited by planets.
Physics
1 answer:
trasher [3.6K]3 years ago
4 0

Answer:

Large spherical regions from which no light is detected

Explanation:

A black hole is an object that has an extremely high density such that it possesses very powerful gravitational force that prevents the escape of all objects including light from it, and consumes nearby objects.

Due to the power of the gravitational force of a black hole, at the center, objects are infinitesimally compressed resulting in the inapplicability of the concept of space and time and the location is known as a singularity

Therefore, the search for black holes involves searching for <em>large spherical regions from which no light is detected</em>.

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An object that weighs 2.450 N is attached to an ideal massless spring and undergoes simple harmonic oscillations with a period o
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The answer is B. 2.45 N/m.
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3 years ago
An object is in circular motion. how will the object behave if the centripetal force is removed?
Inessa [10]

The correct answer is

B. it would move in a line tangent to the circular path

In fact, the centripetal force is the only force that keeps the object in a circular trajectory, pulling the object towards the centre of the circle. When this force is removed, there are no other forces acting on the object, therefore for the law of inertia, the object will continue to move at constant velocity, therefore in the same direction (tangent to the circular path) at constant speed.

4 0
4 years ago
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John throws a rock down with speed 14 m/s from the top of a 30 m tower. If air resistance is negligible, what is the rock's spee
astra-53 [7]

The final velocity of the rock before it touches the ground is 28 m/s.

Answer:

Explanation:

As the rock is thrown down, this means the acceleration due to gravity will be exerting on the rock. So the rock will be exhibiting a free fall motion. Thus, the acceleration of the rock will be equal to the magnitude of acceleration due to gravity. Then using the third equation of motion, we can determine the final velocity of the rock provided the values for initial velocity, displacement and acceleration is given in the problem itself.

So the acceleration is equal to 9.8 m/s² due to its free fall motion and displacement will be equal to the height of the tower which is given as 30 m. And the initial speed of the rock is stated as 14 m/s. The initial speed is represented as u, final speed is represented as v, displacement is represented as s and acceleration is represented as a.

2as=v^{2}-u^{2}

Then, 2 × 9.8 × 30 = v²-(14)²

v²=784

v= 28 m/s

So the final velocity of the rock before it touches the ground is 28 m/s.

8 0
4 years ago
The rate at which current flows is measured in .
denpristay [2]

Answer:

Ampere

Explanation:

The ampere is the unit of measurement in the international system. Its equal to a coulomb/second. It can be describe as the rate of charges flowing throught a conductor

4 0
3 years ago
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A child looked at
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The answer to your question is A.
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2 years ago
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