A superheated cloud of gas and dust swirling around a massive object (usually a black hole or neutron star) is called an accretion disk. The correct option is c.
<h3>What is accretion disk?</h3>
Accretion disk is a heavy object surrounded by flow of gas, plasma, dust, or particles. The materials surrounding the heavy object orbiting in the gravitational field of the object that loses energy and angular momentum as it slowly spirals inward.
This cloud can reach incredible speeds and temperatures as gravity causes it to build up more and more friction, eventually releasing x rays.
Thus, accretion disk is a superheated cloud of gas and dust swirling around a massive object.
Learn more about accretion disk.
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Answer: V-final= {F*{d/v¹}} /{m1 + m2}
Explanation: From Newton's second law we know that impulse that is force multiplied by time is equal to change in momentum.
Therefore the momentum before collision would be
F*t
But time t = distance (d)/velocity(V1)
t = d/V1
Momentum before collision
=F * {d/v1}.
Also, from the question we were told after collision the two balls stuck together. That statement means that they move with a common ( same) velocity after collision.
Therefore,
Momentum after collision
= {m1+m2}*V-final
From the law of conservation of momentum which state that the sum of momentum before collision is EQUAL to the momentum after collision. We have that,
F*{d/v1} = {m1+m2}*V-final
Making V- final subject of the formula we have that,
V-final = {F*{d/v1}} / {m1+m2}
NOTE: The momentum of a body is the product of it's mass and velocity. That is M* V.
Answer:
The sound intensity of source #2 is 38.3 W/m²
Explanation:
Given;
sound intensity of source #1, I₁ = 38.3 W/m²
sound intensity of source #2, I₂ = 2.6 dB greater than 38.3 W/m²
To determine he sound intensity of source #2 in W/m², we must convert 2.6 dB to sound intensity in W/m².
Thus, sound intensity of source #2 = 38.3 W/m² + 1.8197 x 10⁻¹² W/m² = 38.3 W/m²
Therefore, the sound intensity of source #2 is 38.3 W/m²
Explanation:
The answer is in the pic above