The correct option is B. twice.
If a black hole suddenly doubled in mass, the event horizon would become <u>twice</u> its original size.
What is a blackhole?
In space, a black hole is a location where gravity pulls so strongly that even light cannot escape. Because stuff can fit into such a small space thanks to gravity, this is a strength of our universe. When a star dies, things like this may occur.
No light can escape, so people cannot perceive black holes. They are invisible. The search for black holes can be aided by space telescopes equipped with exceptional instruments. The special equipment can detect how stars that are very close to black holes behave differently from other stars.
What is event horizon?
The border around a black hole from which nothing (not even light) can escape is known as the "event horizon." In other words, an object inside the event horizon has an escape velocity that is faster than light. The name is derived from the fact that nothing occurring inside it can be seen; it is an invisible horizon. As a result, the event horizon successfully conceals the singularity at the center of the black hole, which is a relief for astrophysicists who are troubled by how the laws of physics break down at such a location.
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Answer: Voltage, V=120V; Power,P=10kW or 10,000W
P = V*I (where I is current)
∴ I = P/V =10000/120 = 83.3A
Resistance, R = V/I = 1.44 ohms
Power Factor(cosФ)= 0.9 = Resistance, R/Impedance, Z
∴ Z = 1.44/0.9 = 1.6 ohms
Explanation: The three-phase inductive load supply carries alternating current of the same frequency and voltage amplitude relative to a common reference but phase difference of one third of a cycle between each of three voltages and currents.
300
Explanation:
100 x 3 =300 simple and easy
The magnitude of force acting on wire will be 1.90 N and the direction of the force acting on the wire will be 41.9 degrees below the negative y axis.
Explanation:
It is known that the force acting on a current carrying conductor placed in a magnetic field is
Here B is the magnetic field, I is the current flowing through the wire and L is the length of the wire which is given as 44 cm.
Since the wire is bended in the middle at right angle so the length of the two sides of the wire will be 22 cm each. Also one part is lying over z axis and another part lies in the plane of xy in the equation of line y = 2x. So the slope of this wire will be
This will be equal to tan θ.
So θ = tan⁻¹ (2) =63.4°
Then, the length of the wire will be written as components of i, j and k.
Then,
F = I (L × B)
![F = 20.5 (\left[\begin{array}{ccc}i&j&k\\0.098&0.197&-0.22\\0.316&0&0\end{array}\right] )](https://tex.z-dn.net/?f=F%20%3D%2020.5%20%28%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Di%26j%26k%5C%5C0.098%260.197%26-0.22%5C%5C0.316%260%260%5Cend%7Barray%7D%5Cright%5D%20%29)
The magnitude of force on the wire will be
And the direction can be found by the tan inverse of the ratio of k component to j component of the force.
So the magnitude of force acting on wire will be 1.90 N and the direction of the force acting on the wire will be 41.9 degrees below the negative y axis.
<span>Heat comes from stove flame to the sauce pan by radiation through infrared energy, heat conducts the metal of the sauce pan; Convection brings cool water to the hot surface at the bottom of the hot sauce pan until all or most of the water is hot enough to boil.</span>
