To find black holes in space, scientists use telescopes to study visible light, X-rays, and radio waves. When gas orbits a black hole, it gets very hot and starts emitting X-rays and radio waves. Through special telescopes, the area surrounding the black hole looks really bright.
Would that be 10?
.1 second per revolution, so 10 rps
Answer:
(a) 62.69 nJ/m^3
(b) 1015.22 μJ/m^3
Explanation:
Electric field, E = 119 V/m
Magnetic field, B = 5.050 x 10^-5 T
(a) Energy density of electric field =
= 6.269 x 10^-8 J/m^3 = 62.69 nJ/m^3
(b) energy density of magnetic field =
= 1.01522 x 10^-3 J/m^3 = 1015.22 μJ/m^3
Answer:
<h3>
The magnitude of average induced emf = 0.229 mV </h3>
Explanation:
Given :
Radius of circular loop m
Initial magnetic field T
Final magnetic field T
Difference of magnetic field
Time interval sec.
According to the theory of electromagnetic induction,
Average emf =
Where magnetic flux =
Where area of loop =
Average emf =
Magnitude of average emf = mV
Thus, the magnitude of average induced emf = 0.229 mV