It is slightly above 48 degrees celsius, so try 48.2 degrees celsius. If that doesn’t work try 48.1 degrees celsius.
Solution :
Let us consider the Gaussian surface that is in the form of a cylinder having a radius of r and a length of A which is 
.
The charged enclosed by the cylinder is given by,
(here, V = 
is the volume of the cylinder)
If 
is positive, then the electric field lines moves in the radial outward direction and is normal to Gaussian surface which is distributed uniformly.
Therefore, total flux through Gaussian cylinder is :
Now using Gauss' law, we get
or 
Therefore, the electric field is
Hence, option (d) is correct.
Answer: A. Radiation can move through empty space to transfer heat; conduction cannot.
Now unlike convection and conduction, radiation does not require matter to transfer heat. It also does not require a medium to transfer heat, crossing off the other options regardless.
I hope this helps!
Answer: black
Explanation:
A colour filter is a filter that lets only one colour pass through it. For example, a red filter lets only red colour pass through it, while a green filter lets only green light pass through it.
In this example, we have a red and blue jacket. At first, we put a red filter: this filter lets pass throuhg only the red light. Then, we put a green filter: this filter lets pass only green light through it. However, there is no green light coming from the previous filter (since only red light passes through it), so the jacket appears black (no colours).
