My guesses would be g. or F
Answer:
Poynting vector,
Explanation:
It is given that, The electric and magnetic fields of an electromagnetic wave are given by :
Electric field,
Magnetic field,
We need to find the Poynting vector for this wave. the Poynting vector is given by :
So, the Poynting vector for this wave is . Hence, this is the required solution.
Answer:
decreases.
Explanation:
When the aircraft is flies from the warm air into the colder air then its speed will be decreases.
as we know that
we know mach number is constant
so that here Mach number M is expressed as
M = .............................1
here u is Local flow velocity with respect to the boundarie and v is the speed of sound in the medium
If the aircraft flies from hot air to cold air, the speed of sound in the medium will decrease. But the Mach number remains constant. Therefore, the local flow velocity relative to the boundaries also decreases.