The FREQUENCY of light remains unchanged once it leaves the source.
I would feel warm because putting cold and hot together is gonna be warm because with the cold it is cooling down the hot to make warm
Answer:
126 mWb
Explanation:
Given that:
length (L) = 50 cm = 0.5 m, radius (r) = 5 cm = 0.05 m, current (I) = 10 A, number of turns (N) = 800 turns.
We assume that the magnetic field in the solenoid is constant.
The magnetic flux is given as:

Answer: 
Explanation:
Given
Length of the race track 
the radius of curvature of the track 
time taken to run on track is 
Speed of runner is

Centripetal acceleration is

Moving a spring back and forth creates a longitudinal wave