Mass = 40.14 - 33.79= 6.35 gram
vol = 13.3 ml
density = m/v = 6.35/13.3 = 0.477 g/ml
Speed= distance/time
speed=117/25
speed=4.68m/sec
We know, Speed = Wavelength * Frequency
Speed = 32.4 * 3
Speed = 97.2 m/s
So, option D is your correct answer.
Hope it helped.
The 'strength' of the electric field is the force on 1C of charge at that point.
At this 'certain location', the field is 40/5 = 8 newtons per coulomb = <u>8 volts</u>
