Answer:
sound waves need a medium to travel on because the molecules of the solid liquid gas etc... it carries sound waves from one point to another. which goes for other substances sound cannot travel through the vaccum Because the vaccum has no molecules and the vibration that is needed to carry the sound waves
Explanation:
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D.as a magnet is being thrust through the coil
Answer:
3.06km/hr
Explanation:
Average speed (km/hr) = distance (km)/time(hr)
Total average speed = 152/10
= 15.2km/hr
For the first 85km which he drove for 7hours, average speed = 85/7
= 12.14km/hr
His average speed in km/h for the remaining journey will, therefore, be:
15.2km/hr - 12.14km/hr
= 3.06km/hr
Answer: relative motion between observer and the sound source.
Explanation: The Doppler effect states that when there is a relative motion between an observer and a sound source the frequency of sound perceived by the observer is different in frequency from the original from the source.
The mathematical back up for this claim is given below.
f' = (v+v') /(v-vs) × f
Where f' = observed frequency
v = speed of sound in air
v' = velocity of observer
vs = velocity of source
f = frequency of sound source.
From the formulae, it can be seen that a change in the value of the velocity of observer (v') and source (vs) produces different value of observed frequency (f').
Note, frequency of sound (f) is a constant.
Answer:
2630250 N/C, horizontally left
0
1434.825 N/C, horizontally left
Explanation:
m = Mass of particle
u = Initial velocity =
v = Final velocity = 0
t = Time taken
s = Displacement = 3.5 cm
q = Charge of particle =
Force is given by
Acceleration is given by
Magnitude of electric field is 2630250 N/C
Direction is horizontally to the left
The angle counterclockwise from left is zero.
The time taken is
Acceleration is given by
Magnitude of electric field is 1434.825 N/C
Direction is horizontally to the left