Answer:
292.3254055 W/m²
469.26267 V/m
Explanation:
P = Power of bulb = 90 W
d = Diameter of bulb = 7 cm
r = Radius =
= Permittivity of free space =
c = Speed of light =
The intensity is given by
5% of this energy goes to the visible light so the intensity is
The visible light intensity at the surface of the bulb is 292.3254055 W/m²
Energy density of the wave is
Energy density is also given by
The amplitude of the electric field at this surface is 469.26267 V/m
Amplitude of a magnetic field is given by
The amplitude of the magnetic field at this surface is
Answer:
Time taken by the object is 0.012 s .
Explanation:
Given :
Frequency , f = 3.5 Hz .
Amplitude , A = 0.15 m .
At time t = 0 , x = 0 m.
Since , at time t = 0 , x = 0 m .
Therefore , equation of displacement is :
...equation 1.
Here , is angular frequency and is given by :
We need to find the time at which its displacement is ,
Putting all these value in equation 1 we get ,
Hence , this is the required solution.
Answer:
I think 0.89 m/s... I'm not 100% sure.
Explanation:
Answer:
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A straight line represents a constant. It means that the speed is changing constantly in equal amounts over equal periods of time.