Mopeds (small motorcycles with an engine capacity below 50 cm3) are very popular in europe because of their mobility, ease of operation, and low cost. the article “procedure to verify the maximum speed of automatic transmission mopeds in periodic motor vehicle inspections” (j. of automobile engr.,2008: 1615–1623) described a rolling bench test for determining maximum vehicle speed. a normal distribution with mean value 46.8 km/h and standard deviation 1.75 km/h is postulated. consider randomly selecting a single such moped. a.what is the probability that maximum speed is at most 50 km/h? b. what is the probability that maximum speed is at least 48 km/h? c. what is the probability that maximum speed differs from the mean value by at most 1.5 standard deviations?

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle  

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.