The carnival and fairground ride called "The Rotor" or "The Barrel" is a popular example in physics textbooks. Suppose such a ride has been designed so that the maximum force of static friction between riders and the carpeted wall is just sufficient to support the riders when it has radius R and turns at angular speed ω. R If the fair owner wants a new version of the ride that has twice the radius, but is otherwise similar, what new angular speed ω ′ would be needed for the new ride?A pulley that has a moment of inertia 3 4 M R2 and radius R rotates about an axis through its center. A string is wrapped around the disk and exerts a constant force 1 2 M g tangential to the disk. Find the tangential acceleration of a point on the rim of the disk.

explanation:

considering the bohr theory, the type of connection that requires the transfer the answer conuldn't be right

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.