Marta, cato, and juan plan a skit to illustrate one of the methods of charging. marta and cato are walking together. each has one flower and one box of candy. juan offers cato a huge bouquet of flowers, but cato can’t take it because his hands are full. cato hands his flower to marta and then turns to juan to take the bouquet. marta walks away in one direction with two flowers and one box of candy. juan keeps the bouquet and walks away in the other direction. cato looks sad standing alone with only a box of candy. how does the skit model a method of charging? a) it models induction because an electron (a flower) transfers from cato to marta through direct contact. b) it models friction because an electron (a flower) transfers from cato to marta through direct contact. c)it models friction because the offer of flowers represents a charged object that causes an electron (a flower) to transfer from one object to another. d) it models induction because the offer of flowers represents a charged object that causes an electron (a flower) to transfer from one object to another.

Option D.

Explanation:

Methods of charging:

1. By friction: when two materials of different electro-negativities rub against each, electrons transfer from one material to another.

2. By induction: When a charged body is brought near an uncharged body, the later gets polarized.

3. By conduction: when electrons from one body to another uncharged while contact, it is known as charging by conduction.

Here, a flower is analogous to an electron. A box of candy is positive charge. A bouquet of flowers is like a charged body which is brought near an uncharged body. It induces charge on ti it by causing it to transfer electron to another.

Thus, option D is correct.

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.