# Science

## Use a phasor diagram to show that the resultant amplitude of two waves ๐ธ1 = ๐ธ๐๐ ๐๐๐ฝ ๐ธ2 = ๐ธ๐๐ ๐๐(๐ฝ + ๐)

Use a phasor diagram to show that the resultant amplitude of two waves ๐ธ1 = ๐ธ๐๐ ๐๐๐ฝ ๐ธ2 = ๐ธ๐๐ ๐๐(๐ฝ + ๐) EXPERT ANSWER

## 02 Draw the condensed structural formula of the product of the following reactions (if no reaction, write NR): (Ol a. CH3-CH2-CH2-OH OH b. CH3- CHCH2CHa OH c. [Ol

EXPERT ANSWER These all reactions are oxidation reactions. In part a, the alcohol is primary, so it will convert to aldehyde or carboxylic acid. As nascent oxygen is used, so it is converted directly to carboxylic acid. In part b and c, these are secondary alcohols, so they will be oxidised to ketone.

## 14. Light with a wavelength of 646 nm passes through two slits and forms an interference pattern on a screen 8.75 m away. The distance between the central bright fringe and the second-order bright fringe is 5.16 cm. What will be the distance between the central bright fringe and the third-order minimum! A) 0.13 m B) 0.18 m C) 0.24 m D) 0.34 m E) 0.47 m

EXPERT ANSWER According to question, light has wavelength,  = 646 nm = 646 * 10-9 m. distance of screen from slits, D = 8.75 m Distance between central bright fringe and second order bright fringe is, y = 5.16 cm = 5.16 * 10-2 m. i.e for n = 2 Since, for maxima Where d is distance between …

## i. Project Fili: an X-ray telescope (ฮปโ0.1โ1 nm) in Antarctica for studying black holes. ii. Project Kili: a visible-light telescope (ฮปโ400โ700 nm) in Hawai’i for studying galaxy formation.

Imagine that you are in charge of allocating funding from the national science foundations to build one or more proposed observations.ย For each of the pair below determine which one would be better to fund and clearly explain your reasoning. EXPERT ANSWER Its better to fund the project kili. Project Kili involves setting up a visible …