Question Library

V = \(\frac{2d}{t}\) v = 340ms\(^{-1}\) t = 0.5s d= ? d = \(\frac{2d}{2} = \frac{340 \times 0.5}{2}\) = 85m

\(\Delta\) = \(\frac{\bigtriangleup\theta}{\delta} = \frac{80-20}{0.02}\) = 3.0 x 10\(^{3}\)km\(^{-1}\)

No expanded working has been attached for this question yet. The verified answer is Option A.

\(f_0\) = 40\(H_3\) 1st overtone = 2\(f_0\) = 80\(H_3\) 2nd overtone = 3\(f_0\) = 120\(H_3\) 3rd overtone = 4\(f_0\) = 160\(H_3\) 4th overtone = 5\(f_0\) = 200\(H_3\) \(\therefore\) Number of overtones between 40\(H_3\) and 180\(H_3\) = 3

A normal arrangement is an arrangement where the principal focus of objective coincides with the eyepiece so that the final image is at infinity

A mixture is a material made up of two or more different chemical substances which are not chemically combined. Mercury is a chemical element with the symbol Hg and atomic number 80.

Kerosene contains hydrocarbon with twelve to eighteen carbon atoms per molecule

Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. Familiar substances that sublime readily include iodine, dry ice, menthol, and camphor.

Atomic weight, also called relative atomic mass, ratio of the average mass of a chemical element's atoms to some standard.

The N shell is the fourth orbit with 32 max number of electrons using 2n\(^2\)

mass number, is the sum of the numbers of protons and neutrons present in the nucleus of an atom.

Avogadro's number is an absolute number: there are 6.022\times10\(^23\) elementary entities in 1 mole. helium has a molar mass of 4.0 grams per mole. So one mole of helium has a mass of 4.0 grams.

One mole of carbon dioxide molecules has a mass of 44.01 g, : 5 mole of carbon dioxide molecules has a mass of 220g

An atom nucleus is made up of protons and neutrons. An electron is a negatively charged subatomic particle that orbits the nucleus of an atom.

- Hydrolysis is any chemical reaction in which a molecule of water breaks one or more chemical bonds. -Salt hydrolysis is a reaction in which one of the ions from a salt reacts with water, forming either an acidic or basic solution.