The amount of solar energy received by earth is given. Mass of solar energy converted to energy over a 24 -hour period to provide the daily amount of solar energy to the earth is to be calculated. Mass of coal required to be burned to provide the same amount of energy is to be stated. Concept introduction: Energy change of a system can be calculated by Einstein’s theory of relativity . When a system loses or gains energy, it also gains or loses a quantity of mass given by E/c 2 . To determine: Mass of solar energy converted to energy over a 24 -hour period to provide the daily amount of solar energy to the earth and the mass of coal required to be burned to provide the same amount of energy.

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NGLISH b) Identify the bonds present in the molecule drawn (s) above. (break) State the function of the following equipments found in laboratory. Omka) a) Gas mask b) Fire extinguisher c) Safety glasses 4. 60cm³ of oxygen gas diffused through a porous hole in 50 seconds. How long w 80cm³ of sulphur(IV) oxide to diffuse through the same hole under the same conditions (S-32.0.0-16.0) (3 m 5. In an experiment, a piece of magnesium ribbon was cleaned with steel w clean magnesium ribbon was placed in a crucible and completely burnt in oxy cooling the product weighed 4.0g a) Explain why it is necessary to clean magnesium ribbon. Masterclass Holiday assignmen PB 2

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Chapter 19, Problem 42E

Interpretation Introduction

Interpretation: The amount of solar energy received by earth is given. Mass of solar energy converted to energy over a 24 -hour period to provide the daily amount of solar energy to the earth is to be calculated. Mass of coal required to be burned to provide the same amount of energy is to be stated.

Concept introduction: Energy change of a system can be calculated by Einstein’s theory of relativity. When a system loses or gains energy, it also gains or loses a quantity of mass given by E/c2 .

To determine: Mass of solar energy converted to energy over a 24 -hour period to provide the daily amount of solar energy to the earth and the mass of coal required to be burned to provide the same amount of energy.

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