Lets Conserve Natural Resource

Richard Sitaula - 10.5/ 18 Shreejesh Karki - 7.5 ( Re-exam)/ 15 Samyam Shrestha - 13.5/ Kumud Sitaula - 16/ 18 Malaika Sajjad - 14.5/ 18 Pratik Mainali - 11/ 20 Kritana Neupane - 11/ 11 Khubeb Akik - 12.5/ 14 Khizer Ishaq - 11.5/ 15 Dawa Sherpa - 11 Bikalpa Kunwar - 11/ 19 Anushka Karki - 11/ 20 Ansel Dhungana - 18 ( Congratulations) Sujal Sharma - 13 Suyog Dahal - 12 Swayam Syangtan - 11/ 16 Tenzing Gyatcho - 4 ( Re-exam)/ 14 Mon Magar - 11.5 Nawang Jigme -13.5/ 15 Aaisha Ansari - 14 Samyam Jung Gurung - 10 Pembakee Sherpa - 18

- Invertebrates - Circulation in Human Body - Environmental Pollution and its Management - Energy - Heat

R1- Defining lens along with their types and describing ray diagram of concave lens. R2 - Describing ray diagram of convex lens. R3 - Defining magnification and power of lens and solving numerical related to them. R4 - Defect of vision and correction measure. Deadline of Submission : 17th July ( Wednesday) @8.00 p.m. Mailing ID : harilama@bis.edu.np ( Note: Failure to submit on stipulated date and time will not be entertained for presentation.)

1. How much heat must be added to raise the temperature of 200 g of water from 15 0 C to 85 0 C? ( 58800J) 2. An electrical kettle contains 200gm of water at 20 0 C. How much heat is to be supplied in order to boil the water? (Assume that the water boils at 100 0 C and the kettle takes no heat) ( 67200J) 3.  A brass rod of 0.4 kg mass at 100 0 C is dropped into 1.0 kg of water at 20 0 C. The final temperature is 23 0 C. Calculate the specific heat capacity of brass. ( 409.09 J/Kg0C) 4. The temperature of 20 kg water in the radiator of engine of a car is 30 0 C. If the temperature of water increases upto 100 0 C after the engine is heated, what quantity of heat will the water absorb? (Ans: 5.88  x  106 J ) 5.  What will be the quantity of heat required to raise the temperature of 2kg paraffin by 10 0 C if 44000 joules of heat energy is required to raise the temperature of the paraffin by 200C?  (Ans: 4.4  x  10 4  J ) 6.  Hot water of mass 7 kg at 98 0 C is cooled for tak

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