std 6 science ch 15,dhoran 6 science swadhyaypothi ch 5,std 6 science path 15 swadhyaypothi,dhoran 6 vigyan ch 15 swa Adhyayanpothi,std 6 science ch 15, ધોરણ છ વિજ્ઞાન પાઠ પંદર આપણી આસપાસની હવા

A circular water fountain 6.6 m in diameter is surrounded by a path of width 1.5 m. The area of this path in square metres is-

Out of 100 students, 15 passed in English, 12 passed in Mathmatics, 8 in Science, 6 in English and Mathematics, 7 in Mathematics and Science , 4 in English and Science, 4 in all the three. Find how many passed (i) in English and Mathematics but not in Science. (ii) in Mathematics and Science but not in English. (iii) in Mathematics only. (iv) in more than one subject only.

Out of 100 students who appeared for the SSC examination from a school 15 students in English ; 12 students in Mathematics; 8 students in Sience 7 studens in Mathematics and Science; 4 students in English and Science 6 students in English and Mathematics; 4 students in all the three subjects could get First calss marks. How many of them have got First class marks.(ii) only in Science (i) only in Mathmatics

Many of us believe that science is something modern ...(1)... the truth is that ...(2)... has been using science for ...(3)... very long time. However, it has ...(4)... a greater effect on human lives in the last 25 ...(5)... 30 years than in the hundreds of years ...(6)... the invention of the plough. The ...(7)... gifts of science have modern life ...(8)... and comfortable. But science has ...(9)... the same time created new problems. one of these which may become ...(10)... in the years to come, is ...(11)... of "jet-lag". With the coming of modern jets. flying at more than 900 km/hr, the world ...(12)... very small indeed. Today if you ...(13)... New Delhi at 4.00 in the morning, you ...(14)... eat an early breakfast in the sky ...(15)... kabul, and be in London by about 1.00pm. Solve 1

Noor, a young student, was trying to demonstrate some properties of light in her Science project work. She kept ‘X’ inside the box (as shown in the figure) and with the help of a laser pointer made light rays pass through the holes on one side of the box. She had a small butter-paper screen to see the spots of light being cast as they emerged. She measured the angles of incidence for both the rays on the left side of the box to be 48.6^(@) . She knew the refractive index of the material ‘X’ inside the box was 1.5. What will be the approximate value of angle of refraction? (use the value: sin 48.6^(@) ~~ 0.75 )