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Statements: Some cameras are calculators Some calculators are diaries All notebook are diaries All diaries are computers. Conclusions: I. Some notebooks are calculators II. Some calculators are computers III. All notebooks are computers IV. Some diaries are cameras

Name two economically importatnt spongs. Give their classification . Write a short note on any one of these.

The minute hand of a clock is 21 cm long. Calculate the distance travelled by its tip in 24 minutes.

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Statements: Some shoes are hanker chiefs. Some hankerchiefs are calculators. All calculators are paper. Conclusions: No calculator is a shoe II. No shoe is a paper.

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A drawing pin with a tip area of 0.1 mm ""^(2) is pushed against a board with a force of 30 N. Calculate the pressure exerted at the tip.

The minute hand of a clock is 21 cm long. Calculate the area swept by it and the distance travelled by tip in 20 minutes.

Potential at the tip of a pointed conductor is