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C. If the refractive index of glass with respect to air is 3/2, what is the refractive index of air with respect to glass? (i). 1/2 (ii). 3 (iii). 1/3 (iv). 2/3

asked Sep 27, 2021 in Chapter 6: Refraction of light by Doubtly (98.9k points)

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A storm broke a tree and the treetop rested 20 m from the base of the tree, making an angle of 60° with the horizontal. Find the height of the tree.

asked Oct 1, 2021 in Trigonometry by Doubtly (98.9k points)

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A person is standing at a distance of 80m from a church looking at its top. The angle of elevation is of 45°. Find the height of the church

asked Oct 1, 2021 in Trigonometry by Doubtly (98.9k points)

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Name the following diagrams and explain the concept behind them.

asked Sep 27, 2021 in Chapter 4: Effects of electric current by Doubtly (98.9k points)

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If tan θ = 1, then find the value of sinθ+ cosθ /secθ+cosecθ

asked Sep 30, 2021 in Trigonometry by Doubtly (98.9k points)

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c. Explain the role of latent heat in the change of state of a substances?

asked Sep 27, 2021 in Chapter 5: Heat by Doubtly (98.9k points)

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While deciding the unit for heat, which temperatures interval is chosen? Why?

asked Sep 27, 2021 in Chapter 5: Heat by Doubtly (98.9k points)

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Video Lecture on Kepler's law

asked Sep 27, 2021 in Lecture by Doubtly (98.9k points)

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Which of the following is a crystalline solid? (A) Glass (B) Rubber (C) Plastic (D) Sugar

asked Jun 19, 2021 in chemistry by Doubtly (98.9k points)

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Settlements are sparse in north-eastern Brazil.

asked Sep 24, 2021 in Chapter 7: Human Settlements by Doubtly (98.9k points)

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For electric power transmission, copper or aluminium wire is used.

asked Sep 26, 2021 in Chapter 4: Effects of electric current by Doubtly (98.9k points)

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(2) Prepare a questionnaire for a field visit to a factory.

asked May 2, 2021 in Chapter 1: Field Visit by Doubtly (98.9k points)

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Fill in the blanks and Explain the completed sentences. (i) . Refractive index depends on the ............. of light.

asked Sep 27, 2021 in Chapter 6: Refraction of light by Doubtly (98.9k points)

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Prove That: Sec 4 a ( 1 − Sin 4 a ) − 2 Tan 2 a = 1

asked Sep 30, 2021 in Trigonometry by Doubtly (98.9k points)

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In practice the unit kWh is used for the measurement of electrical energy, rather than joule.

asked Sep 26, 2021 in Chapter 4: Effects of electric current by Doubtly (98.9k points)

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Prove That: Tan a ( 1 + Tan 2 a ) 2 + Cot a ( 1 + Cot 2 a ) 2 = Sin a Cos a

asked Sep 30, 2021 in Trigonometry by Doubtly (98.9k points)

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Two poles of heights 18 metre and 7 metre are erected on a ground. The length of the wire fastened at their tops in 22 metre

asked Oct 1, 2021 in Trigonometry by Doubtly (98.9k points)

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proove that tan theta\sec theta - 1= tan theta + sec theta + 1/ tan theta + sec theta - 1}

asked Sep 30, 2021 in Trigonometry by Doubtly (98.9k points)

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Q1. Tick (✓) the correct options: Chapter 7 Human Settlements Textbook Class 10 Geography Maharashtra State Board

asked Sep 24, 2021 in Chapter 7: Human Settlements by Doubtly (98.9k points)

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1 answer 1.4k views

[Science 2]SSC Science Question Paper 2020 - Part 2 - March - English Medium - Std 10th Maharashtra Board

asked Jun 5, 2021 in Maharashtra board 10th by Doubtly (98.9k points)

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