NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1402 - 1406 of 2000

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Question number: 1402

» Chemistry » Atoms & Molecules

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MCQ▾

Question

How much volume does moles of contain?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1403

» Physics » Force & Laws of Motion

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Question

A stone of mass is thrown with a velocity of across the frozen surface of a lake and comes to rest after travelling a distance of . What is the force of friction between the stone and the ice?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1404

» Physics » Gravitation & Pressure

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Question

If the radius of the earth shrinks by and there is no change in its mass, the value of acceleration due to gravity will change by:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1405

» Physics » Work, Energy & Power

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Question

Calculate the work done in raising a stone of mass and specific gravity lying at the bed of a lake through a height of .

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1406

» Physics » Work, Energy & Power

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MCQ▾

Question

In which of the following cases, is the work done minimum?

Choices

Choice (4) Response

a.

Angle α Angle α: Angle between B, A, C Vector u Vector u: Vector [A, B] Vector u Vector u: Vector [A, B] Vector v Vector v: Vector [A, C] Vector v Vector v: Vector [A, C] vec F text1 = “vec F” vec F text1 = “vec F” vec s text1_1 = “vec s” vec s text1_1 = “vec s” 30degree text2 = “30degree” 30degree text2 = “30degree” 30degree text2 = “30degree”

Vectors of F and S (Choice A)

In figure vectors of F and S are shown.

b.

Angle α Angle α: Angle between B, A, C Vector u Vector u: Vector [A, B] Vector u Vector u: Vector [A, B] Vector v Vector v: Vector [A, C] Vector v Vector v: Vector [A, C] vec F text1 = “vec F” vec F text1 = “vec F” vec s text1_1 = “vec s” vec s text1_1 = “vec s” 90degree text2 = “90degree” 90degree text2 = “90degree” 90degree text2 = “90degree”

Vectors of F and S (Choice B)

In figure vectors of F and S are shown.

c.

Angle α Angle α: Angle between B, A, C Vector u Vector u: Vector [A, B] Vector u Vector u: Vector [A, B] Vector v Vector v: Vector [A, C] Vector v Vector v: Vector [A, C] vec F text1 = “vec F” vec F text1 = “vec F” vec s text1_1 = “vec s” vec s text1_1 = “vec s” 5degree text2 = “5degree” 5degree text2 = “5degree”

Vectors of F and S (Choice C)

In figure vectors of F and S are shown.

d.

Vector u Vector u: Vector [A, B] Vector u Vector u: Vector [A, B] Vector u_1 Vector u_1: Vector [A_1, B_1] Vector u_1 Vector u_1: Vector [A_1, B_1] vec F text1 = “vec F” vec F text1 = “vec F” vec s text1_1 = “vec s” vec s text1_1 = “vec s”

Vectors of F and S (Choice D)

In figure vectors of F and S are shown.

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