Searching for "rotation"

Q:

The order of rotational symmetry of a parallelogram is

A) 1 B) 4
C) 2 D) 0
 
Answer & Explanation Answer: C) 2

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Filed Under: Area
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Q:

The order of rotational symmetry of a trapezium is

A) 2 B) 0
C) 1 D) 3
 
Answer & Explanation Answer: C) 1

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Q:

The order of rotational symmetry of a rectangle is

A) 1 B) 4
C) 2 D) 0
 
Answer & Explanation Answer: C) 2

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Q:

Crop rotation helps to

 

A) eliminate parasites which have selective hosts B) lessen use of pesticides
C) produce a greater choice of plant products D) yield more crops
 
Answer & Explanation Answer: A) eliminate parasites which have selective hosts

Explanation:

Crop rotation is the technique of planting crops in a different area of the garden so that no single crop will be planted in the same place two—or more—years in a row.

 

Crop rotation helps to maintain soil structure and nutrient levels and to prevent soilborne pests from getting a foothold in the garden.

 

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Q:

The instrument used to determine the rotation speed of a shaft is called

A) Speedometer B) Tachometer
C) Anemometer D) Chronometer
 
Answer & Explanation Answer: B) Tachometer

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Q:

______ is the perpendicular distance between point of application of force and axis of rotation.

A) Moment arm B) Moment of Inertia
C) Altitude D) Base
 
Answer & Explanation Answer: A) Moment arm

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Q:

Who developed the idea of Crop rotation?

A) Lily Thomas B) Carrot Cornwick
C) Cabbage Carlson D) Turnip Townsend
 
Answer & Explanation Answer: D) Turnip Townsend

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Q:

If speed of rotation of the earth increases, the weight of the body

A) decreases B)
C) D)
 
Answer & Explanation Answer: A) decreases

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Filed Under: Physics
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