Q:

What type of lens is a magnifying glass?

A) Diverging	B) Spherical
C) Converging	D) Achromatic

Answer & Explanation Answer: C) Converging

Explanation:

A magnifying glass is a convex lens that is used to produce a magnified image of an object. It is also called a hand lens in laboratory contexts.

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5 3594

Q:

The Black Box is a device used in an aircraft to

A) control the speed	B) detect any flaw in the engines
C) Record the flight data	D) maintain contact with the ground

Answer & Explanation Answer: C) Record the flight data

Explanation:

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0 3593

Q:

The first President of USA was

Answer

George Washington

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Subject: World History

2 3593

Q:

Visible light has a higher frequency than

A) Radio waves	B) X rays
C) Ultra violet	D) All the above

Answer & Explanation Answer: A) Radio waves

Explanation:

Radio waves have much longer wavelengths and lower frequencies than do visible light waves. In contrast, X-rays have much shorter wavelengths and higher frequencies.

Ultraviolet Light (UV). part of the electromagnetic spectrum that consists of waves with frequencies higher than those of visible light and lower than those of x-rays.

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2 3592

Q:

Climate of a place is dependent on several factors. Which of the followin is the most significant?

A) Distance from sea	B) Direction of winds
C) Latitude	D) Ocean curents

Answer & Explanation Answer: C) Latitude

Explanation:

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0 3591

Q:

What is the minimum velocity required for a rocket to overcome earth's gravity and travel into space?

A) 18 km/sec	B) 11.2 km/sec
C) 21 km/sec	D) 35 km/sec

Answer & Explanation Answer: B) 11.2 km/sec

Explanation:

This 11.2 km/s is also known as the escape velocity. It works out to roughly 25000miles per hour

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3 3589

Q:

Pravasi Bharatiya Diwas is observed on which of the following days?

A) 9th January	B) 19th January
C) 9th February	D) 19th February

Answer & Explanation Answer: A) 9th January

Explanation:

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Q:

In electro - magnetic radiation, which of the following has greater wave - length than visible light

A) Ultra -violet rays	B) Infra - red rays
C) Cosmic rays	D) x-rays

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