Questions

Q:

Sum of factors of 4b2c2-(b2+c2-a2)2 is 

A) a + b + c B) 2(a + b + c)
C) 0 D) 1
 
Answer & Explanation Answer: B) 2(a + b + c)

Explanation:
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Q:

A voltaic cell converts chemical energy to

A) Heat energy B) Electrical energy
C) Mechanical energy D) Light energy
 
Answer & Explanation Answer: B) Electrical energy

Explanation:

A galvanic cell is also known as voltaic cell provides electrical energy from the chemical energy.

 

a_voltaic_cell_converts_chemical_energy_to1558088421.png image

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Filed Under: Physics
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Q:

Magnetic domains normally occur in

A) copper B) silver
C) iron D) All of the above
 
Answer & Explanation Answer: C) iron

Explanation:

A magnetic domain is a region within a magnetic material in which the magnetization is in a uniform direction. This means that the individual magnetic moments of the atoms are aligned with one another and they point in the same direction.

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Filed Under: Physics
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Q:

Echolocation is an adaptation bats use to

A) locate flowering plants B) hunt insects in flight
C) find warm places for hibernation D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Echolocation is an adaptation bats use to hunt insects in flight, locate flowering plants and find warm places for hibernation.

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Q:

The greenhouse effect is caused by

A) Deforestation B) Burning of Fossil Fuels
C) Increase in Population D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

The major greenhouse gases (GHG’s) solely responsible for greenhouse effect are Carbon dioxide, Ozone, Methane and Water vapor. Although these gases comprise 1% of our atmosphere, they act like a thick warm blanket outside that surrounds this planet and regulate climate control. Greenhouse effect is not bad. In fact, it is needed for all of us to survive on planet Earth. In short, the greenhouse effect is nothing but a naturally occurring process designed by nature that aids in heating earth’s surface and helps to maintain ecological balance.

Now, while some of that heat dissipates into space, some of it burns along the atmosphere, and some of it penetrates the atmosphere and finds its way into the lower atmosphere and the planet’s surface. This in turn raises the average temperature of the Earth. Therefore, the increase in the Earth’s surface temperature due to increase in the number of greenhouse gases leads to global warming.

 

Causes of Green House Effects ::

 

* Burning of Fossil Fuels

* Deforestation 

* Increase in Population

* Farming

* Industrial Waste and Landfills.

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Filed Under: General Awareness
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Q:

Who among the following has directed the film 'Sardar'

A) Tapan Sinha B) Shyam Benegal
C) Ketan Mehta D) Buddhadeb Das Gupta
 
Answer & Explanation Answer: C) Ketan Mehta

Explanation:
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Filed Under: Books and Authors

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Q:

Where can an advertiser change the location targeting of an ad?

Answer

Location targeting is set at the campaign level.

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Q:

What is the purpose of balancing chemical equations?

A) law of conservation of energy B) law of conservation of mass
C) Both A & B D) None of the above
 
Answer & Explanation Answer: B) law of conservation of mass

Explanation:

The main purpose of balancing chemical equations is to make the mass of reactants is equal to mass of products obtained after the reaction. Hence, to make law of conservation of mass is purpose of balancing chemica equations.

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Filed Under: Chemistry
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