Questions

Q:

An object that has kinetic energy must be

A) At an elevated position B) Falling
C) At rest D) Moving
 
Answer & Explanation Answer: D) Moving

Explanation:

In physics, we know that the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

Hence, An object that has kinetic energy must be in motion i.e, moving.

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Q:

Which is the coldest of all the planets?

A) Jupiter B) Uranus
C) Neptune D) Pluto
 
Answer & Explanation Answer: C) Neptune

Explanation:

Neptune is the Coldest of all the planets

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33 10809
Q:

Which of the following is not a function of cytoskeleton in a cell ?

A) Maintenance of cell shape and structure B) Intracellular transport
C) Cell motility D) Support of the organelle
 
Answer & Explanation Answer: B) Intracellular transport

Explanation:

A cytoskeleton is the frame that gives shape to a cell. And also it offers support, and facilitates movement through three main components:

microfilaments,

intermediate filaments, and

microtubules.

 

The cytoskeleton helps the cell move in its environment and controls the movement of all of the cell's interior workings.

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10 10807
Q:

The modulus of elasticity for mild steel is approximately equal to

A) 210 kN/mm2 B) 100 kN/mm2
C) 80 kN/mm2 D) 10 kN/mm2
 
Answer & Explanation Answer: A) 210 kN/mm2

Explanation:

It is useful to have a property of a material that is independent of the size of the sample and can be use to compare its elastic properties with another - this is called the Modulus of Elasticity for the material.

The modulus of elasticity is defined as:

 

Modulus of elasticity = Stress / Strain

 

There are three types of moduli. They are :

(a) the Young Modulus - tensile and compression longitudinal stress

(b) the shear modulus - a shearing stress

(c) the bulk modulus - volume changes of the specimen.

 

mod-compressor1528180544.jpg image

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2 10806
Q:

In a laser (say neon laser) all the atoms emit the light waves of 

A) Same frequency B) Same amplitude
C) Same phase D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:
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Filed Under: General Science

25 10805
Q:

What color does blue and yellow make?

A) Green B) Black
C) Red D) White
 
Answer & Explanation Answer: A) Green

Explanation:

Mixing of blue and yellow colors make Green Color.

                                 400px-Color_mixture.svg_1521793884.png image

 

RYB (an abbreviation of red–yellow–blue) is a historical set of colors used in subtractive color mixing and is one commonly used set of primary colors. It is primarily used in art and design education, particularly painting.

RYB predates modern scientific color theory, which has determined that cyan, magenta, and yellow are the best set of three colorants to combine, for the widest range of high-chroma colors.

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Q:

Solve the following equations and find the value of abc?

 

A) 3 B) 6
C) 9 D) 12
 
Answer & Explanation Answer: B) 6

Explanation:

From the given equations,

(a+b+c)2=a2+b2+c2+2(ab+bc+ca)
(6)2=14 + 2(ab + bc + ca)
36 - 14 = 2(ab + bc + ca)
22/2 = ab + bc + ca
ab + bc + ca = 11

a3 + b3 + c3 - 3abc = (a + b + c)(a2 + b2 + c2 - ab - bc - ca)
= (6) (14 - 11)
=(6)(3)
=18

Since, a3 + b3 + c3 - 3abc = 18

36 - 3abc = 18

-3abc = 18 - 36

-3abc = -18

abc = 6.

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37 10798
Q:

Which action is safe for a pwc?

A) towing a skier behind a pwc rated for 3 people with two persons on board B) shutting off the engine before cleaning debris from the pump intake
C) seating a child to small to hold on the operator in front of the operator D) All the above
 
Answer & Explanation Answer: C) seating a child to small to hold on the operator in front of the operator

Explanation:

Two passengers behind the operator is safe for a PWC.

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