Questions

Q:

A tennis ball machine serves a ball vertically into the air from a height of 2 feet, with an initial speed of 110 feet per second. After how many seconds does the ball attain its maximum height?

A) 2.87 sec B) 3.44 sec
C) 4.65 sec D) 5.41 sec
 
Answer & Explanation Answer: B) 3.44 sec

Explanation:

It is launched vertically with an initial speed of 110 ft/sec.

It will reach maximum height when the speed drops to 0.

Vo=110 feet per second 

ho=2 feet 

So, h(t) = -16t^2 +110t +2 

Take the derivative: h'(t) = 110 -32t 

The maximum height will be at the inflection when the derivative crosses the x-axis, then h'(t)=0. 

So, set h'(t)=0 and solve for t: 

0 = 110 -32t 

-110 = -32t 

t=3.4375 

t=3.44 seconds.

 

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Filed Under: Physics
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3 6516
Q:

Cosmetic powders are prepared from

A) Talc B) Serpentine
C) Asbestos D) Gypsum
 
Answer & Explanation Answer: A) Talc

Explanation:

Cosmetic powders are prepared from Talc.

Face powder is a cosmetic powder applied to the face to set a foundation after application. It can also be reapplied throughout the day to minimize shininess caused by oily skin. There is translucent sheer powder, and there is pigmented powder.

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Filed Under: General Science
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11 6513
Q:

" World Press Freedom Day " is observed on ?

A) May 1 B) May 2
C) May 3 D) May 4
 
Answer & Explanation Answer: C) May 3

Explanation:

World Press Freedom Day is observed on 3 May every year.

This year’s theme is “Critical Minds for Critical Times: Media’s role in advancing peaceful, just and inclusive societies”.

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Filed Under: Important Days and Years
Exam Prep: Bank Exams , CAT

4 6511
Q:

Gujarat is noted for the cultivation of 

A) Cotton B) Sugarcane
C) Saffron D) Jute
 
Answer & Explanation Answer: A) Cotton

Explanation:

Black soil coupled with favorable climatic conditions (Temperature of 21-320C and 30 -100 cm of rainfall) are responsible for cotton cultivation in Gujarat.

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Filed Under: Indian Geography
Exam Prep: Bank Exams , CAT
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15 6511
Q:

A data dictionary is a special file that contains

A) The width of all fields in all files B) The data type of all fields in all file
C) The name of all fields in all files D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

A data dictionary is a special file that contains a set of information describing the contents, format, and structure of a database and the relationship between its elements, used to control access to and manipulation of the database.

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Filed Under: Database
Exam Prep: Bank Exams
Job Role: Analyst , Bank Clerk , Database Administration , IT Trainer

7 6511
Q:

The Pallava ruler who built the famous kailash temple at Kanchi and the Shore temple at Mahabalipuram was

A) Narsimha varman II B) Paramesvar varman I
C) Mahendra varman I D) Narasimha varman I
 
Answer & Explanation Answer: A) Narsimha varman II

Explanation:
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Filed Under: Indian History

4 6509
Q:

When a steel ball is placed on the surface of mercury, it does not sink because

A) of the surface tension of mercury B) mercury is a semisolid
C) of the high viscosity of mercury D) the density of mercury is greater than that of steel
 
Answer & Explanation Answer: D) the density of mercury is greater than that of steel

Explanation:

A solid sinks in a liquid if its density is greater than that of the liquid. if less, it floats

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Filed Under: Physics

8 6508
Q:

When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is

A) the violet ray B) the red ray
C) the green ray D) the blue ray
 
Answer & Explanation Answer: B) the red ray

Explanation:

Red is deviated the least and violet the most

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Filed Under: Physics

14 6508