To compare the hearing capacities of 5 of his friends, Ravi designs a simple experiment. He places a CD player at the end of a long hall containing a CD with 5 well-known songs. One by one each person hears the same 5 songs he plays softly but at a pre-determined volume. Each person starts at a distance of 1 metre from the player and moves away from it. The distance at which a person says that he cannot hear the song any more, is noted. Others are not in the room when 1 person is hearing the songs. Which of these steps may increase the reliability of the results obtained?
Answers
Answer:
Subject: MATHS
What decimal fraction of the figure below is shaded?
A
0.45
B
0.045
C
0.09
D
0.18
08/12/20
Subject: MATHS
Scientific Notation is a concise way of writing any number in the form a x 10b where a is a number between 1 and 10 and b is an integer.
For example, 652 would be written as 6.52 x 102 in this notation.
Which of the following is most likely to contain a negative exponent of 10 when represented in scientific notation?
A
Number of cells in a honeycomb
B
Speed of light in kilometres per second
C
Diameter of a blood cell in centimetres
D
Mass of an airplane in kilograms
21/10/20
Subject: SCIENCE
20/10/20
Subject: MATHS
If two fair coins are tossed simultaneously, what are the chances of both coming up 'Heads'?
A
10%
B
25%
C
50%
D
75%
19/10/20
Subject: ENGLISH
Which of these headlines is in the Active Voice?
A
9 Die in Mulund Train Blast
B
Circus Animals Rescued by High Court Order
C
3 Held for Betting on Cricket Match
D
Varsity Professor Told to Leave as Probe begins
17/10/20
Subject: SOCIAL STUDIES
River Rafting is journeying on a torrential river on an inflatable rubber boat. Rivers originating at high altitudes have torrential flow near their source.
Which of the following places would be suitable for river rafting?
A
Sabarmati in Ahmedabad
B
Gomti in Lucknow
C
Ganga in Rishikesh
D
Hughli in Kolkata
16/10/20
Subject: SCIENCE
In which of these cases is there no ROTATIONAL MOTION?
A
operating a pulley
B
hitting a shuttlecock
C
riding a bicycle
D
using a beam balance
12/10/20
Subject: ENGLISH
Which is the correct way of rewriting the sentence below?
Most principals are perceived to be strict disciplinarians.
A
We perceived most principals to be strict disciplinarians.
B
We perceive most principals to be strict disciplinarians.
C
We had perceived most principals to be strict disciplinarians.
D
We have perceived most principals to be strict disciplinarians.
10/10/20
Subject: SOCIAL STUDIES
Which of the following modern Indian states has a river estuary?
A
Chhattisgarh
B
Bihar
C
Assam
D
Goa
09/10/20
Subject: SCIENCE
22/09/20
Subject: MATHS
In the weighing scales shown below, the same shapes represent the same weights.
According to the balanced scales P and Q, what weights should be put on the pan on the right to balance scale R?
A
B
C
D
21/09/20
Subject: ENGLISH
The police constable was attacked while on his watch.
In the above sentence, the underlined word is _____________.
A
a noun
B
a verb
C
an adjective
D
an adverb
19/09/20
Subject: SOCIAL STUDIES
For a jungle trek, which of the following items is it NOT advisable to carry?
A
Hat
B
Torch
C
Tape Recorder
D
Binoculars
18/09/20
Subject: SCIENCE
You read a newspaper report that a food product you consume regularly contains pesticides which can cause cancer in the long term. What would be the scientific thing to do at this stage?
A
Ignore the report - anyway the effects are very long term.
B
Stop consuming the product with immediate effect.
C
Obtain more details about the tests and try to understand them.
D
Discuss the issue widely with your friends and share your fears.
29/08/20
Subject: SOCIAL SCIENCE
Raghu wants to wear the ethnic wear shown here during a festival. Which of the following state emporiums should he visit to buy it?
A
Mrignayani (M. P. State Emporium)
B
Manjusha (West Bengal State Emporium)
C
Gurjari (Gujarat State Emporium)
D
Utkalika (Orissa State Emporium)