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aritro bhaumik from lotus valley, Noida
Subject :NSO    Class : Class 7

Which of the following statements are correct?
(i) Time period of a simple pendulum is the time taken by the pendulum to complete one oscillation.
(ii) The area under the speed-time graph on time axis is the distance.
(iii) Heat is exchanged between two bodies if they have different amount of heat but have same temperature.
(iv) In an electrical circuit, short circuit occurs when a naked live wire and a neutral wire come in direct contact.
(v) When a light wave and a sound wave travel from air into water, their speeds are decreased.
a. (i), (ii) and (iv) only
b. (i), (ii) and (iii) only
c. (ii), (iii) and (iv) only
d. (iii), (iv) and (v) only
Given that average speed of the car is 60 km h–1.
What is the value of x?

A 120 km
B 180 km
C 240 km
D 720 km


the questions wrong, two questions are colliding

Ans 1:

Rishi from Deens Academy, BENGALURU
Class : Class 7
exactly!!!its bugged

Ans 2:

Advik Tripathi from The Khaitan School, Noida
Class : Class 7
I tried doing it, nothing came out! Hell!!

Ans 3:

Hritvi from Podar International School, Mumbai
Class : Class 7
There are 2 parts in this question which are not at all inter-related.The average speed (2nd part) question is the incomplete question of Q.10

Ans 4:

Palash sachin patel from Kips, Patan
Class : Class 8
correct options are not given

Ans 5:

Prathamesh Raje from DPS Electronic City, Bangalore
Class : Class 9
NA

Ans 6:

GAUTHAM GOPINATH from BPDAV School, HYDERABAD
Class : Class 10
How is the first part of the question related to the second part?

Ans 7:

Bhavtosh Tripathi from Maneckji Cooper Education Trust School, Mumbai
Class : Class 9
The question has a bug

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