User Forum

The distance-time graph of the motion of a toy car is shown in the figure. Which of the following statements is false for the toy car?


ACar is moving fastest during the time interval 5 s to 10 s
BAverage speed of the car is 0.8 m/s
CCar is moving with three different speeds during whole journey
DSpeed of the car at 8 s is 0.8 m/s

Find the missing number.
8 27 84 255 __?__ 2307

A712
B765
C768
D718

Why two astronauts cannot talk to each other in space?

ASound cannot be heard due to Moon's gravitational force.
BSound reflects back.
CSound travels only in straight line.
DSound cannot travel through vacuum.

Refer to given set-up and answer the following questions.
X : What will be the shape of the shadow obtained?
Y : How can we get a triangular shadow?


A
B
C
DNone of these

Length of a cotton thread is measured between two points on a ruler. When the length of cotton thread is wound closely around a pencil, it goes round six times. What is the length of the cotton thread needed to once round the pencil?


A1.45 cm
B1.75 cm
C2.17 cm
D2.03 cm

Read the given paragraph. Our food consists of carbohydrates, proteins, fats, vitamins and P. Carbohydrates contain carbon, hydrogen and Q. Proteins if deficient in diet can lead to R in children below 1 year of age. Deficiency of vitamin A can lead to S. Select the incorrect statement regarding P, Q, R and S.

AP can either be minerals or roughage.
BQ is oxygen.
CS can be nightblindness.
DR is pellagra.

Select the incorrect match.


A(i) and (ii) only
B(ii) and (iii) only
C(iii) only
D(i), (ii) and (iii)