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Which of the following statements are correct?
(i) Wheels of a car moving at a constant speed undergo linear, rotational as well as periodic motion.
(ii) A hockey player running after the ball during a match undergoes linear and periodic motion.
(iii) The pendulum of a clock undergoes periodic and oscillatory motion.

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

The given picture shows 7 dice. Find the total number of dots that are seen in this picture.



A21
B43
C104
D147

Read the given statements and select the correct option.
Statement 1 : Roughage do not give us any nutrients but it prevents constipation.
Statement 2 : Roughage adds bulk to the faeces and keeps it soft, to ensure the smooth movement of waste down the intestine and colon.

ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DBoth statements 1 and 2 are false.

Nitika, a class 8 student performed a few experiments to study the reactivity of metals. She summarised her observations in the given table.

Identify W, X, Y and Z.

Ashish was performing an experiment by setting up an arrangement as shown in the figure.

Which of the following relations holds correct regarding the amount of water that got collected in beakers 1, 2 and 3 after an hour?

A Beaker 1 > Beaker 2 > Beaker 3
B Beaker 1 > Beaker 3 > Beaker 2
C Beaker 3 > Beaker 1 > Beaker 2
D Beaker 3 > Beaker 2 > Beaker 1

Select a figure from the options, which fits exactly into given Fig. (X) to make a complete square.


A
B
C
D

In which of the following figures, Fig. (X) is exactly embedded as one of its part?


A
B
C
D

If young Crescent Moon is observed on the night of 3^rd December 20XX, then what is expected to appear on the night of 18^th December?

A Old Crescent Moon
B Young Gibbous
C Old Gibbous
D Full Moon

Earthquakes generate sound waves inside the earth. Unlike a gas, the earth can experience both transverse S and longitudinal P sound waves. Typically the speed of S wave is about 4.0 km s^-1, and that of P wave is 8.0 km s^-1. A seismograph records P and S waves from an earthquake. The first P wave arrives 4 minutes before the first S wave. Assuming the waves travel in straight line, at what distance does the earthquake occur?

A 960 km
B 640 km
C 1920 km
D 2880 km

Read the given statements and mark the correct option.
Statement 1 : Bohr's orbits are called stationary orbits.
Statement 2 : Electrons remain stationary in these orbits for some time.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false.