A pupil uses a ticker-timer to investigate the movement of a trolley.
Every second, the ticker-timer puts 60 dots on the piece of tape. What length of time corresponds to the distance between X and Y on the tape?
(A) 0.10 s
(B) 0.11 s
(C) 0.17 s
(D) 0.18 s
Refer to the given word grid and answer the following questions.
The means of communication______ is hidden in this grid.
A Which is a two way audio means
B Which uses digital transmission to send written texts
C Which is a two way audio-visual means
D All of these
VIDEO CALL is not a two way audio-visual means
Monty fully filled a glass bottle with water, put a stopper on it and placed it upright in the freezer overnight. When he looked at it in the morning, the stopper was out of the bottle and a column of ice had emerged through the opening of the bottle.
Which one of the following is the best explanation for what Monty had observed?
A The bottle had contracted when it was put in the freezer and the water could no longer fit into it.
B Extra water condensed from the air in the freezer and then froze to form the column of ice.
C The bottle and stopper had contracted, allowing the water to pour out and form the ice column.
D The volume of water had increased when the water froze, forcing the stopper out of the bottle and forming the column of ice.
Refer the given figure of the solar system.
1. 'a' is the closest planet to the Earth.
2. 'c' is the smallest planet and is covered by red dust.
3. 'b' is the blue planet and is only planet to have life.
4. 'd' is the largest planet and does not have any Moon.
Which of the above statements is/are correct?
B2, 3 and 4
C1 and 3
D1, 3 and 4