The given diagram shows a box being pushed.
Identify the three forces, W, X and Y acting on the box.
A man standing 150 m away from a cliff fires a gun. A second man who is standing 300 m further away from first man hears the gun 1 second after he sees the flash. The second man will hear the echo from the cliff _______.
(A) 1 second after seeing the flash
(B) 2 seconds after hearing the gun
(C) 2 seconds after seeing the flash
(D) 4 seconds after hearing the gun
Which of the following statements is correct?
A Motion of soldiers on march past is a periodic motion.
B Motion of a train along a curved track on hills is the example of curvilinear motion.
C Every periodic motion is also a oscillatory motion.
D Hockey player running after a ball is a combined motion.
Motion of soldiers is periodic motion, not translatory motion.
T he given diagram shows two organs labelled as X and Y. Select a correct option about the difference between these two organs.
(A) Organ Y contains undigested food but organ X contains digested food.
(B) Digested food is absorbed in organ Y but water is absorbed in organ X.
(C) Organ X secretes intestinal juice but organ Y secretes bile juice.
(D) All of these
How is bacteria usually used in sewage treatment?
ABacteria is used to speed up digestion of waste into harmless soluble substances.
BBacteria is used to remove pathogens in sludge before the latter is released into water bodies.
CBacteria is used to help heavier waste to settle for removal in sedimentation tanks.
DBacteria is used to sterilise sludge to ensure safe discharge into rivers and lakes.
Two wires P and Q are carrying electric currents either into or out of the page. A, B and C are plotting
compasses placed in between P and Q as shown in
figure. Which of the following options about the direction
and amount of the current in P and Q is correct?
|A||Same||Larger in P than in Q|
|B||Same||Smaller in P than in Q|
|C||Different||Larger in P than in Q|
|D||Different||Smaller in P than in Q|
What is the expected result of the experiment shown in the diagram?
(A) The balloon will further inflate and fly off the mouth of the flask.
(B) The conical flask will crack.
(C) The balloon will be sucked into the conical flask.
(D) Nothing will happen.
Which of the following statements is/are correct?
I. Natural fibres burn to form a residue on heating.
II. Wool and silk burn with smell of burning hair.
III. Silk being a natural fibre absorbs less water than nylon.
IV. Natural fibres are moth resistant.
V. Synthetic fibres maintain a permanent crease and do not get crumpled.
AI and V only
BI, II and V only
CII, III and IV only
DII and V only