A wooden block is floating in water contained in a beaker. If the beaker is placed in a free falling elevator, during the free fall, the upthrust on the block will be
A Equal to the weight of the block
B Slightly more than the weight of the block
C Slightly less than the weight of the block
Why it is zero
Tides are caused by _______.
A Gravitational pull of Earth
B Movement of large ships
C Gravitational pull of Moon
D None of these
We eat roots of many plants. Select the option that correctly identifies foods [(i)-(iv)] sourced from roots.
A(i), (ii) and (iv)
B(i), (ii) and (iii)
C(iii) and (iv)
D(i), (ii), (iii) and (iv)
This is a wrong answer . The ginger is a modified stem
A wire of resistance 5 Ω is bent into a circular loop
and the resistance between its diametrically opposite
points is measured to be R. Now, it is stretched so that
its length is increased by twice its original. Again, it
is bent into a bigger circular loop and the resistance
between its diametrically opposite points is measured
to be R'. Then R : R' will be
A 1 : 4
B 9 : 1
C 1 : 9
D 1 : 1
Refer to the given figure of human digestive system and select the option which correctly answers (i), (ii) and (iii).
(i) The inner lining of which of the labelled parts secretes mucus and hydrochloric acid?
(ii) Juice secreted from which of the labelled parts breaks down fats completely into fatty acids and glycerol?
(iii) The food that remains undigested and unabsorbed passes into which of the labelled parts?
A (i) - P, (ii) - Q, (iii) - S
B (i) - P, (ii) - R, (iii) - S
C (i) - R, (ii) - P, (iii) - Q
D (i) - Q, (ii) - R, (iii) - P
what is the answer