★ During a tug of war, force Y is applied by the team members to move the rope and force X is applied against the ground to move backward. What are forces X and Y?
Reeta puts two different objects in each of the following containers.
Container (i) : Copper coin and iron nail
Container (ii) : Steel nail and aluminium earring
Container (iii) : Marble and gold coin
Container (iv) : Nickel coin and steel nail
She can use a magnet to separate the objects in containers
A (i) and (ii)
B (i), (ii) and (iii)
C (i), (ii) and (iv)
D (i), (ii), (iii) and (iv).
Read the following passage carefully.
P helps to maintain strong eyesight and healthy skin. Q is required for normal growth of bones and teeth in children. R is essential for proper functioning of muscles and nerves. S is needed for natural clotting of blood.
Identify P, Q, R and S and select the incorrect statement regarding these.
A Q is produced when the skin is exposed to sunlight.
B R is a mineral, deficiency of which causes spasms, poor digestion, anxiety and sleeplessness.
C Cod liver oil is a good source of both P and S.
D S is synthesised in our body by bacteria present in the gut.
Refer the given passage and answer the following questions. The graph in the figure shows the position of a body at different times.
What is the speed of the body as it moves from C to D?
(a) 1 cm/s
(b) 4 cm/s
(c) 8 cm/s
(d) 2 cm/s
Riya found kitchenware which was resistant to fire and was able to tolerate heat better than other plastics, she wondered as to what could the material be. Can you guess the material ?
(d) None of these
The weight of a molecule of the compounds C60H22 is
(A) 1.4 × 10-21 g
(B) 1.09 × 10-21 g
(C) 5.025 × 1023 g
(D) 16.023 ×
how to solve
About ____________of Earth's surface is covered with water.
won't it be 3/4th ?