Question 1
20 % of 700 m is (a) 560 m (b) 70 m (c) 210 m (d) 140 m
We have, 20 % of 700 m =20100×700=20×7=140m Hence, 20 % of 700 m is 140 .
An air bubble rises from the bottom of a deep lake the radius of the air bubble near the surface is 'r'. Choose the appropriate radius of the air bubble.
a) r/2 at depth 30m
b) r/2 at depth 70m
c) r/3 at depth 140m
d) r/3 at depth 260m
The de Broglie wavelength of a bullet (mass=7.5g) traveling at 700 m/s is
Question 40
In the given figure, PQ ||ST. Then the value of x + y is (a) 125∘ (b) 135∘ (c) 145∘ (d) 120∘