Three blocks A, B and C, of masses 4 kg, 2 kg and
1 kg respectively, are in contact on a frictionless surface,
as shown in the figure. If a force of 14 N is applied
on the 4 kg block, then the contact force between
A and B is
A 8 N
B 4 N
C 2 N
D 6 N
How to solvePls help
Mass spectrum of an element Q
having two isotopes Q1 and Q2
is shown in the given graph.
If Q2 is 8.082 times heavier than 12C and Q1 is 7.833 times heavier than 12C then, the molecular mass of compound, QO1 will be approximately
(Given : Atomic mass of O = 16 u)
A 94 u
B 128 u
C 96 u
D 125 u.
How to solve
Two point objects A and B having masses in the
ratio 4 : 3 are separated by a distance of 1 m. When
another point object C of mass M is placed in between
A and B, the force between A and C is (1/3)rd
of the force between B and C. Then, the distance of C from A is
How to solve
The given graph shows the effect of pH on the activity of four different enzymes (P, Q, R and S). Which of the following correctly identifies enzyme found in the stomach, small intestine and one not affected by pH?
The name of which of the following CANNOT be obtained by using the letters given in the box?
(You can use each letter more than once.)
A It is formed by condensation of atmospheric water vapour on cold exposed surfaces like leaves of plants.
B It is formed when atmospheric water vapour condenses and freezes on a surface which cools past dew point.
C It is a form of precipitation occurring in plains and leading to floods at times.
D It forms when thunderstorm updrafts are strong enough to carry water droplets above the freezing level causing them to freeze.