The intermolecular interaction that is dependent on the inverse cube of distance between the molecule is :
Diameter of plano-convex lens is 6 cm and thickness at the centre is 3 mm. If speed of light in material of lens is 2×108m/s, the focal length of the lens is :
The period of oscillation of a simple pendulum is T=2πgL. Measured value of L is 20.0 cm known to 1 mm accuracy and time for 100 oscillations of the pendulum is found to be 90 s using wrist watch of 1 s resolution. The accuracy in the determination of g is :
A pendulum made of a uniform wire of cross sectional are A has time period T. When an additional mass M is added to its bob, the time period changes to TM. If the Young's modulus of the material of the wire is Y then Y1 is equal to : (g = gravitational acceleration)
Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy ?
What is the minimum energy required to launch a satellite of mass m from the surface of a planet of mass M and radius R in a circular orbit at an altitude of 2R?