Motion in a Straight Line — Physics STD 11 Science — Question

Degree of freedom of a non linear triatomic gas molecule is               .

The resultant vector of three non-coplanar vector can't be ................ .

The highest capacity for_________ found in diffusion.

Releasing the arrow after placing the string on the ____________bow is called.

The vector sum of all mass moment around the centre of mass is............. .

Fill in the blanks:
Watt second is the unit of _______.

A particle executes simple harmonic motion with a frequency f. The frequency with which its kinetic energy oscillates is               .

Two sound waves having a phase difference of 60° have path difference of _______.

Any motion that repeats itself over and over again at regular interval of time is called              .

Spherical balls of radius R are falling in a viscous fluid of viscosity n with a velocity v. The retarding viscous force acting on the spherical ball is:

1. Directly proportional to radius R but inversely proportional to velocity.
2. Directly proportional to both radius R and velocity v.
3. Inversely proportional to both radius R and velocity v.
4. Inversely proportional to R but directly proportional to v.