Thermodynamics — Physics STD 12 Science — Question

State Kirchhoff’s first (current) law.

Why a detergent powder is mixed with water to wash clothes?

What is a second pendulum?

What happens when a ballet dancer stretches her arms while taking turns?

If you look at the sky in a particular direction through a polaroid and rotate the polaroid around that direction what will you see ?

Which method of biasing is used for operating transistor as an amplifier?

What is the angular momentum of an electron in the first excited state for a hydrogen atom?

Are good absorbers also good emitters ?

The relative velocity between two parallel layers of water is 8 cm/s and the perpendicular distance between them is 0.1 cm. Calculate the velocity gradient.

State the name of the visible series in hydrogen spectrum.