Gravitation — Physics STD 11 Science — Question

Why can a Carnot's engine not get 100% efficiency?

A metallic metre stick moves with a velocity of 2m/s^-1 in a direction perpendicular to its length and perpendicular to a uniform magnetic field of magnitude 0.2 T. Find the emf induced between the ends of the stick.

Three vessels have same base area and different neck area. Equal volume of liquid is poured into them, which will possess more pressure at the base?

Is it possible to heat a body without providing heat energy? How?

When the maximum height obtained by a prejection is the largest, then name the two quantities which will be the largest?

Why does a piece of red glass when heated and taken out glow with green light?

What determines the natural frequency of a body?

What does the slope of the graph drawn between stress and strain show?

State the theorem of functions.

Is it practically possible to have situation where (E - U) < 0?