Physics Test 10...

A gaseous mixture consists of 16 g of helium and 16 g of oxygen. The ratio C_p/C_v of the mixture is :

The first operation involved in carnot cycle is :-

If ΔU and ΔW represent the increase in internal energy and work done by the system respectively in a thermodynamic process, which of the following is true ?

A bullet of mass 0.1 kg is fired with a speed of 100 m/sec, the mass of gun is 50 kg. The velocity of recoil is :-

A disc of mass M and radius R is rolling without slipping with angular speed ω on a horizontal plane as shown. The magnitude of angular momentum of the disc about the origin O is :-

The speed of a boat is 5 km/hr in still water. If it crosses a river of width 1 km along the shortest possible path in 15 min., then velocity of the river is-

The co-ordinates of a moving particle at a time t, are given by, x = 5 sin 10t, y = 5 cos 10t. The speed of the particle is :-

Find T₁ & T₂ in the figure shown ?

A 40 kg slab rests on a frictionless floor. A 10 kg block rests on top of the slab. The static coefficient of friction between the block and the slab is 0.60 while the kinetic coefficient of friction is 0.40. The 10 kg block is acted upon by a horizontal force of 100 N. The resulting acceleration of the slab will be :-

A particle is projected at time t = 0 from a point P on the ground with a speed V₀, at an angle of 45° to the horizontal. What is the magnitude of the angular momentum of the particle about P at time t= v₀/g.