Physics Test 13...

Work done by the system in closed path ABCA, as shown in figure is

A body executes S.H.M. of period 20 seconds. Its velocity is 5 cm s^-1, 2 seconds after it has passed the mean position. Find amplitude of the bob

Calculate the gas constant for 1g of a gas from the following data: c_p = 0.245calg^-1oC^-1;c_v = 0.165calg^-1°C^-1

A balloon is moving upwards with a speed of 20 m/s. When it is at a height of 14 m from ground in front of a plane mirror in as shown in figure, a boy drops himself from the balloon. Find the time duration for which he will see the image of source S placed symmetrically before plane mirror during free fall.

Prism angle & refractive index for a prism are 60^o & 1.414. Angle of minimum deviation will be

If a gas is heated at constant pressure then what percentage of total heat supplied is used for doing work ? (Given : γ for gas = 4/3)

Four persons K, L, M, N are initially at the four corners of a square of side d. Each person now moves with a uniform speed  v in such a way that K always moves directly towards L, L directly towards M, M directly towards N, and N directly towards K. The four persons will meet at a time .....

Estimate the speed of sound in air at standard temperature and pressure. The mass of 1 mole of air is 29.0 × 10^-3 kg

A pendulum bob is suspended on a flat car that moves with velocity v₀. The flat car is stopped by a bumper

(i) What is the angle through which the pendulum swings.

(ii) If the swing angle is θ = 60° and l = 10m, what was the initial speed of the flat car?

Two slits, 4 mm apart, are illuminated by light of wavelength 6000Å. What will be the fringe width on a screen placed 2 m from the slits?