PART - 1 CH - 1 Units and Measurements — Physics STD 11 Science — Question

A wave pulse passing on a string with a speed of 40cm/s in the negative x-direction has its maximum at x = 0 at t = 0. Where will this maximum be located at t = 5s?

Oxygen and hydrogen are at the same temperature T. What is the ratio of kinetic energies of oxygen molecule and hydrogen molecule when oxygen is 16 times heavier than hydrogen?

What is the specific enthalpy of a gas during the adiabatic process?

The work done by centripetal force on a satellite revolving around the Earth is zero. Write the reason.

Although the r.m.s. speed of gas molecules is of the order of the speed of sound in that gas, yet on opening a bottle of ammonia in one corner of a room, its smell takes time in reaching the other corner. Explain why?

A monkey climbs up a slippery pole for 3 seconds and subsequently slips for 3 seconds. Its velocity at time t is given by v(t) = 2t(3 - t); 0 < t < 3 and v(t) = -(t - 3)(6 - t) for 3 < t < 6s in m/s. It repeats this cycle till it reaches the height of 20m.
At what time is its acceleration maximum in magnitude?

Does the displacement of an object depend on the choice of the position of origin of the coordinate system?

Two particles A and B are moving along the same straight line. Bis ahead of A. Velocities remaining unchanged, what would be effect on the magnitude of relative velocity if A ahead of B?

The maximum acceleration is a and the maximum velocity is v. What is the amplitude?

How would the period of spring mess system change when it is med€ to oscillatc horizontally and then vertically?