Waves — Physics STD 11 Science — Question

A car travels at a speed of 60km/hr due north and the other at a speed of 60km/hr due east. Are the velocities equal? If no, which one is greater? If you find any of the questions irrelevant, explain.

Why does the time period of a swing not change when two persons sit on it instead of one?

Chlorine and carbon dioxide gases are maintained at 27°C. Which gas will have higher average molar kinetic energy of translation and why?

Action and reaction are equal and opposite. Why do they not balance each other?

When force acting on a body is perpendicular to direction of motion then work done is ­­­­­­­­­________.

Work done by weight of a body moving horizontally is ­________.

Give the magnitude and direction of the net force acting on. A drop of rain falling down with a constant speed.

What will the effect on time period if a hollow sphere of the same size is used instead of a solid iron sphere in a simple pendulum.

A stone breaks the window glass into pieces, while a bullet pierces through the same. Why?

Can we define specific heat capacity at constant temperature?