PART - 2 CH - 13 Oscillations — Physics STD 11 Science — Question

Which of the following methods can be used to measure the speed of light in water?

1. Roemer method.
2. Fizeau method.
3. Focault method.
4. Michelson method.

Given a + b + c + d = 0, which of the following statements are correct:

b + c must lie in the plane of a and d if a and d are not collinear, and in the line of a and d, if they are collinear?

The heat developed in a system is proportional to the current through it:

1. It cannot be Thomson heat.
2. It cannot be Peltier heat.
3. It cannot be Joule heat.
4. It can be any of the three heats mentioned above.

What effect will doubling the volume of gas have on the value of the root mean square velocity of its molecules at a fixed temperature?

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

The masses of two bodies are doubled and the distance is halved, how will the gravitational force change?

If all the terms in an equation have same units, is it necessary that they have same dimensions? If all the terms in an equation have same dimensions, is it necessary that they have same units?

Answer the following:
An artificial satellite orbiting the earth in very thin atmosphere loses its energy gradually due to dissipation against atmospheric resistance, however small. Why then does its speed increase progressively as it comes closer and closer to the earth?

Should the speed of two artificial satellites of the earth having different masses but the same orbital radius, be the same?

If the velocity of a particle is fixed, can its speed change?