Seismograph is an instrument used to measure the intensity of earth quakes. Seismograph mainly consists of a :

Which law explains colours of stars based on temperature?

The three modes of heat transfer are:

Which of the following is correct about Specific heat capacity of water?

Efficiency of Carnot engine can be increased by:

The best conductor of heat among the following is

A graph of Fahrenheit temperature versus Celsius temperature is a straight line, whose intercept is _____.

A point mass has a velocity v = (1.0 m/s) i + (3.0 m/s) j, at a certain instant. At the same instant, it experiences a force F = - (2.0 N) i + (4.0 N) j + (5.0 N) k. i, j and k are unit vectors along x-, y-, and z- axis, respectively. The power delivered by the force, at that instant is:

The position(x)-time(t) graph of a ball is a straight line inclined at an angle of 30° to the x-axis. The ball is moving with:

Mohan (mass 60 kg) runs up a flight of stairs having a rise of 5 m in 6 s. The average power supplied by him during run up is (take $$g$$​ = 10 $$\text{m/s}^2$$​):