In electrodynamics, what term refers to the average speed of the charge carriers?
A spaceship moving away from Earth with speed of 0.900c fires a robot space probe in the same direction as its motion, with speed of 0.700c relative to the spaceship. What is the probe’s velocity relative to the Earth?
The characteristic of sound which enables us to distinguish two musical notes having the same frequency and loudness is called
What is the work done in a piston-cylinder system that contains 0.5 cu meter of air initially at 150 kPA and 50 degrees Celsius if the temperature remains constant while the volume is decreased to a quarter of the original volume?
Cohesion is the attraction between like
It states that, "If a stress is placed on a system on equilibrium whereby the equilibrium is altered, that change will take place which tends to relieve or neutralize the effect of the added stress".
Suppose that energy Q is required to accelerate a car from rest to v, neglecting friction. How much added energy would be required to increase the speed from v to 2v?
A 60-ohm electric lamp if left connected to a 240-volt line for 3.0 min. How much energy is taken from the line?
Which one of the following propagates with the same speed as speed of light?
Suppose you want to store 1.00 J of electric potential energy in a volume of 1.00 m3 in vacuum. What is the magnitude of the required electric field?
Which of the following is true? The density of water
The surface of the thermos flask is silvered for minimizing heat transfer by what process
The amount of heat needed to change solid to liquid is
The amount of heat which is absorbed during the change of state of a substance without rise in its temperature is called its
The phenomenon of damping results in decrease in
Which of the following thermometers is best suited for measuring a temperature of nearly 1500oC?
Which one of the following processes of heat transfer requires the presence of a fluid?
Heat will flow from one body to another in thermal contact with it, when they differ in
In optics, this effect refers to the blurring of the image produced on a concave mirror due to the convergence of rays far from the mirror to other points on the principal axis. What do you call this effect?
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