In electromagnetics and wave theory, what refers to waves, commonly generated by electronic devices, whose wavelengths ranges from approximately 0.3m to 10-4 m. Due to their short wavelengths these are often used in radar systems and for studying the atomic and molecular properties of matter
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?
A mass of 8 kg is above a given datum, where local g is 9.70 m/s^2. Calculate the gravitational force with respect to the datum?
On decreasing the pressure, the boiling point of water will
In fluid mechanics, this shows that the pressure of a fluid decreases as the speed of the fluid increases. In addition, the pressure of a fluid decreases as the elevation increases
Who determined the quantitative relationship between the amount of electricity used in electrolysis and the amount of chemical reaction that occurs?
When a substance is heated, its
The energy stored in a starched elastic material such as spring is
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
The surface of the thermos flask is silvered for minimizing heat transfer by what process
When the temperature of an ideal gas is increased at constant pressure,
In electrodynamics, what term refers to the average speed of the charge carriers?
The phenomenon of damping results in decrease in
According to this law, “The force between two charges varies directly as the magnitude of each charge and inversely as the square of the distance between them
The work done by all forces except the gravitational force is always equal to the one of the system
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 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