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A person’s mass is 75.2 kg. If the person walks up a flight of stairs 12.6 m high in 28 s at constant velocity, what is the power output?
“At any point along a streamline in an ideal fluid in steady flow, the sum of the pressure, the potential energy per unit volume and the kinetic energy per unit volume have the same value.” The concept is known as
Heat will flow from one body to another in thermal contact with it, when they differ in
A 1-hp motor is rated at 1kW. What is its efficiency?
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
The phenomenon of damping results in decrease in
The instrument, which measures temperature by radiation, is called
A wave in which the particles of the material move up and down as the waves goes from left is called a
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?
Sound above the frequency of 20000 Hz is called
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
Which of the following about the speed of sound is correct?
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?
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?
Material a is a water and material b is a glass with index of refraction 1.52. If the incident ray makes an angle of 60o with the normal, find the direction of the reflected ray.
“The Acceleration of a particular body is directly proportional to the resultant force acting on it and inversely proportional to its mass” is a statement of
The fluid pressure is the same in all directions. This is known as
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".
