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A power boat of mass 500 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume -- contrary to fact -- that the resistive force due to the water is constant, independent of the boat's speed.
(a) How far does the boat coast? (b) How much time does it take for the boat to come to rest after the engine is turned off?
Advantages and disadvantages of three phase system over single phase system 1. In a single phase circuit the power distributed is pulsating. In three-phase system the total
A windmill is operating in a 10 m/s wind that has a density of 1.2 kg/m 3 . The diameter of the windmill is 4 m. The constant-pressure (atmospheric) stream tube has a diameter of 3
What is Crystal twinning Crystal twinning occurs when two divide crystals share some of the same crystal lattice points in a symmetrical manner. The result is an intergrowth of
A circuit having of a 10μF capacitor connected in series with a 25 k resistor with a switchable 100V d.c. supply. When the supply is connected, calculate (a) The time constant,
The light passing through a quarter wave plate is analysed by a rotating Nicol prism. It is get that the intensity of the emergent light beam from the rotating Nicol prism becomes
Interconnection of cells: Cells may be connected in series, parallel or any combination of the two in order to form a battery. When cells are connected to form a battery they s
1. Calculate the entropy change when 1 kmol of an ideal gas at 300 K and 10 bar expands to a pressure of 1 bar if the temperature stays constant. 2. What is the change in entrop
Two wires on a piano are the same length and are pulled by the same tension. wire 1 vibrates at a frequency 1.5 times the frequency of wire 2. Calculate the ratio of their masses (
Explain moment of inertia Moment of inertia is the term used to calculate or quantify the amount of mass located at an object's extremities. For instance if all the mass of an
If either screen or source or both are at preset distance from the diffracting device (obstacle or aperture), the diffraction is known as Fresnel type.
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