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Question: Air consumption for a 4-stroke SI engine is measured by means of a circular orifice of diameter 30 mm. The Cd for the orifice is 0.63 and the pressure across the orifice is 155 mm of water. The barometer reads 750 mm of Hg. Temperature of air in the room is 37oC. The piston displacement volume is 1780 cc. the compression ratio is 6.8. The fuel consumption is 8 kg/hr and having heating value of 43.6 MJ/kg. The BP developed at 2500 rpm is 28 kW. Determine,
(a) volumetric efficiency,
(b) air-fuel ratio,
(c) brake mep, and
(d) relative efficiency on the brake thermal efficiency basis.
A 2 g lead (cp = 128 J/kg•°C) bullet travelling at 325m/s is stopped by the large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet whereas the other half is transmitted to the tree, wha..
The left end of a long glass rod 7.00cm in diameter has a convex hemispherical surface 3.50cm in radius. The refractive index of the glass is 1.60. How far from the left end of the rod must the object be located to form the image
A patient recovering from surgery is being given fluid intravenously. The fluid has a density of 1040 kg/m3, and 9.54 10-4 m3 of it flows into the patient every five hours. Find the mass flow rate in kg/s
when an electric heater is turned on the nichrome heating element is at 0deg c and draws a current of 17 a with a
chlorine gas is generated in situ from hcl and naclo3 in an oxidation-reduction reaction. what compound is oxidized and
A sudent of mass m = 49 kg wants to measure the mass of a playground merry-go-round, which consists of a solid metal disk of radius R = 1.5 m that is mounted in a horizontal position on a low-friction axle. She tries an experiment:
At the equator the Earth's magnetic field has a direction horizontal with respect to the ground and toward the north with a magnitude of 5.0 x 10^-5 T. With what velocity (magnitude and direction) must an electron be fired
1) Find the wavelength of an ultrasonic wave emitted by a bat if it has a frequency of 4.0 * 10^4 Hz.
Point charges of 2.50nC are situated at each of three corners of a square whose side is 0.100m? What is the magnitude of the resultant force on a point charge
How much time is required for each stage, assuming a constant 20.0 kJ/s rate of heat transfer?
A stone is thrown with an initial speed of 14.4 m/s at an angle of 54 degrees above the horizontal from the top of a 32.1 m tall building. how long will the stone to reach the ground
A 400 kg roller coaster cart travels along the inside of a vertical circular track of radius 10 m. Find the cart's speed one quarter of a loop later
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