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The lighting needs of a storage room are being met by 6 fluorescent light fixtures, each fixture containing four lamps rated at 60 W each. All the lamps are on during operating hours of the facility, which are 6 AM to 6 PM 365 days a year. The storage room is actually used for an average of 3 h a day. If the price of electricity is $0.08/kWh, determine the amount of energy and money that will be saved as a result of installing motion sensors. Also, determine the simple payback period if the purchase price of the sensor is $32 and it takes 1 hour to install it at a cost of $40.
noting that a person standing in a room maintained at 20degc at all times the inner surfaces of the walls floors and
H2O at 50 kPa and 200 degrees C is compressed in a reversible, isothermal process with steady flow until it exists as a saturated vapor. Find w, q, and draw on a t-s diagram and p-v diagram
to determine the viscosity of a liquid of density 948 kgm3 you fill to a depth of 12 cm a large container whichdrains
a steam power plant operates on a rankine cycle between pressure limits of 0.08 bar and 80 bar. the heat added by
Design and draw a circuit using the cascade system to operate two cylinders (A and B) which, on the operation of a start valve, produces the sequence
a refrigerator operates with a coefficient of performance of 4.2 and requires an electrical input of 700 w. determine
Arc Length Element Find the square of the element of arc length ds in cylindrical and spherical coordinate systems. Plane through Three Points Show that the equation of a plane that includes the three points
Please find the mass of gasoline fuel injected into each cylinder in each working cycle.
a 20 kg object is pulled across a flat surface with a force of 100 n. the force is applied at a 30deg angle to the
If the average chord is 0.4 m, then calculate the laminar, skin-friction drag force on the wing at a speed of 60 km/h (use air properties from Table 1.1). Do you think the actual drag of the wing is higher?
World population growth. From the dawn of humanity to 1830, world population grew to one billion people. In 100 more years (by 1930) it grew to two billion, and 3 billion more were added in only 60 years (by 1990). In 2009, the estimated world pop..
to study the performance of a race car a high speed camera is positioned at point a. the camera is mounted on a
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