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In 1937, Dr. Willis Haviland Carrier (1876-1950) developed an air conditioning system to cool the air in the Magma Copper Mine in Superior, Arizona.
It reduced the air temperature at the 3600 ft level from 133°F to 71.0°F after 4 months of operation. Each air conditioning unit in the system had a capacity of 140. tons of cooling and was driven by a 200. hp electric motor.
Determine the coefficient of performance of these units.
Assume your eyes are located 16 cm below the top of your headand 172 cm above the bottom of your feet. You are standing 200cm in front of vertical wall. What is the length of the shortest mirror that can be hung on the wall to enable you tosee your..
State Newton's three laws of Motion and What is the difference between elastic collision and inelastic collision
a 0.107-kg ball is dropped from a height of 1.03 m and lands on a light approximately massless cup mounted on top of a
Assume you weight is 128 lb. Compute your weight in N. Compute your mass in kg. Compute your mass in slugs
A frog in a hemispherical bowl finds that he just floats without sinking in a fluid whose density is 1.35 g/cm^3. If the bowl has a radius of 6cm and negligible mass, what is the mass of frog.
It is known that the electric force of repulsion between two electrons is much stronger than the gravitational attraction. For two electrons at a distance d apart, calculate the ratio of the size of the electrostatic repulsion to that of the gravi..
A 2 kg ball is thrown straight up in the air. What is the net force acting on the ball when it reaches its maximum height?
A series RLC circuit with L = 12 mH, C = 2.9 F, and R = 6.1 is driven by a generator with a maximum emf of 115 V and a variable angular frequency . (a) Find the resonant (angular) frequency 0.
Which object has the higher temperature after being left outside for an entire dark winter night: a metal door knob or a styrofoam pad?
Two long straight wires are parallel and 10 cm apart. They areto carry equal currents such that the magnetic field at a point halfway between them has magnitude 240 µT. How much current(in A) is needed?
Determine the problem: Consider the relationship between an unbalanced force, mass, acceleration, and velocity (speed)
A Doppler blood flow unit emits ultrasound at 5.0 mHz. What is the frequency shift of the ultra sound reflected from blood moving in an artery at a speed of 0.20 m/s?
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