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A 4-m x 5-m x 7-m well-sealed room is to be heated by 1500 kg of liquid water contained in a tank that is placed in the room. The room is losing heat to the outside air at 5°C at an average rate of 10,000 kJ/h. The room is initially at 20°C and 100 kPa and is maintained at a temperature of 20°C at all times. If the hot water is to meet the heating requirements of this room for a 24-h period, determine
(a) The minimum temperature of the water when it is first brought into the room and
(b) The entropy generated during a 24-h period. Assume constant specific heats for both air and water at room temperature.
Two 2.0-cm-diameter disks spaced 2.0 mm apart from a parallel-plate capacitor. The electric field between the disks is 5.0 x 10^5 V/m. What is the voltage across the capacitor? How much charge is on each disk?
A space vehicle is traveling at 4150 km/h relative to the Earth when the exhausted rocket motor is disengaged, What is the speed (km/h) of the command module relative to Earth after the separation
A 15.0 kg box is released ona 36.0° incline and acceleratesdown the incline at 0.271 m/s2. What is the coefficient ofkinetic friction
Describe fully the steps involved in manufacturing integrated circuits - The company wants customers to know about a variety of logic implementations. One page they want you to write is on the operation of transistor-transistor logic. Write a sh..
A 2.5 meter long pole is balanced using a cord. The wall is on the left and the cord is horizontally attached to the pole, making a 90 degree angle. The pole is making contact with the floor at 60 degree angle. Draw a careful lever arm diagram for th..
Here are the familiar pair of carts connected by a spring. What are the relative speeds of the carts when the spring is released?
A certain type of laser emits light that has a frequency of 5.4 x10^14 Hz. The light, so, occurs as a series of short pulses, each lasting for a time of 2.7 x10-11 s.
The light shining on a diffraction grating has a wavelength of 490 nm (in vacuum). The grating produces a second-order bright fringe whose position is defined by an angle of 9.85°. How many lines per centimeter does the grating have?
the two flat air ballons in the drawing are 3.2 meters and 61.0 meters above the ground. what is the horizontal distance x between the two balloons
A boat crosses a river of width w=100 meter in which the current has a uniform speed of 1.35 m/s. Obtain how far downstream from the initial position is the boat when it reaches the opposite shore
create a presentation or power point. you can go to www.microsoft.com and search for brochure and powerpoint
A stunt drives a car at a speed of 20.0 m/s off a 30.0 high cliff. The road leading to the cliff is inclined upward at an angle of 20.0. How far from the base of the cliff does the car land
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