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Assume the retail price of electricity is $.18 per kilowatt-hour
1. What does it cost to leave a 200 watt light bulb on for 10 hours ?
2. The little red light on some clocks and CD players consumes about 2 watts. What does it cost to have that light on for a month (30 days).
3. In 2003, the Schuylkill Generating Station near South Street on the Schuylkill River was rebuilt as an oil fired plant. It produces 175 Megawatts. What is the retail value of 1 day's production of electricity at this plant ?
suppose instead of using a 12-gauge diameter 2.05 mm solid copper cable you made a hollow copper cable of outer
An engine does 17200 J of work and rejects 6470 J of heat into a cold reservoir whose temperature is 272 K
We use two circular metal plates of radius 0.51 m and thickness 6.3 mm to build a capacitor. What is the capacitance of this capacitor
A gyroscope with rotational inertia 6.0 10-3 kg·m2 is precessing in a horizontal plane at 0.50 rad/s under the influence of a 0.28 N·m torque caused by a force pointing vertically downward
Your friend has a near point of 129 cm, How close can she hold a magazine and still read it clearly
Suppose the ray, in air with n =1.00, enters a slab with n = 2.34 at a 30.9°angle with respect to the normal, then exits the bottom of the slabinto water, with n = 1.33. At what angle to the normaldoes the ray leave the slab?
question a what is its kinetic energy at this moment?question b find the net work done on the object if its velocity
An inductor used in a dc power supply has an inductance of 12.0H and a resistance of 170 OMEGA . It carries a current of 0.300 A. What is the energy stored in the magnetic field
A 70 ohm lamp and a 75 ohm lamp are connected in series and placed across a potential of 41 V. What is the equivalent resistance of the circuit
A heavy sled is being pulled by two people as shown in the figure. The coefficient of static friction between the sled and the ground is µs = 0.627, what is the minimum rope tension required
A particular engine has a power output of 6.00 kW and an efficiency of 28.0%. Assume the engine expels 7000 J of energy in each cycle. Find the time required to complete each cycle
A mixture of 25 lb mol N2 and 75 lb mol CH4 is being heated from 400°F to 800°F at 1 atm pressure. Calculate the total amount of heat needed
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