Joules vs watts
[DOC File]Coulomb’s Law Homework
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Suppose your electric lights use 400 watts per hour and average four hours per day, every day for one year. a.) How many kWh per year does this represent? 400 W= 400 J/s. 400 J/s ( 4h/d)(3600 sec/h) (365 d/yr) ( 1kWh/ 3.6 x 10 6 J)= 584 kWh/yr. b.) If replacing the lights with a fluorescent bulb would save 60 w per night, what savings in kWh ...
Joules to Watts Converter - convert Joules or KiloJoules to Watts, Ki…
Resistance is the slope of a Current vs. Voltage Graph. P. Power. Watts (W) ; 1W = 1J/1s. Power is a measure of the amount of energy/second that each element of the circuit uses. W. Work. Joules (J) Work is a f. orm of energy. OHMS LAW. You connect a 75 .
[DOC File]Stair-Climbing Power Lab
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How many joules of energy were used by the iron? (Hint: convert time to seconds). It take a clothes dryer 45 minutes to dry a load of towels. If the dryer uses 6,750,000 joules of energy to dry the towels, what is the power rating of the machine? A force of 100 newtons is used to move an object a distance of 15 meters with a power of 25 watts.
[DOC File]Energy and Power Test Study Guide – answer key
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If work is in joules (J) and time is in seconds (s), power is expressed in joules/second, or the simplification watt (W). James Watt was a British scientist who invented the steam engine. To find out how the power of his engine compared to that of a horse, Watt measured how fast an average horse could do work. He found the answer and expressed ...
[DOC File]Experiment 2L Joule's Law
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and has units of joules/second or watts (W). A machine is producing one watt of power if it is doing one joule of work every second. A 75-watt light bulb uses 75 joules of energy each second. Example 2. A motor raises a mass of 3 kg to a height h at a constant speed of 0.05 m/s.
[DOC File]Step 1: Run skewer through two corks as shown
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What is the power of a light bulb that converts electrical energy at a rate of 200 joules per second? (Power = Work ÷ time) 200 watts. What is the formula for power? Power = Work ÷ time. What is the formula for work? Work = force X distance. What is thermal energy? The total energy of the particles in an object. What is the unit for energy ...
[DOC File]www.alcaweb.org
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To estimate the total U.S. annual energy consumption, convert from Joules to kW-hr and estimate the total number of brewing/heating cycles performed per year. An educated guess at this value is 30,000,000,000 brewing/heating cycles per year, resulting in 4,000,000,000 kW-hr per year, with an energy cost of $400 million dollars per year!
[DOC File]Thermodynamics of Coffee Makers - Keysight
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Power = 2 (Torque) X RPS = 2 (0.0047 Joules) X 0.51 RPS = 15.0 m Watts. Relationship between Torque and RPS. Torque is high when RPS is low and RPS is high when torque is low. The permanent magnet motor has a linear (torque vs. RPS) relationship as shown below: Finding two points along this line will allow us to determine:
[DOCX File]Circuit Questions.docx
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If I is in amperes and R is in ohms then P is in watts. In a time interval Δt (in seconds) an amount of energy ΔE=P · Δt (in joules) will be released, in the form of Joule Heat. (1) BASIC FORMULA P = I2 · R. B) JOULE’S CONSTANT. The released heat is absorbed by the core of the . calorimeter. The amount of absorbed heat ΔQ (within a ...
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