An iPhone battery stores 6.55 Wh of energy. How many iPhones could be charged in one day by a small solar panel of dimensions 0.54 m X 0.35 m. Assume that this panel has an efficiency of 18% and is in Gainesville where we get 5.47 kWh/m2/day. Roundoff the number to zero decimals.

Q: What is the electrical energy stored per 1 squared micron of cell membrane at the voltage -70 mV?

A: Area of cell membrane=A=1 micron2=1×10-62 m voltage=V=-70 mV=-70×10-3V

Q: 100 identical capacitors of C=10F are arranged in series in an electric circuit. What is the…

A: We have n=100 capacitors all having value of capacitance C=10 F that are connected in series with…

Q: Every day a certain household uses a 3,3 kW electric stove for 72 minutes, six 6 hours each and…

A: Every day a certain household uses a 3.3 KW electric stove for 72 minutes,  six 100 W light bulbs…

Q: Compare the energy consumption of two commonly used items in the household. Calculate the energy…

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Q: For d=10 calculate the ɛ, for plastic plate. V(V) Q(C) d(mm) 2.3 10 v Cmeasuring amp.=0.22 x 10-6 F…

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Q: The cost of electricity in Saskatoon is currently about 16.35 cents/kWh (including carbon tax). At…

A: Given data: Cost of electricity = 16.35 cents/kWh Power (P) = 80.0 W Time (t) = 2 weeks

Q: The electrical potential at any point in an _________ is electric potential energy per unit charge…

A: The electric potential at a point is given by, Potential, V=14πε0qr Where, ε0=Permittivity of free…

Q: A 2.21-kg steel ball is dropped from a plane to an ocean. If the velocity of the ball just before…

A: Given : m=2.21kg              u=1.67m/s     (initial velocity)              Fb=-2.65v…

Q: A chocolate chip cookie contains about 200 kcal. how long could you power a 100-W light bulb with…

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Q: 16a)Based on our learning from the practical ‘Determining the cost of boiling water’, suppose that I…

A: Total energy consumed = P×t  = 2000W × (15/60)h  = 500wh  = 0.5 kWh

Q: An engineer creates a model to predict the electric consumption of a household in summer in a day…

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Q: For the circuit shown in the figure, determine the magnitude of the currents I2, I3, and 14 passing…

A: Given:- A circuit is given as  The values are  ε1=24 V ε2= 3.0 V ε3= 22.5 V ε4= 1.50 V R1= 39.0Ω…

Q: Assuming that the diet of an average Canadian consumes 2,500 food calories per day (1 cal=4200 J),…

A: We are given energy consumption by food of 1 person. We first calculate energy consumption of 5…

Q: What is the useful energy output when a 60 W light bulb is on for 2 hours? Recall, traditional light…

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Q: What is the yearly cost, in dollars, of operating such a clock if the cost of electricity is $0.125…

A: Power of clock (P) = 3.1 W cost of electricity = $0.125 per kWh

Q: A water jet consumes 3950W for 126 hours a week What is the energy consumed (kWh) for a one-year…

A: Given Power consumed by water jet =3950 W =3.950 kWh Used for 126 hours a week.

Q: Ex. 86 : Two condensers each of capacity 4 µF are connected in series and third condenser of…

A: Concept: According to the Question Two capacitor are connected in series and there combination is…

Q: use 4. A 12.0-kg mass is dropped from a hot air balloon at a height of 345 m above the ground. Find…

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Q: Plot 1 in Figure (a) gives the charge a that can be stored on capacitor 1 versus the electric…

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Q: roblem 5: Suppose you have have a 1100 W toaster. Part (a) How much electrical energy in J is…

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Q: A refrigerator using 1030 W runs two-thirds of the time. How much does the electricity cost to run…

A: A refrigerator using 1030 W runs two-thirds of the time. How much does the electricity cost to run…

Q: Calculate the cost of leaving 1300 W refrigerator for a year, if the electric company charges you 12…

A: Write the formula for the total amount of power used in a year. Ptotal=watts×hours used per day×days…

Q: R2 = 576 2 R = 576 2 ww R3 = 576 2 ww

A: Given: R1=576 ΩR2=576 ΩR3=576 Ω The supplied voltage is 120 V.

Q: fluorescent bulb is typically 4 times more efficient than an incandescent bulb. For example, a…

A: Power saved = 60 -15 = 45 W   time =1 year = 365 × 24 × 60  × 60  = 31536000 sec

Q: 49.) When you use electrical appliances you are using electrical energy based on the amount of the…

A: It is given that,

Q: 1 Joule is Equal to how many erg

A: Joule is equal to energy transferred to an object when a force of One Newton acts on that object in…

Q: Electric Power Directions: Answer the following problem, write your answer with complete solution.…

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Q: a two storey house in Portland, ME with dimensions 8.5m by12.0m with a height of 7.0m is heated…

A: Given: Cost of 1 kWh is = 0.11 INR. Consumption by room in one hour = 1000 W. length of room (l) =…

Q: A solar panel of length L and width W produces 28.4 kWh in a day. Under the same conditions (i.e.…

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Q: Doard A QUESTION 27 In the figure, &, = 3.00 V, ₁ = 1.00 V, R₁ = 4.00.2, R₂ = 2.002, R₂ = 5.00.2. E…

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Q: A refrigerator using 1028 W runs one-third of the time. How much does the electricity cost to run…

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Q: A 1100 W toaster takes one minute to toast a slice of bread. At 9.0 cents/(kW.-h), how much does the…

A: Time to toast a bread = 1 minute = 1/60 hour Power of toaster = 1100 W cost= 9.0 cents/kWh

Q: A 1.5 kW kettle is used 5 times a day for five minutes each time. What is the cost of running the…

A: Given Power of kettle P = 1.5 kW Cost of 1 unit electricity is = 5.00/kWh

Q: What is the available energy content, in joules, of a battery that operates a 2.00-W electric clock…

A: Given data: Power, P=2.00 W Time taken, t=540 days

Q: Calculate the number of kilowatt-hours (kW-hrs) consumed in a week by two 60-Watt incandescent light…

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Q: ne 9-volt battery contains 19.7 thousand joules of energy.  A 4-pack of 9-volt batteries cost $10.31…

A: The energy in one battery E =19.7×103 J Total energy of 4 pack 9V battery is 4E The power is 1 Watt…

Q: 5. An electric heater has a power rating of 1500 watts (1.5 kW). If the heater is run for 6 hours,…

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Q: A sump pump turning at 1600 rpm provides a discharge of 9 gpm against a head of 18 ft. Compute the…

A: Given: From the given data, h=18 ft N=1600 rpm Q=p gpm

Q: A water jet consumes 3650W for 126 hours a week What is the energy consumed (kWh) for a one-year…

A: Given,  The circulating pump consumes 3650W per hour. If it is on for a week i.e. 126 hrs then,…

Q: To recharge a 12 V battery, a battery charger must move 4 × 105 C of charge from the negative…

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Q: You decide to relax for the night by playing video games on your Playstation 3. You lose track of…

A: Given that, PS3 consumes power at the rate of 197 watts/hr And Plasma TV consumes power at the rate…