Physics What is the total cost of using all of the following at 9¢ per kilowatt-hour? (i) A 1200-W toaster for 30 min (ii) Six 50-W bulbs for 4 h (iii) A 400-W washing machine for 45 min (iv) A 4800-W electric clothes dryer for 20 min

Q: Compact fluorescent bulbs aremuch more efficient at producing light than are ordinary…

A: Incandescent bulbs:The time the bulb is on in a course of three years is,t=3 years=365…

Q: A standard flashlight battery can deliver about 4.9 W·h of energy before it runs down. (a) If a…

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Q: How much energy is consumed by a 1.1 kW hair dryer used for 12 min? How much energy is consumed by a…

A: Given data Power consumed of hair dryer is P= 1.1 kW Time is t= 12 min =0.2 hour The amount of…

Q: In a certain city, electricity costs $0.12 per kW · h. What is the annual cost for electricity to…

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Q: You have a 1300 W toaster. How much electrical energy in Joules is needed to make a slice of toast?…

A: The objective of the question is to calculate the electrical energy consumed by a toaster in Joules…

Q: How much electrical energy (in kilowatt hours) would a 45.0 W light bulb use in 60.0 days if left on…

A: Given that                     The power of the bulb is (P) = 45W                      Time = 60days…

Q: What current is used by the 220 V AC electric heater which heats 2 kg of water (c = 4200 J/(kg K))…

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Q: Problem 36: Suppose the cost of an incandescent bulb is 23 cents and that electricity costs 15…

A: Cost of bulb = 23 cents cost of electricity = 15 cents/kWh Power of bulb = 60 W time = 1000 hrs

Q: There are approximately 103 million TVs in the United States. Each uses, on average, 76 W of power…

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Q: The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value.…

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Q: How much energy is consumed by a 1.0 kW hair dryer used for 11 min?  E= How much energy is…

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Q: A hair dryer is rated at 1200 W. One average, it is used for 400 minutes every month. The rate for…

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Q: The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value.…

A: Given, Electricity cost = 0.12$/kWh And power P=Et So, E=P.t a) Power = 40W total time, t =7days=…

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: An 11.0-W energy-efficient fluorescent lightbulb is designed to produce the same illumination as a…

A: Any component in an electrical circuit dissipates energy in the form of heat, light, sound, etc. For…

Q: At a price of $0.080/kWh, what does it cost to leave a 100-W security light on during a 10 hour…

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Q: How many kW of energy does a 650-W toaster use in the morning if it is in operation for a total of…

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Q: A circuit in a student’s room has a 15 A circuit breaker. One evening, she plugs in a computer (240…

A: In the household wiring, the electrical instruments are connected in parallel. Thus, in the room,…

Q: The average television set is said to be on 6 hours a day.   a) Calculate the yearly cost (total…

A: Given: Average time Television is ON = 6 h/day            Average power consumption = 130 W/TV…

Q: You and your roommates are studying hard for your physics exam. You study late into the night and…

A: The total power across the circuit can be obtained as

Q: One heater uses 340 W of power when connected by itself to a battery. Another heater uses 210 W of…

A: Given:- The first heater which is connected to the battery of V voltage uses a power  P1 = 340W The…

Q: Suppose that by mistake you leave ten 50-W light bulbs turned on at your house for 24 hr. Say that…

A: Given  Power P = 50 W Time t = 24 hours = 24 × 60×60 = 86400 sec

Q: In National Lampoon’s Christmas Vacation”, Clark Griswold is quoted as saying “250 strands of…

A: Given : Number of strands=n=250 Bulbs in each strand=b=100 Total bulbs=n x b=25000

Q: You and your housemate have an argument over the cost of the electric bill. You want to turn off the…

A: You and your housemate have an argument over the cost of the electric bill. You want to turn off the…

Q: Compact fluorescent bulbs aremuch more efficient at producing light than are ordinary…

A: Given: Power consumption of a fluroscent bulb is Pf=23.0WCost of compact bulb is Cfb=11.0$Power of…

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: Charging a cellular phone for 2 hours usually requires 1,080 Joules. What is the power rating of the…

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Q: A refrigerator using 1020 W runs one-third of the time. How much does the electricity cost to run…

A: The total time run by refrigerator ist=1330 days24 h=240 h

Q: A standard flashlight battery can deliver about 2.3 W-h of energy before it runs down. (a) If a…

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Q: A 75 W incandescent bulb and a 15 W compact fluorescent bulb, as shown, each produce 3.0 W of…

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Q: A particular household uses a 1.9 kW heater 1.8 h/day ("on" time), four 100 W lightbulbs 6.0 h/day,…

A: Heater power= 1.9 kw= 1900 wTime = 1.8 h/d4 Bulbs power= 4*100= 400 wTime =6 h/dElectric stove…

Q: 25.68 Compact Fluorescent Bulbs. Compact fluorescent bulbs are much more efficient at producing…

A: (a) Given,P=100Wlife time =750 hourspriceof bulb=0.75 bulbs are on for =4 hours3 years=3×365×4=4380…

Q: An electric heater is constructed by applying a potential difference of 127V across a wire with a…

A: Potential difference (V) = 127 V Resistance of the wire (R) = 5 ohms Power rating of the heater = P…

Q: You and your housemate have an argument over the cost of the electric bill. You want to turn off the…

A:

Q: A family goes on vacation for one week but forgets to turn off an electric fan that consumes…

A: Given data:  Power (P) = 200 W = 0.200 kW Total time = 1 Week Cost of electricity = 12.0 ¢/kW.h…

Q: The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value.…

A: Electricity cost  = $0.120 /kWh

Q: A clothes dryer uses 3,000 watts when the motor is running. A newer model uses 400 watts when the…

A: Given The power of the old cloth dryer is Po=3000 W=3000×10-3 =3 kW. The power of the new model of…

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 particular household uses a 1.9 kW heater 1.8 h/day ("on" time), four 100 W lightbulbs 6.0 h/day,…

A: Heater power= 1.9 kw= 1900 wTime = 1.8 h/d4 Bulbs power= 4*100= 400 wTime =6 h/dElectric stove…

Q: E = +10.0 V E, = -3.0 V E, = 0 V E,=1.5 V (a) (b) (c) (d) E = +7.0 V E, = -4.5 V E =-1.5 V E = -1.5…

A: Condition for proper running,           Vapplied ≤ 1.5 VSo,     Vapplied = V+-V-…

Q: A hair dryer is rated at 1850 W. Assuming there are 30 days in a month, what is the monthly cost of…

A: Given data:  Power (P) = 1850 W = 1.850 kW Daily uses = 12 minutes = 0.2 hours Number of days in a…

Q: You and your housemate have an argument over the cost of the electric bill. You want to turn off the…

A:

Q: Compact fluorescent bulbs aremuch more efficient at producing light than are ordinary…

A: Given: Power consumption of fluorescent, Pf=23.0 W,Power consuption of incandescent, Pi=100 W,Cost…

Q: One heater uses 370 W of power when connected by itself to a battery. Another heater uses 260 W of…

A: Given:- The first heater which is connected to the battery of V voltage uses a power  P1 = 370 W The…

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.