Lightbulb A was found out to give 30.0W of power, producing the same brightness as lightbulb B operating at 95.0W. The lifetime of A is 9,000 hours and can be bought at Php229.00. B has lifetime of 750 hours and can be bought at Php39.00. Which bulb is more efficient in energy saving? Determine the total amount saved when choosing the efficient bulb over the same period of time. Assume that Meralco charges Php 9.65 per kWh.

Q: Water flows over a section of Niagara Falls at a rate of 1500 kg/s and falls 75 m. How many 60-W…

A: Given: The rate of fall of water is 1500 kg/s. The height of the fall is 75 m. The power of the bulb…

Q: A refrigerator does 270,000 J of work in 30 minutes. How much power does it generate? 30 minutes =…

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Q: Which vector diagram represents the vector subtraction R = P – Q? А. С. D. to B.

A: SInce  P-Q=P+(-Q) Option C

Q: A water pump in a building complex pumps water up to a height of 22.0 m at a rate of 130.0L/minute.…

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Q: What is the cost of operating a 5.00 W electric clock for a year if the cost of electricity is…

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Q: The electric motor of a model train accelerates the train from rest to 0.765 m/s in 24.5 ms. The…

A: a)power is defined as the work per unit time.work is nothing but change in kinetic energy.in this…

Q: A 15.1-kg box is being pushed from the bottom to the top of a frictionless ramp. When the box is…

A: Write the given values with the suitable variables. m=15.1 kgW=58 Ju=0 m/sv=1.50 m/s Here, m, W, u,…

Q: The basis of muscle action is the power stroke of the myosin protein pulling on an actin filament.…

A: Input energy, Ein=5.1×10-20J Displacement, d=10nm=10×10-9m Force, F=1.0pN=1.0×10-12N

Q: A 2,400-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 4.80 m…

A: GIVEN:- Mass of pile driver = 2400 kg Hight by which pile driver falls before coming into contact…

Q: A large household air conditioner may consume 13.0 kW of power. What is the cost (in $) of operating…

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Q: How long will it take a 2100 W motor to lift a 300 kg piano to a six story window locate 16.0 m a…

A:

Q: Which energy diagram represents the energies of a 50 kg object as it falls from the top of Niagara…

A: A)Given-The mass of the object, the height of Niagra Falls, Solution:The kinetic energy at the top…

Q: Part An ice cube is placed in a microwave oven. Suppose the oven delivers 135 W of power to the ice…

A: Given data: Power (P) = 135 W Energy (E) = 31200 J Required: Time (t)

Q: In a particular city, electrical energy costs $0.13 per kilowatt-hour. (Round your answers, in…

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Q: A lightbulb has an average power output of 125 watts. If the lightbulb is left on for an hour, what…

A: Given: The power output of the lightbulb is 125 W. The running time of the bulb is 1 hour.…

Q: While hovering, a particular flying insect applies an average force equal to three times its weight…

A: Givenmass, m=1 gm               =0.001 kgdisance, d=1.5 mm                  =0.0015 mstrokes,…

Q: An electric heater of 1000 W is used for two hours in a day? What is the cost of using it for a…

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Q: The electric motor of a model train accelerates the train from rest to 0.520 m/s in 30.0 ms. The…

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Q: A family in Charlotte wants to drive to a campsite next to Mt. Mitchell. Their trip will take them…

A: (1) Energy left is Tesla’s battery when it gets to campsite ETLeft=ET-Ereq=100 kWh-79 kWh=21 kWh

Q: The electric motor of a model train accelerates the train from rest to 0.560 m/s in 33.0 ms. The…

A: Given : Initial speed (vi) = 0 because train starts from rest Final speed (vf) = 0.560 m/s Time (t)…

Q: A large household air conditioner may consume 15.0 kW of power. What is the cost of operating this…

A: The total time in hours for which the air conditioner operates is

Q: Suppose that your refrigerator consumes 150 W of power. If the cost of electricity is $0.15 per…

A:

Q: A large household air conditioner may consume 14.0 kW of power. What is the cost of operating this…

A: Unit of power=KiloWatt=KW Unit of Time=hour Power=Energy/time Energy=Power X time Unit of energy is…

Q: Fariya, a 53 kg female was instructed by the trainer to perform exercise on cycle ergometer with a…

A: Given data: The mass of the female, m=53 kg. The resistance of the cycle ergometer, M=2 kg. The…

Q: A 137.6-kilogram object was pushed from rest to a speed of v meters per second, doing 21446.4 joules…

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Q: An electric water heater consumes 7.13 kW for 3.85 h per day. What is the cost (in dollars per year)…

A: An electric water heater consumes 7.13 kW for 3.85 h per day. In a year, the heater consumes…

Q: How long will it take a 25 W machine to produce 438 J of work?

A: Power(p)= Work/Time So, Time = Work/Power

Q: 103.07 J of work is done by a person who uses a force of 48.68 N to move a box, how far does it go?…

A: Answer:-  Given  Work done (W) = 103.07 J  Force (F) = 48.68 N  Distance moved(S) = ?  We know that…

Q: A gas-fired turbine generator for production electricity has an efficiency of about 50%. How many…

A: Efficiency is:         η=WQ W is heat output Q is heat given to the system. Amount of heat required…

Q: How long will it take a 1700 W motor to lift a 315 kg piano to a sixth-story window 15.5 m above?

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Q: Lightbulb A was found out to give 30.0W of power, producing the same brightness as lightbulb B…

A:

Q: this is a 23 watt energy efficient light bulb (1bulb) which cost 6.00.the retail price of…

A: The energy consumed by a device is given by E = P×t, where P = the power of the device t = time

Q: The electric motor of a model train accelerates the train from rest to 0.680 m/s in 15.0 ms. The…

A: As per the given data, Mass of the motor (m) = 830 g = 830×10-3 kg; Initial velocity (u) = 0 (rest);…

Q: How LONG DOES IT TAKE for a 75 Watt light bulb to burn out if it can 4 p perform 600,0dO J of work…

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Q: A power output of 18.0 h.p. is required to overcome friction and move a certain car at a constant…

A: The power required to move a body at a certain velocity is given by P = F×v, where F = the force…

Q: A clothes dryer uses 3000 W and is run fro 1 hour. If the total useful energy to dry the clothes is…

A: Given: Power of the dryer P= 3000 W  time to use dryer = 1 hour  Total useful energy to dry the…

Q: A 83kg person climbs a 6.2m ladder in 14s. What is the power out put for this process

A:

Q: How long will it take a 3750-W motor to lift a 425-kg piano to a sixth-story window 18.0 m above?

A: Given data: Power (P) = 3750 Watt Mass (m) = 425 kg Height (h) = 18.0 m

Q: A person in good physical condition is able to produce 100 W of useful power for several hours at a…

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Q: The electric motor of a model train accelerates the train from rest to 0.660 m/s in 16.0 ms. The…

A: The expression form work-energy theorem,

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.