Suppose you use 60 kWh (kilowatt hours) of electricity at $0.31 per kWH, 96 kWh at $0.27 per kWh, and 87 kWH at $0.22 per kWh. What is your total kHW of electricity used?

Q: If the fifth order minimum in the diffraction pattern of a thin slit is at 40 degrees from the…

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Q: Two disks are rotating about the same axis. Disk A has a moment of inertia of 6.92 kg-m² and an…

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Q: Two resistors are connected in series with an 29.73 volt battery. The resistors have values of R1 =…

A: Given: The supply voltage is 29.73 V. The connection of the resistors is the series connection. The…

Q: The distance between the ruled lines on a diffraction grating is 1770 nm. The grating is illuminated…

A: Write the expression for the diffraction grating. sinθ=mλd Here, θ is the incidence angle, m is the…

Q: A mass weighing 4 pounds is attached to a spring whose constant is 2 lb/ft. The medium offers a…

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Q: Hint 1 A flywheel (a spinning disk) slows from 452 to 400 rev/min rotating through 46 revolutions.…

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Q: The system in the figure is in equilibrium. A concrete block of mass 277 kg hangs from the end of…

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Q: A boat radioed a distress call to a Coast Guard station. At the time of the call, a vector A from…

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Q: The capacitor with dielectric Co shown in the circuit is a parallel plate capacitor of area A=4x10³…

A: Given, The given combination of capacitors,

Q: a stone is fired 50m/s at what angle should take the stone be fired to travel 100m horizantally ?

A: Given              initial velocity by which stone fired = u = 50 m/s            required horizontal…

Q: D Question 1 When a sunfish is swimming, which of the following will result in forward longitudinal…

A: Question 1: Answer: Option 2: Negative lateral acceleration. The main function of surfacing is the…

Q: Diamond is a mineral with a very high index of refraction. Explain why you think that many ancient…

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Q: An oil film with refractive index 1.48 and thickness 290 nm is floating on water and illuminated…

A: Given, Refractive index, k = 1.48 Thickness, t = 290 nm = 290 x 10-9 m

Q: While moving from her third-storey apartment, a university student decides to lower her couch…

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Q: Suppose that you require a total inductance of 50 mH. You have available a 10 mH coil and a 22 mH…

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Q: A converging lens of focal length 19.7 cm is separated by 49.4 cm from a converging lens of the…

A: f1 = 19.7 cm f2 = 4.94 cm  image formed by the first lens is at a distance of di from the first lens…

Q: Complete Solution: Copy and answer. Box the final answer. 1.) An engineering student wants to build…

A: (1). Given, Force of the crate, F1 = 1815 N Force on small piston, F2 = 442 N Small piston area, A2…

Q: A 1,801-kg car starts from rest at the top of a driveway 6.14 m long that is sloped at an angle of…

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Q: A polka-dotted bowling ball is thrown horizontally off a cliff at 45 m/s. It takes 3.2 s for the…

A: Given data:  Initial horizontal velocity (v0x) = 45 m/s Time taken to hit the ground (t) = 3.2 s…

Q: A thin rod has a length of 0.298 m and rotates in a circle on a frictionless tabletop. The axis is…

A: GIVEN             length of thin rod =L= 0.298 m             angular velocity of rod=ωi =0.167 rad/s…

Q: A partly-full paint can has 0.515 U.S. gallons of paint left in it. (a) What is the volume of the…

A: We know ,  1 US Gallons = 3.78 * 10-3 m³ =>  0.515 US Gallons = 0.515 * 3.78 * 10-3 m³…

Q: Suppose you throw a rubber ball at an elephant that is charging directly at you (not a good idea).…

A: Let m1 = Mass of the ballm2 = Mass of elephantu1 = initial velocity of the ball before collisionu2 =…

Q: 2. In a gravity escape system (GES), an enclosed lifeboat on a large ship is deployed by letting it…

A: Given data, Height h=2.5 m Mass m=4970 kg

Q: The CN Tower, located in Toronto, Ontario, has a recorded height of 0.553 km. Refer to the…

A: Given data: Height of tower (h) = 0.553 km Initial velocity (u) = 0 m/s Time (t) = 3.00 s Required:…

Q: A mass is on an inclined plane with a length of 4 m and an angle of 30 degrees; the friction…

A: Draw the free-body diagram of the mass.

Q: Hoover Dam on the Colorado River is the highest dam in the United States at 221 m, with an output of…

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Q: 2. KLE 1. t t 3. t

A: 1st graph  This is  a uniform motion in a straight line  which means the speed(slope) is constant…

Q: N m EXERCISE HINTS: GETTING STARTED II'M STUCK! A businessman enters the same revolving door on the…

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Q: 11. A block of mass mi 2.40 kg is connected to a second block of mass m2 = 1.80 kg, as shown in the…

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Q: A rock is launched with an initial velocity of 137 m/s at an angle of 26 degrees above the…

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Q: The New England Merchants Bank Building in Boston is 152 m high. On windy days it sways with a…

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Q: Round the following measurement to the nearest hundredth:  35.147089m.

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Q: In the figure, one end of a uniform beam of weight 220 N is hinged to a wall; the other end is…

A: Given that A uniform beam of weight (W) =220N L is the length of the wire  The wire makes an angle…

Q: An alien spaceship traveling at 0.560c toward the Earth launches a landing craft. The landing craft…

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Q: Hello. These answers were incorrect.

A: Concept  According to Lenz's law, the direction of the induced current is such that it opposes the…

Q: A basketball is launched with an initial speed of 9.0 m/s and follows the trajectory shown. The ball…

A: Given, Launching speed of basketball (vo) = 9m/s  Angle with horizontal (θ)= 40°  Ball enter In the…

Q: 2. A hiker walking 10km west then 25km south. 3. A car driven 250km south then 150km west. [SCALE:…

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Q: 5. A small generator produces 17 V peak power at 25 Hz. (a) Find the root-mean-square (RMS) voltage.…

A: A small generator produces peak voltage, Vpeak=17 V at frequency f=25 Hz. The time period of the AC…

Q: A soccer ball of mass m1 = 0.57 kg is initially at rest. Another soccer ball of m2 = 0.498 kg is…

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Q: A mass attached to a spring has non-constant acceleration a(t) = - cos ((pi*t)/4) * m / (s ^ 2)…

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Q: Use Bernoulli’s equation to estimate the upward force on an airplane’s wing if the average flow…

A: Write Bernoulli’s equation between the top and bottom of the airplane’s wing.…

Q: You stand near the end of a uniform diving board a distance d from support 2 (as shown in the…

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Q: (Figure 1) shows your 1.5 kg laptop computer being dragged up a 25° slope at steady speed by a rope…

A: As Tension force and displacement are in same direction then work done : WT=T×∆r       =20×2…

Q: kid runs towards the edge of a merry-go-round that is not rotating and jumps on. The merry-go-round…

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Q: A bullet is fired from a rifle (event 1) and then strikes a soda bottle, shattering it (event 2). Is…

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Q: Two window washers, Bob and Joe, are on a 3.00-m-long, 315-N scaffold supported by two cables…

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Q: Find the energy released in the alpha decay of 22086Rn (220.01757 u). (Hint: 21684Po has a mass of…

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Q: The wheels, axle, and handles of a wheelbarrow weigh W= 68 N. The load chamber and its contents…

A: GivenW =68 NWL = 591 N

Q: An iron boiler of mass 200 kg contains 590 kg of water at 20 °C. A heater supplies energy at the…

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Q: A real object in front of a convex spherical mirror can produce an image that is virtual, erect and…

A: Given data:  A real object in front of a convex spherical mirror Required: The nature of image

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.