An AC source with a frequency of 60 Hz is connected to a lightbulb. The instantaneous brightness of the lightbulb depends on the magnitude of the instantaneous current. Explain why the brightness of a bulb can flicker. Why don’t we notice the flicker?

Q: If an object has O acceleration, it may infer that i. The object is at rest ii. The object is moving…

A: The acceleration of a body and the velocity of the body are related as a = dvdt

Q: How much heat transfer occurs from a system, if its internal energy decreased by 150 J while it was…

A: Given: Internal Energy (△U) = - 150 Joule Net work done ( W) = 30 Joule

Q: A 12-Newton force was applied to a 1.5-kg mug of root beer. It accelerates from rest over a distance…

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Q: R-18.0 2 R 6.00 2 9.0 V R- 3.00 2 3.0 V

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Q: Solve for the following application of first order differential equations. Show your solutions. 4. A…

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Q: Qo Vo = 120 V C = 8.0 µF C2 = 4.0 µF We connect a capacitor C1 = 8.0 µF to a power supply, charge it…

A: Given data- Capacitor C1=8.0 μF,  C2=4.0 μF Potential difference V∘=120 V

Q: A 2400-kg pile driver is used to drive a steel beam into the ground. The pile driver falls 3.00 m…

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Q: The drawing shows two long, thin wires that carry currents in the positive z direction. Both wires…

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Q: A 2400-kg pile driver is used to drive a steel beam into the ground. The pile driver falls 3.00 m…

A:

Q: A motor boat moves at a steady speed of 4 m/s. Water - resistance acting on it is 2460 N. Calculate…

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Q: The rocket starts from rest t = 0 and travels straight up. its height above the ground can be…

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Q: 13.1 A car drives through portion AB of the S-curve at constant speed, decel- erates in BC, and…

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Q: A proton (m = 1.67 x 10-27 kg, q = 1.60 x 10-19 C) is moving in a 3.23 x 10-4 T magnetic field in a…

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Q: There are 2.375 x 10^19 electrons passing through a headlight. What will be the voltage of the car…

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Q: What is the weight of a 70-kgm man at standard condition?

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Q: A pendulum with a massless string of length L has attached at its end a particle of mass 65.00 kg.…

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Q: Figure shows a circuit with an area of ? = 0.060[m2] containing a ? = 1.0[Ω] resistor and a ? =…

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Q: Inelastic Collision BEFORE AFTER m1=1400 kg m2=1000 kg m1=1400 kg m2=1000 kg V1=14 m/s v2=20 m/s…

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Q: The electric potential, or voltage, at any point in an electric field is the electric potential…

A: The direction of electric field is from a positive charged side to the negative charged side. So,…

Q: 2) Place a checkmark next to all true statements. The deeper you go under water, the more pressure…

A: To identify : The correct statementsLet a person is at depth "h" below the surface of water Let the…

Q: Three point charges q, = +2.7µC, q2 =-3.4µC and q3 = -1.6µC initially are infinitely far apart. They…

A: The work done = F.dr = KqQ/r in taking aggroup of charges from infinity to a finite distance in an…

Q: A car is traveling with an initial speed of 80 km/h and accelerates at 0.50 m/s2 along a straight…

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Q: R-18.0 2 R 6.00 2 R 3.00 S2 9.0 V 3.0 V 13

A: When two cells (their EMFs are E1,E2 and resistances r1,r2) are connected in a parallel combination…

Q: You have a lens whose focal length is –5.05 cm. You place an object on the axis of the lens at a…

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Q: A proton moves through a region of space where there is a magnetic field B = (0.491 + 0.40]) T and…

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Q: An elevator weighing 22 000 N is supported by a steel cable. What is the tension in the cable when…

A: Force=22000N Acceleration=3.50m/s²

Q: A 9.17 mm high chocolate chip is placed on the axis of, and 11.5 cm from, a lens with a focal length…

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Q: What must be the mass of block A if it is to descend 12 m in the first 3s after the system is…

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Q: Refer to the sample problem above. Find the potential at the center of the square if two of the our…

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Q: 11. Shown below are four (4) arrangements of capacitors. Each has an equivalent capacitance. Rank…

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Q: Determine the time needed to pull the cord at B down 4.42 ft starting from rest when a force of…

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Q: Problem 8 :We wish to coat a flat slab of glass (n-1.5) with a transparent material (n-1.25) so that…

A: Solution is given in step 2

Q: A pendulum with a massless string of length L has attached at its end a particle of mass 65.00 kg.…

A: Draw the free-body diagram of the particle. Determine the length x.

Q: The ideal size (most efficient) for a broadcast antenna with one end on the ground is one-fourth the…

A:

Q: A circuit composed of a 24-V battery and four resistors connected in a series connection, whose…

A: Q 1) Part a) The total resistance in the circuit of the 4 resistors connected in series is Rt =…

Q: Why is the usage of Kirchhoff's Laws instrumental in the study of electricity? Isn't the knowledge…

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Q: Two point charges q1 = 2.2nC and q2 = -1.5nC are 13 cm apart. Point A is midway between the charges…

A: Given data- charge q1=2.2 nC, q2=-1.5 nC point A is midway between the charges. Point B is 12 cm…

Q: Electron microscopy is a technique that uses the wavelike properties of high-speed electrons to…

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Q: 20-V potential difference is applied across a series combination of a 10-Ω and a 30-Ω resistors. The…

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Q: A little boy is in a treehouse, 25 feet up in a tree. He lifts a 2-lb rope that reaches the ground…

A: A) mass lifted = 2 lb height = 25 ft

Q: 1. A spaceship at rest relative to a nearby star in interplanetary space has a total mass of 2.50 x…

A:

Q: that

A: Given, Mass(M)=13 kg. Displacement=65 cm=65/100 m=0.65 m. g=9.8 m/s²

Q: In the figure, a 2.0-m-long vertical pole extends from the bottom of a swimming pool to a point 50.0…

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Q: Explain in words using physics concepts why inserting a dielectric material into a capacitor…

A: When we fill the capacitor with a dilectric material  Then it's capacitance gets increased. Reason…

Q: 5. A charge, q, = 7.98 µC, is at the origin as shown in the figure below, and a second charge, q2 =…

A: q1= 7.98 x 10-6 c q2= 5.99 x 10-6 c

Q: A 5.95 mm high firefly sits on the axis of, and 11.7 cm in front of, the thin lens A, whose focal…

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Q: nts. tude veen 1.49 · For the vectors A and D in Fig. El.28, (a) find the magni- tude and direction…

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Q: 1. What is the electric field strength at a distance of 10 cm from a charge of 2 uC? 2. Having a…

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Q: A. A34 cm -long straight wire cuts through the center of the solenoid, along a diameter. This wire…

A: GivenN=550 turnsL=17 cmI=34 AFor wireLw=34 cm=0.34 mIw=30 A

Q: A concave mirror has a focal length of 43 cm. The image formed by this mirror is in front of the…

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