Problem 1. AC Circuits-four short questions. (a) Explain the difference between instantaneous, peak, and RMS quantities, and give some examples of when it is appropriate to use each one. (b) For electrical power, (instantaneous) p is only true sometimes. Give a situation where it works, and a situation where it fails, and explain why it fails. = iv is always true, but (average) Pavg Irms Vrms (c) AC circuits gained prevalence over DC circuits for power distribution because of the ease of transforming between high and low voltage. Explain why a transformer (which uses magnetic induction between two coils of wire) works for AC but not for DC. (d) Suppose an electrical distribution line has a resistance of 1 ohm and needs to deliver 1 MW (megawatt) of electrical power. Is it more efficient to deliver that power at Vrms at Vrms question. (Hint: Actual distribution lines are high-voltage, so...) = 120 V or 120 kV? Calculate the power wasted as heat in the distribution line to answer the

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Q: C object D f E A В

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A: mass of person, M=61.8 kg Sled mass, m= 20.9 kg Sled speed, vs = 5.49m/s

Q: solve the following equations for x: d^2=(x)^2+(y)^2 v^2=v^2o+2a(x-xo)

A: To solve for x : A) d2 = x2 + y2

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Q: Calculate the magnification of this image. Original Object 6 cm 4 crm Image on Screen 30 cm 20 crm

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Q: How do you determine the focal length of both a convex and concave lens?

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Q: Is the image real of virtual?

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A: Given : f1 = 7.5 cm f2 = 35 cm d = 25 cm

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Q: Algae

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Q: as each experiment will be ass that is roughly 10%-20% There is no need to be terr

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Refraction of Light

Refraction is a change in the direction of light rays when they travel from one medium to another. It is the bending of light when it goes through different media.

Angle of Refraction

Light is considered by many scientists to have dual nature, both particle nature and wave nature. First, Particle nature is one in which we consider a stream of packets of energy called photons. Second, Wave nature is considering light as electromagnetic radiation whereas part of it is perceived by humans. Visible spectrum defined by humans lies in a range of 400 to 700 nm wavelengths.

Index of Refraction of Diamond

Diamond, the world’s hardest naturally occurring material and mineral known, is a solid form of the element carbon. The atoms are arranged in a crystal structure called diamond cubic. They exist in a huge variety of colours. Also, they are one of the best conductors of heat and have a very high melting point.