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

A 12 cm tall bbject is placed 15 cm away from a convex miror of radius of curvature r=60 cm. How tall is the resulting image? Select one: t of Oa. -18 cm b. 18 cm O c. -8 cm O d. 8 cm

A2.71-cm-high insect is 1.24 m from a 135-mm-focal-length lens. Where is the image? O in front the lens O behind the lens How high is the image? Express your answer with the appropriate units. ? h = Value Units

Which option is best to do among (a-d)? USE IMAGE AS REFERENCE.

Please answer question 2, answer 1 is in the 2nd image

An air bubble inside a plastic ball with a diameter of 20.0 cm is 7.0 cm from the surface. When you look at the ball in the configuration in the figure below (observer, center of the ball, and bubble are on the same straight line), at what distance from the center of the ball will the image form? Consider nₚₗₐₛₜ=1.6 and nₐᵣ = 1 a)5.85 cm to the right of the center of the ball b)5.85 cm left of center of ball c)4.85 cm right from center of ball d)4.85 cm left from center of ball e)3.85 cm right from center of ball f)3.85 cm left from center of ball g)6.85 cm right from center of ball h)6.85 cm left from center of ball i)7.85 cm right from center of ball j)7.85 cm left from center of ball

Chapter 34, Problem 034 SN When an object is placed a distance p in front of a spherical refracting surface with radius of curvature r, the image distance is i. If the index of refraction of the surrounding material Is n1, what is the index of refraction of the refracting material? State your answer in terms of the given variables. n2 = 2 Edit