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Consider the circuit of three identical batteries and three identical bulbs connected exactly as shown here. In this problem, assume that each battery is a perfect physics battery supply voltage V and the bulbs are perfect ohmic devices with resistance R.
A friend of yours says, "That middle battery is hooked up backwards! The bulbs won't light if you hook the circuit up like that."
a) Respectfully and thoroughly explain to your friend that the bulbs will indeed light.
In your explanation, use both math and cenceptual understanding. Try using the ski-area analogy to help.
b) Find the voltage drop across each resistor
c) Find the power dissipated by each bulb and the total power dissipated by the circuit.
A thin film of polystyrene is used as an antireflective coating for fabulite (known as the substrate). What is the minimum thickness of film required
As part of a safety investigation, two 1800 cars travelling at 18 are crashed into different barriers. Find an average forces exerted on (a) car that hits a line of water barrels and takes 1.80 to stop, and (b) car that hits a concrete barrier and ta..
Fleas can jump quite high; experiments show that they reach an altitude of 130 times their own height when they jump vertically! Suppose instead that a flea can jump, What is the take-off speed for this flea
The image of a tree on a 35 millimeter color slide is 1.9 millimeter high. It is to be projected onto a screen 10 meter from the slide, and is to appear 370 millimeter high. Evaluate what is the magnification of the system
a person of mass 50 kg stands on an accurate scalethat reads force in newtons in an elevatora draw a free body diagram
The number of states is expressed as a function of various parameters for three systems below. For each, find an "equation of state" which gives the relationship between p, V, N, and T.
A solid cylinder of mass m, radius r, and rotational inertia 0.5mr^2, starts at rest from the top of a ramp of height h. what would be the speed of the cylinder at the bottom
When a person inhales, air moves down the windpipe at 15 cm/s. determine the pressure drop of the constriction
Sirius is about 9.0 light-years from Earth. How far is the trip according to you and How long would the trip take according to an Earth-based observer
A person swimming underwater sees a lifeguard who is standing in the shallow part of the pool; the water comes up to the lifeguard's waist. In what way does the swimmer see lifeguard's upper body distorted.
A loudspeaker of mass 25.0 is suspended the distance of = 2.40 below ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 2.50. What is the tension in each of cables.
A circular loop of wire 60 mm in radius carries a current of 100 A. At the center of the loop, what are the following? The magnetic field strength. The energy density
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