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1. Suppose that you measure the resistance of a resistor using a voltmeter, a current meter, and a battery. Suppose that the voltmeter reads 0.2 % high and the current meter reads 0.3 % low. What will be the percent error in your measurement of resistance? (Hint: If you do not know how to work this problem with abstract mathematics, try making up a numerical example that meets the given conditions.)
2. Why did you have such a large percent difference in the resistance of the lamp filament with the two different applied voltages? What physical condition of a conductor must remain constant for Ohm's law to apply?
A rectangular copper strip 1.5 cm wide, 0.1 cm thick carries a current of 5 A. A 1.2 T magnetic field is applied perpendicularly to the strip. Find the Hall voltage that should be produced
The Earth is showered with particles from space known as muons. They have a charge identical to that of an electron but are many times heavier (m = 1.88 · 10?28 kg). Suppose a strong magnetic field is established in a lab (B = 0.62 T) and a muon ente..
Two radio-frequency point sources separated by 2.0 m are radiating in phase with ? = 1.00 m. find how many maxima it detects
A 4.00 kg mass is connected by a light cord to a 3.00 kg mass on a smooth surface. The pulley rotates about a frictionless axle and has a moment of inertia of .5 kg m2 and a radius of .30 m.
The length of a steel bar increases by 0.039 % when itstemperature is increased from 0o C to 35o C. Calculate the temperature coefficient of linear expansion for thisbar. (Round the answer to three significant figures.)
A river flows due south with a speed of 1.6m/s. A man steers a motorboat across the river; his velocity relative to the water is 4.6m/s due east. What is the direction of his velocity relative to the earth
The outside mirror on the passenger side of a car is convex and hasa focal length of -7.6 m. Relative to thismirror, a truck traveling in the rear has an object distance of 16 m.
A sled of mass m is pushed for 5 seconds at a constant force. A sled of mass M (more) is also pushed for 5 seconds. What is the energy of each sled
The length of a simple pendulum is 0.87 m and the mass of the particle (the "bob") at the end of the cable is 0.21 kg. What is the angular frequency of the motion
Three charges, +q, +2q, and +4q, are linked by strings (Assume that the middle charge is fixed in space and the other 2 charges are held there by the tension alone.)
A transformer connected to a 100 V (rms) ac line is to supply 8.0 V (rms) to a portable electronic device. What rms current must the secondary supply
Using Newton's Version of Kepler's Third Law II Calculate the orbital period of the Space Shuttle in an orbit 200 above Earth's surface. Express your answer using two significant figures. T= s
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