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1. What is the fractional change in the resistance of an iron filament when its temperature changes from 0oC to 100oC ?
2. A 20 mF capacitor is charged by a 5.0 V battery through a resistance R. The capacitor reaches a potential difference of 4.0 V in a time 3.0 s after charging begins. Find R.
Two boats start together and race across a 72 km wide lake and back. Boat A goes acrossat 72 km/h and returnsat 72 km/h. Boat B goesacross at 36 km/h, and itscrew, realizing how far behind it is getting, returnsat 108 km/h.
Water is flowing at 4.00 m/s in a horizontal pipe under a pressure of 225 kPa. The pipe narrows to half its original diameter. Assume laminar non-viscous flow. What is the pressure in the narrow section
What are the three longest wavelengths for standing waves on a 237--long string that is fixed at both ends, what is the frequency of the third-longest wavelength
A symmetric concave lens is made of material of refractive index n=1.50 and radii of curvature |r|=20 cm. Determine the image distance and image height by making measurements on your diagram
A parallel-plate capacitor has a capacitance of 10 mF and charged with a 20 V power supply. The power supply is then removed and a dielectric of dielectric constant 4 is used to fill the space between the plates. The energy now stored by the capac..
A standing wave on a string fixed at both ends has three antinodes. The string is 85.0 cm long. What is the wavelength of this standing wave
A helicopter rises vertically with a constant upward acceleration of 0.38 m/s^2. How soon does the wrench hit the ground
An electron has an initial velocity of 5.00 106 m/s in a uniform 3.00 105 N/C strength electric field. How far does the electron travel before coming to rest
An RL circuit with L = 1.00 H and an RC circuit with C = 4.00 µF have the same time constant. What is this common time constant
A space probe journeys at a constant velocity from Earth to star at 22 y in a time of 4 y as measured by the probe's internal clock. How long did the trip take according to clocks on Earth
In order to manufacture these coffee tables, the company would need to incur $525,000 in fixed costs for new equipment. Calculate the break-even point of the coffee tables in units sold. Illustrate what would be the total revenue at the break-even po..
A dad pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 18 rpm, in 13.0 s. What force is required at the edge
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