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1. Estimate at what temprature copper will have the same resistivity as tungsten does at 20 degrees celsius.
2. A 100 W light bulb has a resistance of about 12 ohms when cold (20 degrees C) and 140 ohms when hot. Estimate the temperature of the filament when "on" assuming an average temperature coefficient of resistivity = 0.0060 (Celsius)^-1.
The work function for potassium is 2.24 eV. If potassium metal is illuminated with light of wavelength 300 nm
you have fixed costs of $608,000 per year. Your tax rate is 31 percent and your required return on this project is 11 percent. Illustrate what bid price per stamp should you submit?
A 2.6-kg sphere of radius 35 cm is initially rolling on a flat surface with a speed of v = 0.40 m/s. Determine the force F and the distance l
Megan is sitting (at rest) at the top of a slide that is inclined 25o with respect to the horizontal. how much does the thermal energy of the system increase during Megan's trip down the slide
A particle is moving in a simple harmonic oscillator potential U(x)=(1/2)kx^2, Calculate the allowed wave functions and corresponding energies
Two snowballs are moving directly toward each other along a vertical axis. Just before the snowballs collide, Draw a before and after picture of the collision
A child's toy consists of a m = 26 g monkey suspended from a spring of negligible mass and spring constant k. calculate the speed of the monkey in Ve m/s as it passes through equilibrium
Two students stand opposite each other on the rim of the merry-go-round of 6m diameter and rotating at 12 rev/minute. Calculate the coriolis force on the ball
Two lenses that are 35 cm apart are used to form an image. Lens 1 is diverging and has a focal length of f1= -7.0 cm; Use a ray diagram to find the approximate location of the final image
The lower weight is a light bag filled with sand. Assume a pin pokes a hole in the bag and the sand slowly leaks out while the puck is revolving. What would be the puck's speed after all of the sand is gone.
A hydrometer is used to measure the specific gravity of liquids. For a sure liquid a hydrometer reading indicates a specific gravity of 1.15. What is the liquid's density and specific weight? State the answer in SI units.
1.using the information given above calculate the optimum tails assay. plot the cost of fuel as a function of tails
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