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A standard 100 W (120 V) lightbulb contains a 7.70cm-long tungsten filament. The high-temperature resistivity of tungsten is 9.0×10?7?m.
What is the diameter of the filament?
A conveyer belt with an incline of 10 degrees, is designed to load gravel into the center of a truck bed located 9 feet away from the end of the belt, Determine the velocity of the belt
A 290 g piece of iron at 180 oC is placed in a 95 g aluminum calorimeter cup containing 250 g of glycerin at 10 oC. What is the specific heat of glycerin
A toy cannon uses a spring to project a 5.34 g soft rubber ball. The spring is originally compressed by 5.09 cm and has a force constant of 7.98 N/m. With what speed does the projectile leave the barrel of the cannon
The equation of a transverse wave traveling on a string is given by y = A sin(kx - ?t) . Data: A=11 mm, k=73 rad/m, ?= 280 rad/s. What is the amplitude? What is the frequency? What is the wave velocity? What is the wavelength? For the same wave, f..
an insulated container is filled with a mix of 400 g of water at 20 C and 60 g of ice at 0 C. assuming negligible heat is exchanged with the container, what is the temperature of the mixture when it reaches thermal equilibrium.
On an essentially frictionless horizontal ice-skating rink, a skater moving at 3.1m/s encounters a rough patch that reduces her speed by 42% to a friction force that is 24% of her weight
A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N, determine the person's power output
Find the magnitude of , the acceleration of the car after the brakes are applied. Express your answer in terms of some or all of the variables d, t, and v.
Unpolarized light is shone on a stack of 3 polarizers, What fraction of the initial intensity emerges from the stack
A clock has a second hand whose tip rubs against the inside of the glass cover. what is the minimum torque that must be applied to the second hand
In the days of horse-drawn wagons, iron tires used to be placed on wooden wagon wheels by heating the iron rims, what diameter will the tire have when it is heated to 680 oC
A very thin sheet of glass (n=1.5) floats on the surface of water (n=1.33). When illuminated with white light at normal incidence, What is the thickness of the glass
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