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A common flashlight bulb is rated at 0.300 A and 3.00 V (the values of the current and voltage under operating conditions). If the resistance of the bulb filament at room temperature (20°C) is 2.60 ?, what is the temperature of the filament when the bulb is on? The filament is made of tungsten.
A wheel of radius 2m (I=MR^2) has a rotational kinetic energy of 4800 J when rotating at 20 rev/s. What is the final angular speed of the system
The nonconducting spherical shell is replaced with a thin metal spherical shell of diameter 8 cm and a charge of 1.00, What is the net electric field at 50 cm on the positive x axis
A skier starts from rest at the top of a hill that is inclined at 10.2° with the horizontal. The hillside is 150 m long, and the coefficient of friction between snow and skis is 0.0750. At the bottom of the hill, the snow is level and the coefficient..
Calculate the electrostatic force exerted on the point charge by the cylinder and what level of uncertainty would be acceptable in the initial position? You may assume that the uncertainty in all other parameters is negligible
A stuntman sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 10.0 m/s, How long is he in the air
a thin glass (n = 1.50) converging lens for which the radii of curvature are R1 = 15.0 cm and R2 = -12.0 cm. Determine the area of the image
A mortar* crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action, How long will the mortar shell remain in the air
Three dogs are pulling on a blanket in different directions. The English shepherd is pulling north with a force of 40 N. in what direction is the boxer pulling
A 4.50 kg package slides 1.30 m down a long ramp that is inclined at 10.8° below the horizontal. Calculate the total work done on the package
baseball toward home plate at 85 miles per hour with a spin of 1800 revolutions per minute. Explain how many rotations does it make on a path of 60 feet?
Suppose that the net horizontal force is because of rolling friction only and take the free-fall acceleration to be g = 9.80 m/s^2. What is the coefficient of friction for the tire under low pressure.
Two blocks of masses m1=1 kg and m2 =2 kg are connected by a massless cord passing over a massless, frictionless pulley. what are the accelerations of the two masses with respect to the ground
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