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A common flashlight bulb is rated at .3A and 2.9V (the values of the current and voltage under operating conditions). If the resistance of the tungsten bulb filament at room temperature (20 degrees Celsius) is 1.1 ohms, what is the temperature of the filament when the bulb is on?
A 45.0 g ball of copper has a net charge of 2.1 µC. What fraction of the copper's electrons have been removed
A spherical balloon has a radius of 7.5 m, and is filled withhelium. How large a cargo can it lift, assuming that the skin andstructure of the balloon have a mass of 800 kg
A 10-lb block is attached to an unstretched spring of constant k = 12 lb/in. The coefficients of static and kinetic friction between the block and the plane are .6 and .4 respectively.
A horizontal wire of length 0.58 m, carrying a current of 7.2 A, is placed in a uniform external magnetic field, Determine the magnitude of the external magnetic field
Ice at 0 degrees Celsius and at a pressure of 1 atmosphere has a density of 916.23 kg m^-3 while water under these conditions has a density of 999.84 kg m^-3
A consumer upset with the latest trend of postal rate increases has decided to try to send letters by balloon even though they may not reach their intended destination
Cost of electricity varies but typical values are around $0.15/kWh. Using this price, calculate the cost of making a piece of toast in 3.00 min with a 980W toaster
U-tube mounted on wood (each arm is about 22 cm long) • Small glass funnel • Thin rubber sheet (5cm by 5cm) • Tall glass container or beaker about 1000 cu.cm capacity • Standard masses, Observe and record the levels of the colored water in arms A ..
A 1100 kg car carrying four 75 kg people travels over a "washboard" dirt road with corrugations 3.5 m apart. by how much does the car body rise on its suspension
A 0.410 kg pendulum bob passes through the lowest part of its path at a speed of 3.20 m/s. What is the tension in the pendulum cable at this point if the pendulum is 80.0 cm long
A driver travels northbound on a highway at a speed of 28.0 m/s. What frequency does the driver observe as the police car approaches
Some amusement park rides move you back and forth in the horizontal direction. Why is this motion so much more disturbing to your body than cruising at a high speed in a jet airplane.
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