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1) The voltage in typical household wiring is 120 V. How much current does a 100 W lightbulb draw? What's the bulb's resistance under these conditions? The filament in the lightbulb has a diameter of 0.050 mm.i) What is the current density in the filament?ii) Compare it with the current density in a 12-gauge wire (diameter 2.1 mm) supplying current to the lightbulb.2) Find the capacitance of a parallel-plate capacitor consisting of circular plates 34 cm in radius separated by 2.0 mm.C=?pF
find the childs speed at the lowest point.An elevator has mass 610 kg, not including passengers. The elevator is designed to ascend, at constant speed, a vertical distance of 20.0 m (five floors) in 17.0 s and it is driven by a motor that can provi..
Unpolarized light of intensity I0 is incident on three polarizing filters. The axis of the first is vertical, that of the second is 36° from vertical, What light intensity emerges from the third filter
The position of a particle is given in cm by x = (5) cos 5?t, where t is in seconds. Find the maximum acceleration of the particle
A pipe carrying 20°C water has a diameter of 3.5 cm. Estimate the maximum flow speed if the flow must be streamline
An undersea research chamber is spherical with an external diameter of 4.60m . The mass of the chamber, when occupied, is 51100kg. What is the buoyant force on the chamber
An air-track glider attached to a spring oscillates between the 11.4 cm mark and the 57.27 cm mark on the track. What is the maximum speed of the glider in cm/s
A fireman d = 59.0 m away from a burning building directs a stream of water from a ground- level fire hose at an angle of ?i = 29.0° above the horizontal, at what speed will the water strike the building
a rectangular air mattress is 2.0 m long, 0.50 m wide, and0.08 m thick. If it has a mass of 2.0 kg, what additional mass can it support in water
1 an antenna is connected to a car battery. will the antenna emit electromagnetic radiation? why or why not? explain.2
What is the largest slit width for which there are no minima when the wavelength of the incident light on the single slit is436nm?
On an unknown planet with radius 1000km a future astronaut drops a rock from his hand 2m off the ground. The rock takes 2s to reach the ground. What speed did the cannon launch the ball
an 8.5 m long wire of resistance 20.6 \(\Omega\) carries a current of 6.6, What is the magnitude of the electric field in the wire
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