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The current in a 100 watt light bulb is 0.760 Amp. The filament inside the bulb is 0.290 millimeter in diameter. Calculate the current density in the filament? in A/m^2.
The voltage and power ratings of a particular light bulb, which are its normal operating values, are 110 V and 60 W. what is the actual power drawn by the bulb
A 1.20-kg block of wood sits at the edge of a table, 0.782 m above the floor. What horizontal distance does the block cover before hitting the ground
Two identical particles of mass m approach each other at equal and opposite speeds, v. How much kinetic energy was lost in this collision
a rotating flywheel can be used as a method to store energy. if it has 108105j of kinetic energy when rotating at 400
Consider a straight wire with a radius A, carrying a current I, Use Ampere's law to calculate the magnetic field around the wire as a function of r, the distance from the center
A skateboarder shoots off a ramp with a velocity of 6.6 m/s,directed at an angle of 58° above the horizontal. The end ofthe ramp is 1.2 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take a..
Gas in a container is at a pressure of 2.4 atm and a volume of 3.8m3. what is the work done on the gas if it expands at constant pressure to twice its initial volume?
The power crossing a surface perpendicular is equal to the intensity at the surface times the area of the surface. Since the source emits uniformly in all directions, the light intensity is the same at all points on the imaginary spherical surface..
A proton accelerates from rest in a uniform electric ?eld of 677 N/C. At some later time, its speed is 9.4 × 10 5 m/s. how far has it moved in this time interval
the 20-g centrifuge at nasas ames research center in mountain view california is a horizontal cylindrical tube 58 ft
An energetic father stands at the summit of a conical hill as he spins his 22 child around on a 5.3 cart with a 2.2m-long rope. The sides of the hill are inclined at 25 degrees. He keeps the rope parallel to the ground, and friction is negligible.
A hurricane wind blows across a 7.10 15.1 flat roof at a speed of 130. How much force is exerted on the roof
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