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A hair dryer has a power rating of 1400 W at 110 V rms. Assume the hair dryer circuit contains only resistance.
(a) What is the resistance of the heating element?
____?
(b) What is the rms current drawn by the hair dryer?
_____ A
(c) What is the maximum instantaneous power that the resistance must withstand?
_____kW
Establish the temperature at the interface
You take the elevator to the roof of midtown skyscraper that is 100 meters high. What was the velocity of your souvenir just before it hit the ground
An object of mass 5kg is moving with an momentum of 50 kg m/s. What is the speed of the object? What is the magnitude of the momentum of the object
Light of wavelength 588 nm falls on a double slit. First-order bright bands appear 3.65 cm from the central bright band. The screen is 1.20 m from the slits. How far apart are the slits.
You are given a galvanometer with a resistance of 17.3 ? and a full scale deflection current of 8.42 mA. Find the maximum current the ammeter is capable of reading
The string changes from horizontal to vertical as it passes over a solid pulley of diameter 6.0cm. The pulley is free to turn on a fixed smooth axle. The vertical section of the string supports a 400 g object. The string does not slip at its conta..
A guitar string is 90 cm long and has a mass of 3.8g. What are the frequencies of the fundamental and first two overtones
Two masses are placed on an airtrack and given initial velocities towards each other. Calculate the impulse acting on mass one during the collision
It eventually launches horizontally off of the table and takes the path of a projectile until it hits the ground 40 centimeters from the edge of the table.
how long does it take the engine to lift the crate a vertical distance of 19.8 m? Friction in the system is negligible.
A 500? resistor and a 240mH inductor are connected in series with an ac generator with an rms voltage of 17.0V, compute the rms current in this circuit
A person exerts a force of 120N on a rope that pulls a sled across a very smooth surface. The rope is oriented 37 degrees above the horizontal. Determine the speed of the sled after moving for 10 m
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