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A common flashlight bulb is rated at 0.30 Amp and 2.8 Volt (the values of the current and voltage under operating conditions). If the resistance of the bulb filament at room temperature (20 degree Celsius) is 1.1 ohm, Estimate the temperature of filament when the bulb is on? The filament is made of tungsten.
°C
Why is the normal force of an object zero at the top of a hill (such as the hill of a roller coaster)? I'm doing a circular motion unit and I found a few problems where this is the case, and I was wondering how it works.
Most of the blackholes observed by astronomers have masses equal to few solar masses (the result of the death of a high mass star) or have masses equal to several million solar masses. Calculate the Schwarzschild radius of a blackhole
question a transformer has n1 350 turns and n2 2 000 turns. if the input voltage is ?v t 170 v cos wt what rms
q1. helium he a monatomic gas fills a 0.009 m3 container. the pressure of the gas is 6.00 105 pa. how long would a 0.25
the vector position of a particle varies in time according to the expression 5.60 - 6.80 t2 where is in meters and t
A laser used in a holography experiment has an average output power of 4.93 mW. Calculate the energy (in joules) radiated with each pulse
A worker on a scaffolding 65 ft above the ground needs to lift a 390 lb bucket of cement from the ground to a point 30 ft above the ground by pulling on the rope weighting 2 lb/ft . Set up the integral of how much work is required (just give the i..
a 2.30 l sample of neon at 5.35 atm is added to a 10.0 l cylinder that contains argon. if the pressure in the cylinder
Pure silicon is used as a photon detector. An incoming photon canstrike the surface and excite electrons from the valence band tothe conduction band, where they can be counted.
question you wish to create an image that is 10 meters from an object. this image is to be inverted and half the height
An incandescent lightbulb emits 97 W of radiation. If the filament is at a temperature of 2818 K, what is the area of the filament
the potential energy stored in a magnetic field arises becausea of the knestic energy of the moving charges.b of the
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