Question
In: Physics
A particular make of light bulb contains argon at 50 Torr and has a tungsten filament...
A particular make of light bulb contains argon at 50 Torr and has a tungsten filament of radius 0.10mm and length 5.0cm. When operating, the gas close to the filament has a temperature of about 1000°C. How many collisions are made with the filament in each second.
Solutions
genius_generous answered 4 months agoRelated Solutions
An incandescent light bulb uses a coiled filament of tungsten that is 580 mm long with...
An incandescent light bulb uses a coiled filament of tungsten
that is 580 mm long with a diameter of 46.0 μm. At 20.0∘C tungsten
has a resistivity of 5.25×10−8Ω⋅m. Its temperature coefficient of
resistivity is 0.0045 (C∘)−1, and this remains accurate even at
high temperatures. The temperature of the filament increases
linearly with current, from 20∘C when no current flows to 2520∘C at
1.00 A of current. What is the resistance of the light bulb at
20∘C? What is the...
A 100-W incandescent light bulb has a cylindrical tungsten filament 26.0 cm long, 0.35 mm in...
A 100-W incandescent light bulb has a cylindrical tungsten
filament 26.0 cm long, 0.35 mm in diameter, and with an emissivity
of 0.28.
(A) What is the temperature of the filament?
(B) For what wavelength does the spectral emittance of the bulb
peak?
(C) Incandescent light bulbs are not very efficient sources of
visible light. Explain why this is so.
A sample of argon gas contained in a light bulb has a pressure of 1.20 atm...
A sample of argon gas contained in a light bulb has a pressure
of 1.20 atm at 18oC. What is the pressure (mmHg) of the Ar gas when
it is heated to 85 oC at constant volume?
The length of a 60 W, 240 Ω light bulb filament is 60 cm.
The length of a 60 W, 240 Ω light bulb filament is 60 cm.
1.) Remembering that the current in the filament is proportional to the electric field, what is the current in the filament following the doubling of its length?
Express your answer using two significant figures.
2.) What is the resistance of the filament following the doubling of its length?
Express your answer using two significant figures.
Calculate the rate of energy emitted from an incandescent tungsten halogen light bulb as a function...
Calculate the rate of energy emitted from an
incandescent tungsten halogen light bulb as a function of
wavelength (W/m2 per µm versus wavelength in µm). Assume the
tungsten filament has a temperature of 3300 K.
c. What fraction of the total energy emitted by the bulb
produces light that we can see and what fraction is wasted as heat
(λ > 800 nm)?
d. Compare total area under your emissive power plot to
theoretical area. Given the total power emitted...
A circuit contains a 120V battery, and a single light bulb whose resistance is 240 Ω....
A circuit contains a 120V battery, and a single light bulb whose
resistance is 240 Ω.
(A) Determine the power dissipated by the single bulb. Assume 5
additional bulbs, all identical to the first bulb are placed in
parallel with each other and the first bulb.
(B) Determine the power dissipated by each bulb.
(C) If a 6.00 A circuit breaker (CB) is placed in series with
the battery in the circuit with the parallel bulbs, will the CB
trip...
A light fixture contains five lightbulbs. The lifetime of each bulb is exponentially distributed with mean...
A light fixture contains five lightbulbs. The lifetime of each
bulb is exponentially distributed with mean 196 hours. Whenever a
bulb burns out, it is replaced. Let T be the time of the first bulb
replacement. Let Xi, i = 1, . . . , 5, be the lifetimes of the five
bulbs. Assume the lifetimes of the bulbs are independent.
a.
Find P(X1 > 100).
b.
Find P(X1 > 100 and X2 > 100 and • • • and...
A light fixture contains five lightbulbs. The lifetime of each bulb is exponentially distributed with mean...
A light fixture contains five lightbulbs. The lifetime of each
bulb is exponentially distributed with mean 205 hours. Whenever a
bulb burns out, it is replaced. Let T be the time of the
first bulb replacement. Let XiXi , i = 1, . . . ,
5, be the lifetimes of the five bulbs. Assume the lifetimes of the
bulbs are independent.
1-Find P( X1X1 > 100).
2-Find P( X1X1 > 100 and X2X2 > 100
and • • • and...
A metallurgist has invented a new tungsten alloy for use in the filaments of light bulbs...
A metallurgist has invented a new tungsten alloy for use
in the filaments of light bulbs that is supposed to burn brighter
with the use of less energy. A company investigates the potential
costs of producing the new type of bulb and decides that production
would be economically feasible if the bulbs would last an average
of longer than 2000 hours in continuous usage. Twenty-five of the
new bulbs are tested and found to last an average of 2240 hours...
a) A light bulb has a resistance of 5.0 Ω and a current of 0.4 A...
a) A light bulb has a resistance of 5.0 Ω and a current of 0.4 A
when it is connected to a voltage. At what voltage is it operating?
(Express your answer to two significant figures.)
b) A piece of copper wire is 1.00 m long and has a diameter of
2.00 mm. Copper has a resistivity of 1.725⋅10−8Ω1.725⋅10−8Ω
Calculate the resistance of this piece of copper wire.
(Express your answer to three significant figures.)
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