A 19th century lab technician is testing possible metals for bulb filaments. A tantalum filament with a surface area of 0.370 mm2 and an emissivity of 0.965 radiates 0.80 W of light. Determine the filament's temperature (in K). The melting point for tantalum is 3269 K.
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Physics, 21.06.2019 22:30
What is the earliest point in the universe that we can observe? why can’t we see back further than this?
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Physics, 22.06.2019 04:30
Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?
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Physics, 22.06.2019 15:10
Auniform crate c with mass mc is being transported to the left by a forklift with a constant speed v1. what is the magnitude of the angular momentum of the crate about point a, that is, the point of contact between the front tire of the forklift and the ground
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Physics, 22.06.2019 21:30
Atoaster oven has a resistive heating element. the average rate at which it dissipates energy as thermal energy is 1.00 \(\rm kw\). in the united states, emf amplitude in household circuits is \(\mathcal e_{\max}\) = 170 \({\rm \; v}\) and the \(\rm ac\) oscillation rate is 60 \(\rm hz\). part a what is the root-mean-square current through the heating element?
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A 19th century lab technician is testing possible metals for bulb filaments. A tantalum filament wit...
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