On a day when the air temperature is 65°F, the wet-bulb reading ofa psychrometer is 61°F. What is the dewpoint?answer________degrees F?
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the circuit shown below is made using identical bulbs and an ideal battery.
a)Which of the following statements is correct? Explain your reasoning for the choices you have made.
Bulb D is brighter than bulb F.
Bulb D is dimmer than bulb F.
Bulbs D and F have the same brightness.
There is not enough information given to compare the brightness of two bulbs.
b)Bulb D in the circuit above is then removed from its socket. (What happens when a bulb is removed? Study the description of a bulb's construction on page 2 of the Electric Circuits I: Current lab if you are unsure.) When bulb D is removed from its socket
the brightness of bulb F would:
- Increase
- Decrease
- Stay the same
- Not enough information
A common flashlight bulb is rated at 0.30 A and 3.5 V (the valuesof the current and voltage under operating conditions). If theresistance of the bulb filament at room temperature (20°C) is 1.0 ,what is the temperature of the filament when the bulb is on? Thefilament is made of tungsten.°C
While taking photographs in Death Valley on a day when thetemperature is 65â¦C, BillHiker ï¬nds that a certain voltage applied to a copper wire producesa current of 1.536 A. Bill then travels to Antarctica and appliesthe same voltage to the same wire. What current does he register inAntarctica if the temperature there is â86â¦C? Assume that no changeoccurs in the wireâs shape and size. The temperature coeï¬cient ofresistivity of copper is 0.0039 (â¦C)â1 for T0 = 20â¦C.Answer in units of A.