Exam (elaborations)
SCS 110 exam 2 (2)
Exam of 2 pages for the course SCS at SCS (SCS 110 exam 2 (2))
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SCS 110 exam 2An engine attains a high temperature of 800°C in the gases are cooled to 90°C during
the exhaust cycle. What is the efficiency of the engine? - ANS-0.66
Benjamin Franklin - ANS-Static charges, lightning rod
Celsius to Kelvin conversion - ANS-K = C + 273.15
Charge symbol - ANS-q
Count Rumford (Benjamin Thompson) - ANS-disproved caloric
Current symbol - ANS-i
Current unit - ANS-Ampere (A)
Electric Energy Equation - ANS-EE= v*i*t or EE= P*t
Good example of a resistor - ANS-Toaster (EE to heat energy)
How many joules is 50 cal of heat energy - ANS-209 Joules
If 120 V is applied to a 60 ohm resistor, what is the current across the resistor - ANS-2.0
A
If a 75 W lightbulb uses 120 V of electricity what is the current that is used - ANS-O.625
A
If star A emitted light at a maximum of 200 nm and star B emitted light at a maximum of
250 nm, which would have the higher surface temperature - ANS-A
If you spend $150 in one month and your rate is $0.08/KWH, how many KWH of energy
did you use that month? - ANS-1875 KWH
James Joule - ANS-showed that heat was another form of energy
James Maxwell - ANS-light has properties of waves
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