Exam (elaborations)
PHYS 143 Quiz Questions And Answers Latest Update
- Course
- PHYS 143
- Institution
- University Of Illinois - Urbana-Champaign
PHYS 143 Quiz Questions And Answers Latest Update
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PHYS 143 Quiz Questions AndAnswers Latest Update
Smart rocks are considered for ANS✔✔ Ballistic missile defense
Kinetic energy can be measured in ANS✔✔ calories
Electricity from the wall plug costs ANS✔✔ 10 cents per kWh
Which is the least expensive for the same energy delivered? ANS✔✔ coal;
compared to gasoline, AA batteries, and natural gas
The efficiency of a cheap solar panel is close to ANS✔✔ 12%
Solar power is about ANS✔✔ 1kW per square meter; 1gigawatt per square
km
One watt is equivalent to ANS✔✔ one joule per second
The average temp of the Earth including the poles and equator is now
ANS✔✔ 57F
Which country emits the most CO2 per person ANS✔✔ US
, The greenhouse effect involves the atmospheric emission of ANS✔✔ IR
During the past 100 years or so the amount of CO2 in the atmosphere has
ANS✔✔ increased by about 35%
Which country emits the most CO2 ANS✔✔ China
Stimulated emission is important for ANS✔✔ lasers
Xerox machines make use of ANS✔✔ photoelectric effect
Quantum computers are ANS✔✔ not yet useful for anything
Quanta are not observed in water waves because ANS✔✔ the energy of
quanta are too small
A laser operates on the principle of ANS✔✔ photon avalanche
Jim and Mary both drive to Dallas from Houston. Jim drives at 60mph. Mary
drives at 70mph. When they meet up in Dallas, who has aged the most?
ANS✔✔ Jim
Which is the most accurate equation for energy? ANS✔✔ E=mc^2
The effects of relativity must be taken into account for ANS✔✔ GPS
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