Hot cider is poured into a metal cup. Shortly thereafter the handle of the cup becomes hot. This is due to the process of
A. conduction.
B. radiation.
C. convection.
D. It will remain the same if the work done exceeds the heat added.
Answer: A
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Which ray diagrams are correct? The three rays in each diagram are distinguished by different types of lines. Hint: Check the behavior of each ray as it interacts with the lens.
A. B and C B. C and D C. D and E D. C and E E. C, D and E
A helicopter is flying horizontally with a speed of 444 m/s over a hill that slopes upward with a 2% grade (that is, the "rise" is 2% of the "run")
What is the component of the helicopter's velocity perpendicular to the sloping surface of the hill? A) 8.9 m/s B) 220 m/s C) 435 m/s D) 444 m/s
The scientist first credited for discovering the concept of inertia was
A) Aristotle. B) Galileo. C) Newton. D) Copernicus.
In a steam engine, steam at 140°C in a turbine does work on an external system, and the steam leaves the turbine at 100°C. The efficiency of the steam engine is 5%. The relevant physical principle is the __________ law of thermodynamics
Fill in the blank(s) with correct word