A company that produces pulsed gas heaters claims their efficiency is approximately 90%. If an engine operates between 250°C and 25°C, what is its maximum thermodynamic efficiency?
a. 83%
b. 65%
c. 43%
d. 90%
e. 56%
C
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Within the Northern Hemisphere, the vernal equinox marks the start of ____
a. winter b. fall c. summer d. spring e. a new year
A heat map is an analytical tool that uses color to represent data.
Answer the following statement true (T) or false (F)
Dr. Chuck projects a ball horizontally from a lab bench. The ball lands on a bullseye marked on the floor a horizontal distance away
Compared to the time for the ball to simply drop vertically from the bench, the time in the air for Dr. Chuck's projected ball is A) less. B) the same. C) greater.
Exoplanetary systems containing "hot Jupiters"—extremely massive planets orbiting very close to their parent stars—do not look like our own solar system. Are they inconsistent with the condensation theory of solar system formation? Explain
What will be an ideal response?