What is the carnot cycle?
Ans:
it is a cyclic process carried out in a piston, where heat is converted into work or work is converted into heat
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Stars less massive than 0.4 solar mass never become giant stars
a. True b. False Indicate whether the statement is true or false
An object 1.25 cm tall is placed 100 cm in front of a convex lens with a focal length of magnitude 50 cm. A concave lens with a focal length of magnitude 20 cm is placed 90 cm beyond the first lens
Where is the final image located? A) 10 cm in front of the second lens B) 20 cm past the second lens C) 17 cm past the second lens D) 10 cm past the second lens E) 20 cm in front of the second lens
Most active galactic nuclei are at large distances from us; relatively few nearby galaxies harbor active galactic nuclei. What does this imply?
A) Massive black holes existed only when the universe was young and no longer exist today. B) Active galactic nuclei tend to become less active as they age. C) The jets seen in many active galactic nuclei must cause them to move far away from us. D) Active galactic nuclei can form only at large distances from the Milky Way.
The San Andreas fault in California is thought to be a boundary of two plates
a. that are separating from one another. b. where one is pushing over the top of the other. c. that are sliding horizontally past one another. d. that are basically at rest.