A heat engine receives 7000 J of heat and loses 3000 J in each cycle. What is the efficiency of this engine?
A) 30% B) 43% C) 57% D) 70%
C
Physics & Space Science
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According to Wien's displacement law, if the absolute temperature of a radiating blackbody is tripled, then the peak wavelength emitted will change by what factor?
a. 1/3 b. 1 c. 3 d. 9
Physics & Space Science
A spherical mirror has a radius of curvature of 22 cm. If the mirror is concave, its focal length is
A) -11 cm. B) -22 cm. C) 11 cm. D) -44 cm. E) 22 cm.
Physics & Space Science
Pre-main-sequence stars are above and to the right of the main sequence
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
Solar ponds store solar energy
What will be an ideal response?
Physics & Space Science