A Carnot cycle consists of
A) four adiabats.
B) two adiabats and two isotherms.
C) two isobars and two isotherms.
D) two adiabats and two isobars.
E) four isotherms.
B
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Which of these stars lies closest to the north celestial pole on the celestial sphere?
A) Deneb B) Alpha Centauri C) Spica D) Sirius
A "GUT" (grand unified theory) refers to theories that
A) unify gravity with the strong and weak forces. B) unify the electromagnetic and weak forces. C) unify all four forces together. D) unify the strong force with the electromagnetic and weak forces.
Rotational Dynamics: A uniform solid cylinder of mass 10 kg can rotate about a frictionless axle through its center O, as shown in the cross-sectional view in the figure. A rope wrapped around the outer radius R1 = 1.0 m exerts a force of magnitude F1 = 5.0 N to the right. A second rope wrapped around another section of radius R2 = 0.50 m exerts a force of magnitude F2 = 6.0 N downward. What is the angular acceleration of the cylinder?
A. 1.0 rad/s2 B. 0.60 rad/s2 C. 0.40 rad/s2 D. 0.80 rad/s2
Describe some of the features of Mercury's surface and briefly explain how these features are believed to have formed
What will be an ideal response?