Which of the following statements about various stages of core nuclear burning (hydrogen, helium, carbon, and so on) in a high-mass star is not true?
A) Each successive stage creates an element with a higher atomic number and atomic mass number.
B) As each stage ends, the reactions that occurred in previous stages continue in shells around the core.
C) Each successive stage lasts for approximately the same amount of time.
D) As each stage ends, the core shrinks and heats further.
C
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A meson is a subatomic “particle” consisting of a quark–antiquark pair. Suppose we have a meson consisting of an up quark and a much more massive bottom antiquark. The interaction between these point-like quarks is purely attractive, like that between oppositely charged particles. Which of the idealized models in this chapter might best describe this system’s possible energy values?
A. The quanton in a box model B. The Bohr model C. The simple harmonic oscillator model
Shear Modulus: The base of a metal block, which is fixed in place, measures 90 cm by 90 cm, and the height of the block is 60 cm. A force, applied to the upper face and parallel to it, produces a shear strain of 0.0060. The shear modulus of this metal is 3.0 × 1010 Pa. The shear stress on the block in megapascals is closest to
A. 180 MPa. B. 360 MPa. C. 600 MPa. D. 720 MPa. E. 900 MPa.
Pressure in a Liquid: A cubical block of stone is lowered at a steady rate into the ocean by a crane, always keeping the top and bottom faces horizontal. Which one of the following graphs best describes the gauge pressure p on the bottom of this block as a function of time t if the block just enters the water at time t = 0 s?
A. 
B. 
C. 
D. 
E. 
A body is oscillating up and down at the end of a spring. Let's consider when the body is at the top of its up and down motion The displacement vector from the equilibrium position points up
Indicate whether the statement is true or false