_____ is the location in the H-R diagram where stars first reach stability as hydrogen-burning stars

A) The proton-proton chain
B) The carbon-nitrogen-oxygen cycle
C) The zero-age main sequence
D) The interstellar medium region


C

Physics & Space Science

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Aerodynamic lift results from ________ Principle.

What will be an ideal response?

Physics & Space Science

A steel bracket ABCD (EI 5 4.2 3 106 N # m2), with span length L 5 4.5 m and dimension a 5 2 m, is subjected to load P 5 10 kN at D. The maximum deflection at B is approximately:


(A) 10 mm
(B) 14 mm
(C) 19 mm
(D) 24 mm

Physics & Space Science

If the energy of n = 6 is –0.378 eV and that of n = 4 is –0.850 eV in a hydrogen atom, a transition from n = 6 to n = 4 will emit a photon of what energy?

Physics & Space Science

If the energy levels in the neon atom were not discrete, neon signs would glow

A) red. B) white. C) blue.

Physics & Space Science