When an object is inside the focal point of a concave mirror, a(n) ______________ image always results

Fill in the blank(s) with correct word

virtual

Physics & Space Science

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In the Drake equation, Nc = N* × fp × nHZ × fL × fI × fs, the factor nHZ is:

A) the average number of planets in a solar system. B) the average number of stars that have planets. C) the average number of planets where life evolved to intelligence. D) the average number of planets in each solar system suitably placed in the habitable zone.

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Physics & Space Science

How much energy is radiated each second by one square meter of a star whose temperature is 10,000 K? s in the Stefan-Boltzmann law is equal to

,

a. 5.67 x 1012 J
b. 5.67 x 108 J
c. 5.67 x 104 J
d. 300 nm
e. 300,000,000 nm

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Physics & Space Science

Is it possible for the gravitational potential energy of an object to be negative?

A. Yes B. No

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Physics & Space Science

Which of the following statements is true about the spin-orbit coupling effects on the transitions of an atom such as sodium? Assume sodium is modeled by a single electron atom

a.The difference in the energy of a split state does not depend on the electron's angular momentum, but instead the angular momentum of the nucleus. b. The differences in energy level transitions are significant enough to change the order of filling of the subshells. c.Electrons with a state of l = 0 never have split energy levels. d. For single electron atoms (or atoms with one electron outside a filled shell) each nl state is made a doublet.

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Physics & Space Science