Because they all involve formation of iron in cores of massive stars, all type II supernovae are equally luminous
Indicate whether the statement is true or false
FALSE
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Your friend says that any radio wave travels appreciably faster than any sound wave
A) agree with your friend unconditionally B) agree with your friend for most common cases C) disagree with your friend D) find a new friend
Planet Z-34 has a mass equal to one-third that of Earth and a radius equal to one-third that of Earth. With g representing, as usual, the free-fall acceleration at the surface of Earth, the free-fall acceleration at the surface of Z-34 is
A) g/3. B) 3g. C) 6g. D) g/9. E) 9g.
Light is totally absorbed when sent through two polaroid filters if their transmission axes are __________
Fill in the blank(s) with correct word
For the ion He+, what is the energy of the ground state?
A. -13.6 eV B. -27.2 eV C. -54.4 eV D. -6.80 eV E. -3.40 eV