For what wavelength does a 100-mW laser beam deliver 1.6 × 1017 photons in one second? (c = 3.0 × 108 m/s, h = 6.626 × 10-34 J ? s)
A) 320 nm B) 340 nm C) 330 nm D) 350 nm
A
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Who headed the project to construct the world's first human-made nuclear reactor?
A) Edward Teller B) Leo Szilard C) Albert Einstein D) Enrico Fermi E) J. Robert Oppenheimer
A ball is pushed downhill with an initial velocity of 3.0 m/s. The ball rolls down a hill with a constant acceleration of 1.6 m/s2 . The ball reaches the bottom of the hill in 6.0 s. What is the ball's velocity at the bottom of the hill?
a. 10 m/s c. 16 m/s b. 13 m/s d. 17 m/s
Recoil is noticeable if we throw a heavy ball while standing on roller skates. If instead we go through the motions of throwing the ball but hold onto it, our net recoil will be
A) zero. B) the same as before. C) small, but noticeable.
The dipole arrow in an S—Se bond would point toward the ______________ atom
Fill in the blank(s) with correct word