The lowest energy level in an atom is its
a. ionization level.
b. emission level.
c. absorption level.
d. photon level.
e. ground state.
e
Physics & Space Science
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What do you call the first day of spring?
A. Vernal Equinox B. Solstice C. New Moon D. June 21 E. Autumn
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Dana uses a rope to pull a box that weighs 600 N across a level surface with constant velocity. The rope makes an angle of 40° above the horizontal and the tension in the rope is 400 N. What is the coefficient of friction?
a. 0.89 b. 0.88 c. 2.00 d. 1.19 e. 0.84
Physics & Space Science
How important is studying projectile to once life?
What will be an ideal response?
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If a nuclide has a half-life of 100 s, what is the corresponding mean lifetime?
A. 100 s B. 144 s C. 69 s D. 50 s E. 75 s
Physics & Space Science