Descartes' hypothesis of solar system formation was problematic because he did not understand the ____
a. involvement of condensation
b. involvement of contraction
c. difference in the planets
d. involvement of gravity
e. gaseous properties of the Sun
d
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In an ionic material, the ______________potential is the attractive energy between ions.
Fill in the blank(s) with the appropriate word(s).
A proton moving at 3 × 104 m/s is projected at an angle of 30° above a horizontal plane. If an electric field of 400 N/C is directed downwards, how long does it take the proton to return to the horizontal plane? (HINT: Ignore gravity.) [mProton = 1.67 × 10?27 kg, qProton = +1.6 × 10?19 C.]
What will be an ideal response?
A 10-N falling object encounters 10 N of air resistance. The net force on it is
A) 0 N. B) 4 N. C) 6 N. D) 10 N.
The number of nucleons in a nucleus is the same as the number of neutrons plus the number of ______________
Fill in the blank(s) with correct word