What is free-fall acceleration near earth's surface

2 answers:

7 0

<span>Near Earth's surface, the distance between the object that is falling and the center of Earth does not change very much. Thus, the force given by the law of universal gravitation depends only on the mass of the object that is falling.</span>

Oliga [24]3 years ago

4 0

Free fall is when the only force acting on an object is gravity

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Which compounds are lewis acids? select all that apply. (ch3ch2)2hc+ cl3c− ch3nh2 bbr3?

alexandr402 [8]

The Lewis acids are electron pair acceptors due to the availability of vacant orbitals they accept electrons from the donor compounds.

$(CH_3CH_2)_2CH^{+}$ is a Lewis acid due to the unfilled valence shell on carbon atom (possessing positive charge) it accepts electron readily.
$CCl_{3}^{-}$ is not a Lewis acid due to the presence of negative charge which represents that there are electrons available for donation.
$CH_3NH_2$ is not a Lewis acid due to the presence of lone pair on nitrogen which is easily donated to the acceptors.
$BBr_3$ is a Lewis acid due to the availability of vacant p-orbital on boron atom.