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diamong [38]
3 years ago
9

A cruise ship is moving at constant speed through the water. The vacationers on the ship are eager to arrive at their next desti

nation. They decide to try to speed up the cruise ship by gathering at the bow (the front) and running together toward the stern (the back) of the ship.
(i) While they are running toward the stern, the speed of the ship is:_______.
1. higher than it was before.
2. unchanged.
3. lower than it was before.
4. impossible to determine.
(ii) The vacationers stop running when they reach the stern of the ship. After they have all stopped running, is the speed of the ship
(a) higher than it was before they started running,
(b) unchanged from what it was before they started running,
(c) lower than it was before they started running,
(d) impossible to determine?
Physics
1 answer:
finlep [7]3 years ago
7 0

A

Explanation:

bcz its A so ya i had this on my science hw

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Arrange the following substances in order of decreasing magnitude of lattice energy.
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The formula is F = ( q1 * q2 ) / r ^ 2 
<span>where: q is the individual charges of each ion </span>
<span>r is the distance between the nuclei </span>
<span>The formula is not important but to explain the relationship between the atoms in the compounds and their lattice energy. </span>

<span>From the formula we can first conclude that compounds of ions with greater charges will have a greater lattice energy. This is a direct relationship. </span>
<span>For example, the compounds BaO and SrO, whose ions' charges are ( + 2 ) and ( - 2 ) respectively for each, will have greater lattice energies that the compounds NaF and KCl, whose ions' charges are ( + 1 ) and ( - 1 ) respectively for each. </span>

<span>So Far: ( BaO and SrO ) > ( NaF and KCl ) </span>

<span>The second part required you find the relative distance between the atoms of the compounds. Really, the lattice energy is stronger with smaller atoms, an indirect relationship. </span>
<span>For example, in NaF the ions are smaller than the ions in KCl so it has a greater lattice energy. Because Sr is smaller than Ba, SrO has a greater lattice energy than BaO. </span>

<span>Therefore: </span>
<span>Answer: SrO > BaO > NaF > KCl </span>
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