Measure if how far an object has moved.

1 answer:

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You can't really measure how far an object has moved. If you weren't
watching it the whole time, you can only measure how far it <em>IS</em> now from
where it started, but you don't know what route it traveled to get there.

The distance between where it started and where it ended up is called
the object's "displacement". That's the length of the straight line between
those two points. And it's also the shortest possible distance the object
could have moved in order to get to where it is now.

Funny thing: When you walk all the way around a yard, a track, or a building,
or drive a car one lap around the track, your <em>displacement</em> is zero, because
you end up in the same place you started from, and the distance is zero.
If somebody saw you before and after, but didn't see you walk or drive,
they wouldn't know that you had moved at all.

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When a solid is placed in a container and heat is applied, a phase change occurs. Watch the video and identify which of the foll

goldenfox [79]

Answer:

a) false b) true c) true d) false and e) true

Explanation:

a) false. All the energy applied is used for the phase change, so the temperature remains constant.

b) true. The kinetic energy is associated with the speed of the particles and they have more mobility in the liquid, therefore, more kinetic energy.

c) true. Since energy is used for state change

d) false. In general, mobility and temperature are proportional

e) true. Heat is the source of energy for the change of state

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