What do these two changes have in common?
sediment settling to the bottom of a muddy puddle
a puddle freezing into ice on a cold night
Select all that apply.
Both are chemical changes.
Both are changes of state.
Both are caused by heating.
Both are only physical changes.

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Explanation:

Total distance of covered by Chanice is 12  km

8.60  km was her displacement in the direction of north-east.

Explanation:

Distance covered by Chanice in north direction = 7 km

Distance covered by Chanice in an east direction = 5 km

Total distance of covered by Chanice = 7 km+ 5 km = 12  km

Displacement is defined as shortest distance from initial point to final point.

In a ΔABC, the displacement  of the Chanice = AC

ΔABC, is  a right angled triangle.So, by applying Pythagoras theorem we can determine the the length of AC.

AC = 8.60 km

8.60  km was her displacement in the direction of north-east.