Answer:
40m (40m east)
Explanation:
The fist move is 70m east, and east is the positive direction so the truck initially is at +70m.
The second move is 120m to the west, since east is the positive direction, west must be the negative direction, this means the truck now is at:

The third move is 90m to the east, again, this is the positive direction, so the new position is:

The truck is at + 40m, so it ended up 40m away from its initial position and this is the resultant dispacement.
Answer:
3kg
Explanation:
impulse = MV
then
m1v1=m2v2
when the values are subtitude
then
m2=1.2*25/10
m2=<em>3</em><em>0</em><em>k</em><em>g</em><em>/</em><em>/</em>
Answer: white
Explanation:
prisms separate white light, such as that from the sun by wavelength.
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