In most cases, what happens to a liquid when it cools?
1 answer:
Answer:
Option (A) and (F)
Explanation:
As the liquid cools down, it means the temperature decreases the density of the liquid increases in most o the cases.
Now the volume is inversely proportional to the density of substance so density increases.
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4m. The big travels 2m twice
D ............................
Answer:
308 N-s
Explanation:
Momentum is given by
P= mv
P= 77 x 4
P= 308
Total distance = 76+54 = 130km
total time = 2+5 = 7hrs
Av. speed = 130/7 = 18.571km/hr = 18.6 km/h ( 3 sig fig)