How many km/hr is 30 m/s?

Fyi, this is the chemistry section so

convert each
30 meters per second
kilometers per  hour

1000 meters=1 kilometers

60 seconds=1 hour so
30 meters=30/1000 kilometers=3/100=0.03 kilomiters

1 second=1/60 hours
0.03/(1/60)
make the bottom =1
multiply the whole fraction by (60/1)/(60/1)
1.8/(60/60)=1.8/1=1.8km/1h

the answer is 1.8km/h

False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other