Iknow this isn't a math question, but i have received no answers in the chemistry section of this site. can anyone in here with this question? i cannot find the answer to this anywhere in my chem book: what is the major difference between the two-dimensional and three- dimensional models of ethane and methane? when might you choose to use a two-dimensional model rather than a three-dimensional model when representing one of the molecules?

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step-by-step explanation:

because i said it is

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.