Question

Hello I need help At a certain temperature, the speed of sound in the air is 330 meters per second.

Which of the following expressions would convert this speed into kilometers per second?

Answer 1

Answer:

Firstly, we are told that the value we are supposed to convert is "330 meters per second." When we see the word "per," we know that the unit should be divided.

So, really, the value is:

$330\ \frac{meters}{second}$

Which can be abbreviated to:

$\frac{330\ m}{1\ sec}$

We can scratch off the last two answers because they involve an x, and that is not our given value.

We can also eliminate the second answer because we are supposed to convert to kilometers, which is abbreviated by "km."

So, the answer is A or:

$(\frac{330\ m}{1\ sec})(\frac{1\ km}{1000\ m})$

Answer 2

The equivalent expression is $(a)\ \frac{330m}{sec} \times \frac{1\ km}{1000\ m}$

Speed

Speed is the rate of change of distance over time

The speed in meter per second is given as:

$Speed =330m/sec$

Equivalent expression

To convert from meters to kilometers, we simply multiply the distance by 0.001.

So, we have:

$Speed =\frac{330m}{sec} \times 0.001$

Express 0.001 as 1/1000

$Speed =\frac{330m}{sec} \times \frac{1}{1000}$

Rewrite as:

$Speed =\frac{330m}{sec} \times \frac{1\ km}{1000\ m}$

Hence, the equivalent expression is $(a)\ \frac{330m}{sec} \times \frac{1\ km}{1000\ m}$

Read more about equivalent expressions at:

https://brainly.com/question/2972832