A train travels 67 km, north along a straight track in 39 minutes. What is the train's average velocity in kilometers per minutes .

What is one function of the embedded proteins

How can active reading strategies you? o a. they can you get into better physical shape. o b. they can you read fewer science articles. o c. they can you understand what you read. o d. they can you avoid reading altogether.

In the practice of science, this type of reasoning is used to develop explanations.