Problem: Write a question you would see in a school textbook.

Answer: Paper chromatography is a process used to separate mixtures of substances into their components. The components are carried by a mobile phase through a stationary phase made of absorbent paper. An investigation analyzed a sample of black ink to determine its components.Which property allows the components to separate?

Problem: Write a question you would see in a school textbook.

Answer: Which of the following devices relies on electromagnetic radiation in the radio wave region of the spectrum for operation?

Problem: Write a question you would see in a school textbook.

Answer:
The students were told that the net applied force from the engine was the same for each vehicle tested. Based on this information, which vehicle had the greatest acceleration (a = F/m)?