Nolan tests how distance from a magnet affects the strength of the magnetic field. He tapes a magnet and a wooden ruler to the table so the ruler's end touches the magnet. Next, he places paper clips at different distances from the magnet and records his observations. What does he observe?

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables