Find the heights of the first three blades of grass by clicking the tip of each blade. Measure the heights to the nearest tenth of a centimeter. Record the heights in
Table A. Complete the interactive to progress.

Now that you have the heights of all ten blades of grass, calculate the average height of the grass. Record the average height of the grass in Table A of your Student Guide.

What is the average height?
cm
I'm in section 3.

Where do magnetic lines of force enter earth?

Acommon technique in analysis of scientific data is normalization. the purpose of normalizing data is to eliminate irrelevant constants that can obscure the salient features of the data. the goal of this experiment is to test the hypothesis that the flux of light decreases as the square of the distance from the source. in this case, the absolute value of the voltage measured by the photometer is irrelevant; only the relative value conveys useful information. suppose that in part 2.2.2 of the experiment, students obtain a signal value of 162 mv at a distance of 4 cm and a value of 86 mv at a distance of 5.7 cm. normalize the students' data to the value obtained at 4 cm. (divide the signal value by 162.) then calculate the theoretically expected (normalized) value at 5.7 cm.

Which statement correctly describes the interaction between magnetic poles? north and south poles attract each other. north and south poles repel each other. two north poles will attract each other. two south poles will attract each other.