After reading about gravity, Paolo tests his hypothesis that a feather and a marble will fall at the same rate. If the marble falls faster, what should Paolo do next?
A. Decide that the hypothesis is useless because it made an
incorrect prediction
B. Report that the results of the experiment were wrong
C. Conclude that his science textbook was mistaken about gravity
D. Look for other factors that affect how fast something falls

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

What is a good example of instantaneous speed

How do you know how many valence electrons an atom has?