La investigates while objects are attracted by a magnet. She losts a paper clip, a crayon, and a nal. She holds a magnet two centimeters away from the object being tested. Each time she tests an item, she uses a different magnet in what we did she make mistake setting up her investigation?
She should have tested a total of 10 tems
She should have used the same magnet in each trial
She should have tested only one tom in her investigation
She should have had the magnet a centimeter away from each item.

Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?

Between 2014 and 2016, more than 25,000 children in flint, michigan, drank water that was contaminated with lead from lead pipes. during this time, the city claimed the water was safe to drink. which of these actions could the city have taken to ensure that the drinking water was free from lead?

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion.what is the frequency f of oscillation?