A student analyzed iwo diagrams of a nitrogen atom. Both diagrams showed seven protons in the nucleus, but the number of neutrons differed What are the two nitrogen atoms?
A electrons
B isotopes
C covalent bonds
D ionic bonds

Rank the torques on the five doors shown in the figure above from least to greatest. note that the magnitude of all the forces is the same

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.

How many meters will a car travel if its speed is 45 m/s in an interval of 11 seconds? question 2 options: a) 450 meters b) 495 meters c) 4.09 meters d) 498 meters