1. What is the value in Coulombs (C), of 50 elementary charges? (formula, substitution, answer) 2. Calculate the electrostatic force between two charges, one with a charge of +0.350 C and the other with a charge of -0.50 C (formula, substitution, answer)

3. A positive test charge of 4.0×10^-5 C is in an electric field, which exerts a force of 8.0×10^-3 N on it. What is the magnitude of the electric field intensity at the location of the test charge? (formula, substitution, answer)

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Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

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.

Which are true about beta reactions? there will be more than one answer. a. it has no change b. it doesn't change the mass of the number c. it has a mass of 0.0005 atoms d. it causes transmutation.