Why didn't you have to take separate measurements for the individual currents through resistors R1, R2, and R3 in Procedures 2, 3, and 4?
In a series circuit the current is the same in each component.
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Which of the following statements is true in the context of the formation of stars from the interstellar medium?
A) The densest interstellar clouds contain from 108-1011 atoms/cm3. B) The densest interstellar clouds have temperatures as low as 1000 K. C) Clouds can never resist their own gravity and eventually collapse under its influence to transform into stars. D) Stars can form in molecular clouds when the densest parts of the clouds become unstable and contract.
What mechanism likely accounts for whether a large icy planetesimal becomes a "water world" or a gas giant?
A) the timing of when the stellar wind blows away the remaining gas of the planet forming nebula B) the amount of heavy metals initially present in the disk C) the migration of larger planets through the disk D) the presence of other planets to make its orbit highly eccentric
A solid aluminum cube rests on a wooden table in a region where a uniform external electric field is directed straight upward. What can we say concerning the charge on the top surface of the cube?
A) The top surface is neutral. B) The top surface is charged negatively. C) The top surface is charged positively. D) The top surface's charge cannot be determined without further information.
All materials are magnetic and are described by one of these three properties. Select the property that is invalid.
A. ferromagnetic B. nonmagnetic C. diamagnetic D. paramagnetic