Which of the following lists foliated metamorphic rocks is in order from lowest to highest grade?
What will be an ideal response?
Slate, schist, gneiss
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What physical feature of our planet is most dependent on supernova events?
a. oceans of water b. a breathable atmosphere c. organic chemicals d. uranium in Earth's interior e. a nickel-iron core
A hydraulic press multiplies a force by 100, which is done at the expense of
A) energy, which is divided by 100. B) the distance through which the force acts. C) the time through which the force acts. D) the mechanism providing the force. E) none of the above
A bird can sit harmlessly on a high-voltage wire because
A) the wire is insulated. B) no potential difference is across the birds feet. C) current is inside, not outside, the wire. D) the net charge on a current-carrying wire is zero. E) all of the above
A 200-volt battery is connected to a 0.50-microfarad parallel-plate, air-filled capacitor. Now the battery is disconnected, with care taken not to discharge the plates. Some Pyrex glass is then inserted between the plates, completely filling up the space. What is the final potential difference between the plates? (The dielectric constant for Pyrex is k = 5.6.)