If the internal resistance of my 1.5 volt battery is 0.50 ohms, what is the maximum possible power and current that can be delivered from it?
What will be an ideal response?
4.5 watts at 3.0 Amperes
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Which of the following is an example of convection?
A) warm air expanding and rising, while cooler air contracts and falls B) different kinds of material separating by density, like oil and water C) rocks sinking in water D) gas bubbling upward through a liquid
After an elastic collision of two balls, the kinetic energies of the two balls are measured to be 12 J and 24 J. What can be said about the kinetic energy of the two balls before the collision?
a. nothing—not enough information is given b. the balls had the same energies, 12 J and 24 J, respectively c. the total kinetic energy of the two balls was 36 J d. none of the above
The terrestrial planets are made almost entirely of elements heavier than hydrogen and helium. According to modern science, where did these elements come from?
A) They were produced by gravity in the solar nebula as it collapsed. B) They were produced by stars that lived and died before our solar system was born. C) They have been present in the universe since its birth. D) They were made by chemical reactions in interstellar gas.
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Answer the following statement true (T) or false (F)