The first law of thermodynamics can be given as
Answer: ?E = q + w
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Why should galaxy collisions have been more common in the past than they are today?
A) Galaxies were closer together in the past because the universe was smaller. B) Galaxies attracted each other more strongly in the past because they were more massive; they had not yet turned most of their mass into stars. C) Galaxies were more active in the past and therefore would have collided with each other more frequently. D) Galaxies were much bigger in the past since they had not contracted completely.
The most geologically active moon in our solar system is Ganymede
Indicate whether the statement is true or false
An electron in a hydrogen atom makes a transition from the n = 3 to the n = 1 energy state. Determine the wavelength of the emitted photon (in nm)
a. 1006 b. 209 c. 306 d. 103 e. 821
In order for a body to exhibit simple harmonic motion there must be
A. a force drawing the body toward the center and decreasing with distance away from the center. B. a force drawing the body toward the center and increasing with distance away from the center. C. a constant force drawing the body toward the center. D. a constant force pushing the body away from the center. E. a force pushing the body away from the center and increasing with distance away from the center.