The potential difference across a resistor R, and the current running through it, both increase. We know that resistance
1.decreases.
2.increases.
3.remains the same.
4.changes in ways we cannot determine with the information given.
4
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Translational motion is characterized by
A) motion that carries a molecule from one place to another. B) the motion used in measuring temperature. C) both of these D) neither of these
In Ptolemy's theory, retrograde planetary motion is explained as
A) the backward part of the planet's loop-the-loop orbits around Earth. B) due to the back-and-forth or "oscillatory" motion that planets make as they move along their circular orbits around Earth. C) due to the natural wandering of the celestial sphere of background stars. D) a result of Earth's motion: as Earth passes another planet, that planet appears to move backward as seen against the background stars. E) Actually he didn't have an explanation for this.
The wavelengths of radiation from a star that is moving away from us
A) can be longer or shorter depending on the distance to the star B) are shorter than if the star were not moving C) are the same as if the star were not moving D) are longer than if the star were not moving
Which concept was NOT a part of Kepler's Laws of Planetary Motion?
A) All planetary orbits are ellipses. B) The square of the planet's period is equal to the cube of its average distance. C) A planet must move fastest in its orbit at perihelion. D) Epicycles are needed to explain the varying brightnesses of the planets.