Graphical Analysis: The figure shows a graph of the velocity of an object as a function of time. What is the displacement of the object from 0 s to 6.0 s?
A. 20 m
B. 40 m
C. 60 m
D. 80 m
E. 100 m
Answer: D
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Match the words in the left-hand column to the appropriate blanks in the sentences in the right-hand column. Use each word only once.
Saturn, Earth, Mars, Venus, Uranus, Mercury, Jupiter, Neptune
1. ____________ has a rotational axis that is tilted so much it lies nearly in the plane of its orbit.
2. ____________ is the planet with the highest average surface temperature.
3. The planet that orbits closest to the Sun is __________.
4. The only rocky planet to have more than one moon is ___________.
5. ___________ is the jovian planet that orbits closest to the Sun.
6. Most of the surface of _________ is covered with liquid water.
7. ___________ is about 30 times as far from the Sun as our own planet.
8. The planet with the lowest average density is ___________.
Which of the following best describes why the Sun emits most of its energy in the form of visible light?
A) Like all objects, the Sun emits thermal radiation with a spectrum that depends on its temperature, and the Sun's surface temperature is just right for emitting mostly visible light. B) Nuclear fusion in the Sun's core produces visible light photons. C) The visible light comes from energy level transitions as electrons in the Sun's hydrogen atoms jump between level 1 and level 2. D) The Sun's gas is on fire like flames from wood or coal, and these flames emit visible light.
The formation process for supermassive black holes is linked with the formation of galactic ____
a. disks b. clusters c. central bulges d. coronae e. halos
Capacitors in Combination: A network of capacitors is connected across a potential difference V0 as shown in the figure.(a) What should V0 be so that the 60.0-µF capacitor will have 18.0 µC of charge on each of its plates?(b) Under the conditions of part (a), how much total energy is stored in this network of capacitors?
What will be an ideal response?