Question:
Read the text and answer the questions.
The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume. The symbol most often used for density is "" (the lower case Greek letter rho), although the Latin letter "D" can also be used. Mathematically, density is defined as mass divided by volume:

where "" is the density, "m" is the mass, and "V" is the volume. In some cases (for instance, in the United States oil and gas industry), density is loosely defined as its weight per unit volume, although this is scientifically inaccurate this quantity is more specifically called specific weight.

For a pure substance the density has the same numerical value as its mass concentration. Different materials usually have different densities, and density may be relevant to buoyancy, purity and packaging. Osmium and iridium are the densest known elements at standard conditions for temperature and pressure but certain chemical compounds may be denser.

To simplify comparisons of density across different systems of units, it is sometimes replaced by the dimensionless quantity "relative density" or "specific gravity", i.e. the ratio of the density of the material to that of a standard material, usually water. Thus a relative density less than one means that the substance floats in water.
1. Are they densities of everything the same?
2. What is the densest elements at regular conditions?
3. What is density of a substance?
4. How is defined mathematically?
5. What does V stand for?
6. What about P?
7. And m?
8. Is the p used actually the English one?
9. What language is it?
10. Which letter?
11. What is another symbol for density?
12. Who gives weight per unit volume as the definition?
13. Is this a good definition?
14. Would you use it in science?
15. What would be a better term for that definition?
16. Where is density the same value as it's mass concentration?
17. To make comparisons easier what stands in for density?
18. What's an example of that?
19. What's another one?
20. What is the relative density of something that floats?

Numbered answers:
1. no
2. Osmium and iridium
3. its mass per unit volume
4. mass divided by volume
5. volume
6. density
7. mass,
8. no
9. Greek
10. rho
11. D
12. the United States oil and gas industry
13. no
14. no
15. specific weight
16. For a pure substance
17. A dimensionless quantity
18. relative density
19. specific gravity
20. less than one

Question:
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(CNN) -- The man accused of hacking celebrities' online accounts -- from which private images were ultimately posted on the Internet -- says he became "addicted" to the intrusion and "didn't know how to stop."

"I deeply apologize. I know what I did was probably one of the worst invasions of privacy someone could experience," Christopher Chaney told CNN affiliate WAWS/WTEV in Jacksonville, Florida, Wednesday.

"And these people don't have privacy to begin with. And I was in that little sliver of privacy they do have."

Federal authorities accuse the 35-year-old of hacking into accounts on computers and other devices belonging to more than 50 people, including movie stars Scarlett Johansson and Mila Kunis and singer Christina Aguilera.

Chaney was indicted on charges of accessing protected computers without authorization, damaging protected computers, wiretapping and aggravated identity theft, officials said.

"Unfortunately, Mr. Chaney was able to access nude photos of some of the celebrities and some of them were uploaded on the Internet," U.S. Attorney Andre Birotte Jr. said Wednesday.

A recently circulated nude photo of Johannsson is part of the investigation, he said.

Chaney allegedly "also took financial information, movie scripts and conversations that the celebrities believed to be private," Birotte told reporters.

The FBI's Los Angeles office said he was arrested as part of "Operation Hackerazzi," which looked into computer intrusions targeting individuals associated with the entertainment industry.

In the interview with WAWS/WTEV, Chaney said the hacking "started as curiosity and it turned into just being, you know, addicted to seeing the behind-the-scenes of what's going on with these people you see on the big screen every day."
1. What did the guy that hacked celebrities accounts do?
2. WHat was his problem?
3. Who said that it was the worst case of privacy intrusion that they had seen?
4. How old was he?
5. About how many invasions?
6. Who were some of the celebrities affected?
7. Did he get convicted?
8. What were his charges?
9. What did he do with the nude photos he found?
10. What else did he do?
11. WHAT CELEBRITY HAD PHOTOS RELEASED ON THE INTERNET?

Numbered answers:
1. private images were ultimately posted on the Internet
2. "addicted" to the intrusion and "didn't know how to stop."
3. Christopher Chaney
4. 35
5. 50
6. Scarlett Johansson and Mila Kunis and singer Christina Aguilera.
7. unknown
8. accessing protected computers without authorization, damaging protected computers, wiretapping and aggravated identity theft
9. uploaded on the Internet
10. also took financial information, movie scripts and conversations that the celebrities believed to be private
11. Johannsson

Question:
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(CNN) -- World No. 1 Serena Williams' preparations for her Australian Open title defense suffered a late blip when she was beaten in the final of the Sydney International by Elena Dementieva on Friday.

The American, who had struggled past unseeded Frenchwoman Aravane Rezai in three sets in the semifinals when she appeared to injure her left leg, lost 6-3 6-2 to suffer her fifth defeat in her last eight clashes with the Russian.

"I was struggling a little bit, but she definitely deserves all the credit," Williams told reporters. "It's definitely not ligament problems. It's just a little pain but the strapping usually helps the pain go away."

Dementieva, who beat world No. 2 Dinara Safina in the quarterfinals, successfully defended her title in the final event before the first Grand Slam tournament of this decade starts on Monday.

"It's great to play against the best players in the world, especially going into a Grand Slam. It was a great experience and it'll help me next week at the Australian Open," she told the WTA Tour's official Web site

Dementieva went into the match against Williams having been handed a potential second-round clash with former world No. 1 Justine Henin, who pulled out of the Sydney event as a precaution after suffering a leg injury in her comeback tournament in Brisbane.

Seven-time Grand Slam winner Henin, handed a wildcard after a 20-month retirement, will start against unseeded fellow Belgian Kirsten Flipkens on Monday while fifth seed Dementieva plays fellow Russian Vera Dushevina .
1. Who's ranked first?
2. Which match is she preparing for?
3. Who was she beaten by?
4. What event was it?
5. When was it?
6. who got hurt?
7. How many sets wre played?
8. Did she think it was a ligament problem?
9. Was it painful?
10. Who beat Dementieva?
11. What was Safina ranked?
12. How many times has Henin won the Grand Slam?
13. Did she get a wildcard?
14. Had she retired?
15. For how long?
16. Who will she start against/
17. is she seeded?
18. What country is she from?
19. who is Dementieva playing?
20. is she russian?
Numbered answers:
1. Serena Williams.
2. Australian Open
3. Elena Dementieva
4. Sydney International
5. Friday.
6. Williams
7. Four
8. No.
9. A lttle.
10. No one.
11. Number 2.
12. 7 times
13. Yes
14. Yes
15. 20 months
16. Kirsten Flipkens
17. No.
18. Belgium
19. Vera Dushevina .
20. Yes