Many applications of silicate glasses derive from their optical transparency, which gives rise to one of silicate glasses' primary uses as window panes. Glass will transmit, reflect and refract light; these qualities can be enhanced by cutting and polishing to make optical lenses, prisms, fine glassware, and optical fibers for high speed data transmission by light. Glass can be colored by adding metallic salts, and can also be painted and printed with vitreous enamels. These qualities have led to the extensive use of glass in the manufacture of art objects and in particular, stained glass windows. Although brittle, silicate glass is extremely durable, and many examples of glass fragments exist from early glass-making cultures. Because glass can be formed or molded into any shape, and also because it is a sterile product, it has been traditionally used for vessels: bowls, vases, bottles, jars and drinking glasses. In its most solid forms it has also been used for paperweights, marbles, and beads. When extruded as glass fiber and matted as glass wool in a way to trap air, it becomes a thermal insulating material, and when these glass fibers are embedded into an organic polymer plastic, they are a key structural reinforcement part of the composite material fiberglass. Some objects historically were so commonly made of silicate glass that they are simply called by the name of the material, such as drinking glasses and reading glasses. What are the answers to this following set of questions: 1. What can give glass a color?
2. What kind of enamel can be used on it?
3. What does glass do to light?
4. How can you make these qualities better?
5. Can you do this to make lenses for glasses?
6. What kind of transparency does it have?
7. What is one of the biggest uses for glass?
8. What kind of art can be made?
9. Why has is it so common for bowls and such/
10. Is sillicate glass fragile?
11. Can it last a long time?
12. What does it become when extruded?
13. Is that made out of fibers?
14. When they mat it down does that release the air?
15. What does it do?
Answer: 1. Metallic salts.
2. Vitreous
3. Transmit, reflect, and refract.
4. By cutting and polishing.
5. Yes.
6. Opitcal
7. Window panes.
8. Stained Glass Windows
9. It could be molded into any shape and it's sterile.
10. Yes
11. Yes
12. Thermal insulating material.
13. Yes
14. No
15. It traps the air.

Problem: Chapter 13: Preparing A Rescue.

Stanley remained where he was until Meinik returned, in half an hour, with the rope. Stanley made a loop at one end; and then knotted it, at distances of about a foot apart, to enable him to climb it more easily. Then they waited until the guard fire burnt down low, and most of the men went off into a hut a few yards distant, three only remaining talking before the fire. Then Stanley moved round to the other side of the palisade and, choosing a spot immediately behind the hut where the sentries were posted, threw up the rope. It needed many attempts before the loop caught at the top of one of the bamboos. As soon as it did so, he climbed up.

He found that the position was an exceedingly unpleasant one. The bamboos were all so cut that each of them terminated in three spikes, and so impossible was it to cross this that he had to slip down the rope again. On telling Meinik what was the matter, the latter at once took off his garment and folded it up into a roll, two feet long.

"If you lay that on the top, master, you will be able to cross."

This time Stanley had little difficulty. On reaching the top, he laid the roll on the bamboo spikes; and was able to raise himself on to it and sit there, while he pulled up the rope and dropped it on the inside. Descending, he at once began to crawl towards the hut. As he had seen before climbing, a light was burning within, and the window was at the back of the house. This was but some twenty yards from the palisade and, when he reached it, he stood up and cautiously looked in.
1. When did Meinik return?
2. What did he bring with him?
3. Who waited for him?
4. What did Stanley do with the rope?
5. Where?
6. And then did what?
7. How far apart were the knots?
8. Why?
9. Was his position pleasant?
10. What was he climbing?
11. How did the bamboo end?
12. Did this happen naturally?
13. Could he cross?
14. What did he do instead?
15. What did Meinik do to help?
16. And what did he do with it?
17. How long was it?
18. Did it help?
19. What did he do with it?
20. What did he crawl towards?
Answer: 1. in half an hour
2. the rope
3. Stanley
4. made a loop
5. at one end
6. knotted it
7. about a foot
8. so he could climb it more easily
9. no
10. bamboo
11. in three spikes
12. no
13. no
14. slip down the rope
15. took off his garment
16. folded it up into a roll
17. two feet long
18. yes
19. laid it on the spikes and sat on it
20. the hut

question: Paul and I live in the same building. His room is on the sixth floor but mine is on the fifth. He's very careless and sometimes he gets into trouble. Last Friday afternoon the young man and his friends went to spend the weekend on a wild island. They could swim, fish, play the guitar and sleep in the quiet place at night. They enjoyed themselves there. On the third morning they decided to get back to the land. But their boat hit a rock and soon went down. With the villager's help, they swam to the bank. Luckily none of them was hurt. They took a taxi and half an hour later they arrived at our town, but it was two in the night. The young man was hungry and thirsty. He wished to get home as soon as possible. Something was wrong with the lift, so he had to go up the stairs. He stopped by my door and brought out a key. Of course he could not open the door. Half an hour passed but he failed. He became angry and shouted, "I'll cut you down with a knife!" The noise woke me up and I opened the door. I understood at once what was happening and said, "You're trying to open a wrong door, Paul!" "Sorry, I can't agree with you, Charlie!" said the young man, "It's my room. You've entered it by mistake!"
1. who sometimes gets into trouble?
2. why?
3. who lives in the same building?
4. what floor is Paul on?
5. does the narrator live above him or below?
6. what did Paul do last Friday?
7. was it a peaceful and quiet island?
8. did they have fun?
9. what kinds of things did they do?
10. anything else?
11. what problem did they encounter?
12. why?
13. when did that happen?
14. where were they headed?
15. was anyone injured?
16. how did they end up getting back?
17. and then what?
18. who came to the narrator's door?
19. what did he have?
20. was he able to get in?
****
answer:
1. Paul
2. he is careless
3. I do
4. sixth
5. below
6. spent the weekend on an island
7. no
8. yes
9. swim, fish, and play guitar
10. sleep
11. their boat sank
12. it hit a rick
13. the third day
14. back to land
15. no
16. they swam to the bank
17. taxi
18. paul
19. a key
20. no