question edit history translations

What is elemental oxygen used for?

cleaning

welding

painting

fire extinguishing

Oxy-fuel welding was invented in 1903 by French engineers Edmond Fouché and Charles Picard. Pure oxygen, instead of air, is used to increase the flame temperature: a common propane/air flame burns at about 2,000 °C (3,630 °F), a propane/oxygen flame burns at about 2,500 °C (4,530 °F), and an acetylene/oxygen flame burns at about 3,500 °C (6,330 °F).

Monica Stiller

3

Niklas Morberg wikipedia → Oxy-fuel welding and cutting

chemistryoxygentechnology

Chemistry quiz Technology quiz

You will play as

Answers by country

Greece

5%

88%

0%

5%

17

Austria

10%

72%

1%

14%

55

Germany

18%

66%

3%

11%

407

Poland

18%

64%

4%

12%

13887

Canada

7%

61%

1%

29%

68

Nigeria

4%

60%

3%

27%

127

Unknown

4%

60%

4%

28%

46

Switzerland

21%

60%

4%

13%

23

Ghana

15%

60%

0%

25%

20

Australia

3%

58%

6%

29%

112

New Zealand

17%

58%

5%

17%

17

the United Kingdom

12%

55%

5%

24%

356

Singapore

8%

54%

2%

34%

35

the United States

13%

52%

5%

25%

894

India

12%

51%

5%

28%

892

Pakistan

8%

48%

7%

33%

102

Malaysia

9%

45%

4%

40%

44

the Philippines

9%

43%

6%

39%

81

the United Arab Emirates

8%

41%

4%

41%

24

Republic of Ireland

10%

32%

3%

53%

28

Does the candle burn more or less violently in zero gravity?

Which area is brighter?

Both are the same

It depends on the order of seeing

How many dots at the intersections are black?

Which city was famed for its crossbowmen mercenaries during the Middle Ages?