<em>How it works. </em><em>A camera obscura is a dark room with a small hole in one wall in its simplest form.</em><em> When it's bright outside, light enters through the hole and projects an upside-down image of the outside world onto the wall opposite the hole.</em>
There is a pdf found on the web. I recommend you to simply type in the name of the book and the author. You will get a lot of results but you simply have to filter the ones that will be useful to you. Use google, in my opinion it is the best search engine. There is yahoo and bing.
I hope it helps, Regards.<span />
1: Are
2: Is
3: are
4: are
5: don't
Stereotypes cause us to make incorrect assmutions about different groups of people.
For instance, the belief that people who wear glasses are math geniuses is a stereotype.
Answer:
Rudely pushing past other commuters, Sergio darted down the subway steps.
Explanation: