You have to cast the shadow of your pencil on the wall with the help of candles in a dark room. How can you obtain the shadow of
same size, small size and big size of the same pencil?

Suppose you have designed a new thermometer called the x thermometer. on the x scale the boiling point of water is 129 ? x and the freezing point of water is 13 ? x. part a at what temperature are the readings on the fahrenheit and x thermometers the same?