[FONT="Comic Sans MS"]1.Some data obtained from the mass spectrum of a sample of carbon are given below.
Ion 12C+ 13C+
Absolute mass of one ion/g 1.993 x 10-23 2.158 x 10-23
Relative abundance/ % 98.9 1.1
Use the data...
I am struggling on the following questions and require help. Please reply as soon as possible.
1.720 cells are connected together to form a solar panel to power a remote telephone. The individual cells are connected in a grid of x cells in series and then these series lines joined in parallel...
Could somebody please help me on the following questions:
1. A camera with a 50mm focal length lens focuses on a man 1.8m tall standing 40m from the camera.
(a) What angle does the man subtend at the camera lens?
[I do not know what subtend means]
(b) What is the size of the image...
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