Some questions I am stuck on. Hope you can answer them.
Estimate the smallest change in amount of petrol in a car tank that a typical petrol gauge can show.
Estimate the resolution of the skin of your hand as a temperature detecting device.
Show that the ascii code 32 is represented by the 8-bit binary code 00100000.
Show that
(a) the radio of the highest to the lowest frequency of the LF to EHF bands is 10 million.
(b) the ratio of their wavelengths is also 10 million.
If the 1m wire was folded in half, so that it was half as long but in effect has twice the cross-sectional area, show that its resistance would be 100ohms.
The monitor screen of a scanning electron microscope is 200mm x 200mm, and is scanned in 500 lines. If the corresponding area of a specimen is 1um x 1um, show that the linear magnification is 100000. Also show that the system can just resolve 2nm on a specimen.