According to the uncertainty principle, a particle such as an electron
A) must have uncertainties in position and velocity that remain smaller than a particular prescribed value.
B) has a precise position and a precise velocity, but the observer is unable to determine them.
C) does not have a precise position or a precise velocity.
D) can have arbitrarily small simultaneous uncertainties in both position and velocity, although neither uncertainty can be zero.
E) is entirely made of sausage.
Question 2
Which of the following statements best describes the status of the Copernican and Ptolemaic theories of the solar system shortly after Tycho Brahe's observations?
A) These observations showed both theories to be incorrect.
B) These observations turned out to have little or no bearing on either theory.
C) These observations showed Ptolemy's theory to be the correct one.
D) These observations showed Copernicus's theory to be the correct one.
E) These observations showed both theories to be correct.
Electron micrographs of a cellular membrane.
Insects Under the Electron Microscope
Scorpions, Spiders and Sharks: Electron-Microscope Images
Electron micrograph of the plasma membranes of two cells showing the glycocalyx.
Clostridium difficile: (a) on blood agar and (b) scanning electron microscopy.
Gestalt Principle: Proximity