PF 1A

In experiments that measure cosmic rays which are located deep underground, the two types of particles that most commonly reach the apparatus are

• alpha particles and neutrinos

• protons and electrons

• positrons and electrons

• muons and neutrinos

A single-electron atom has the electron in the l=2 state. The number of allowed states of the quantum number m_l is

• 1

• 3

• 5

• 4

An atom has filled the n=1 and n=2 levels. How many electrons are in the atom?

• 10

• 6

• 8

• 16

In the atomic structure of elemental Carbon, the nearest neighbors of each C atom lie at the corners of a

• square

• Cube

• Tetrahedron

• Octahedron

The sign of the charge carriers in a doped semiconductor can be inferred by measuring the following property

• Specific Heat

• Hall Effect

• Electrical Resistivity

• Magnetic Susceptibility

In order for a transistor to work as a logical gate it should be in the following zones

• Saturation and Active

• Active and Cut-off

• Cut-off and Saturation

• None of the above

The viscosity of a Newtonian fluid is totally invariant

• True

• False

Which Colombian Scientist has a moon crater named after him/her?

• Francisco José de Caldas

• Julio Garavito Armero

• Ana María Rey

• Rodolfo Llinás