I use a rope 1.00-m-long to swing a 1.00-kg weight around my head. The tension in the rope is 20.0 N. In half a revolution how much work is done by the rope on the weight?

Photoelectric Effect: A metallic surface is illuminated with light of wavelength 400 nm. If the work function for this metal is 2.40 eV, what is the maximum kinetic energy of the ejected electrons, in electron-volts? (1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)

Fill in the blank(s) with the appropriate word(s).

Suppose that at a certain instant of time, the wave function shown below describes a certain quanton’s state. If we were to perform an experiment to locate the quanton, what would be the most likely result or results?

A.
B.
C.
D.

Astronomers use ________ to determine the magnetic field of white dwarfs.

A. the Zeeman splitting of spectral lines B. the doppler effect C. conservation of angular momentum D. Wien's law

Which of the following is a kilometer?

A) 109m B) 106m C) 1000 m D) 10-9m E) 10-6m