How is the total energy of a system defined? write an appropriate formula for power using the dot notation. write a hamiltonian function representing an electron in the presence of a stationary positive point charge. clearly justify your function.

In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door

The ozone hole appears in antarctica during

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system