Derive from the order-of-magnitude equations for the planck epoch the energy density during the planck time: rho_p = c^7 / ( h_bar * g^2 )

Any color picture tube and electric field exerts a net force of magnitude 1.68x 10^-13 n on an electron the rest mass of an electron is 9.11 x 10^-13 what is the electron acceleration?

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

The experiment was repeated many years later but the gases were mixed in a different type of container. a white solid was obtained which was xenon fluoride. predict whether you think 1) krypton and 2) radon will react with fluorine. explain reasons for your predictions