Calculate the magnitude of an electric field at a charged water drop, which is at a distance of 4.8 x 10^(-3) meters from another charged water drop with a charge of 5.0 × 10^(-6) coulombs. (Consider the value of k as 9 x
10^9 newtonxmeters2/coulomb2.)

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)