What is the difference between landforms and landmarks

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

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

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form