The pressure in a water pipe in the ground floor of a building is 4x 10³ and three floors up is 2x10³PA. what is the difference in hight between the ground floor and the third floor? density of water = 1x10³kgm³.​

Write the function getkthdigit(n, k) that takes a possibly-negative int n and a non-negative int k, and returns the kth digit of n, starting from 0, counting from the right

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.