I am unique even though there are billions of me no two are the same what am I AND IT'S NOT A FINGER-PRINT

Aforce of 9.00 newtons acts at an angle of 19.0 to the horizontal. what is its component in the horizontal direction?

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above