Robots have been around since the 3rd century BC. At that time, they were mainly invented as toys to amuse the king or emperor. Now, robots help life on Earth by... I. gathering information from areas that humans cannot easily study. II. performing repetitive jobs more quickly and accurately than humans. III. making it possible for humans to be completely unnecessary in factories and research facilities. A. II and III only B. I and II only C. I and III only D. I, II, and III

The correct answer is

B. I and II only

Explanation:

The limitations of robots in factory and research include

1. Robots are capital intensive and require high cost to maintain while still being maintained by humans

2. Robots develop fault and require specific procedures to rectify the fault hance there is high potential for delays in factory production work.

3. When there is a cause for alteration of process or change in operation, the robot most likely will have to be changed as well whike the humans implement the change

4. In research, robots can not recognize unexpected variation indications and synthesis of ideas to explain observed anomalies like humans.

5. A robot does not increase in knowledge of an subject they work on whichose valuable insight is vital to research

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.