As a forensic scientist, you are given the task of identifying an unknown substance found at a crime scene. Which method do you think would provide more reliable results - a flame
test or the emission spectrum? Explain.


How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms