Which two electromagnetic waves are useful for diagnosing illnesses?

X-rays and radio waves
microwaves and gamma rays
gamma rays and visible light
radio waves and ultraviolet waves

About 70 percent of the earth's surface is water-covered, and about 96.5 percent of all earth's water is salt water. identify the watery feature on earth that is made of freshwater rather than salt water. a) bay b) glacier c) ocean d) sea it is not incomplete this is the true question

Write the overall equation for the reaction for lithium battery

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?