Acathode ray tube is made of glass with a small amount of some kind of gas in it. it has metal electrodes at each end to pick up an electric current. the electrodes are named "positive” and "negative,” which were words used by benjamin franklin in the 1700s to describe electricity. a bright ray forms in the gas when an electric current is applied to metal electrodes. in the 1800s, an important scientist suspected that the negatively charged particles in a cathode ray were present in all atoms. what procedure would allow that scientist to investigate this idea?

a)observing if the cathode ray forms when the electric current is off
b)making cathode ray tubes out of different materials to see if the ray is the same
c)using different magnets to see if the cathode ray responds in the same way to each
d)changing the strength of the electric current and observe how the ray forms and changes

Answer;

Making cathode ray tubes out of different materials to see if the ray is the same

Explanation;

A cathode ray tube (CRT) is a specialized vacuum tube in which images are produced when an electron beam strikes a phosphorescent surface.

Electrons were first discovered as the constituents of cathode rays. J.J. Thomson used the cathode ray tube to determine that atoms had small negatively charged particles inside of them, which he called “electrons.” According to Thomson negatively charged particles making up the cathode ray were actually pieces of atoms.

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

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3. when u click on your profile pic, there appears four options on the top.

4. click on the 1st option and scroll down and go at the bottom.

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6. there appears a option 'prefernces' and at that option at the right side , 'edit' is written.

7. click on the edit option.

8. there is a option " i want to delete my account" and click on that.

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