The simplest type of stream cipher, one in which one letter or character is exchanged for another, is known as what?

The concept of empiricism states that all rationally accepted knowledge is determined from experience. francis bacon was one of the first scientists to promote this theory. what was it’s impact on society?

Different isotopes indicate that an element will have different numbers of

The peak wavelength for the blackbody curve of a star is in the uv range. assuming the radiation from this star can reach earth, would you be able to see it?