Yeah I had a guess what assumed that was it but why is it included and not y or z aswell? Maybe I am missing an i hat which will get rid of the j and z hat cos of the dot product?anuttarasammyak said:
I’m not sure how to type maths in here but I think you have just helped me crack it, because it’s in the x direction only we ignore y hat and z hat, then In the product rule you’re left with the extra x.PeroK said:
By definition $$\vec A = A_x \hat i + A_y \hat j + A_z \hat k$$This can also be expressed as:$$A_x = \vec A \cdot \hat i$$bigmike94 said:
The term "DNA" stands for deoxyribonucleic acid and was coined by Swiss biochemist Friedrich Miescher in 1869. He discovered the substance while studying the nuclei of white blood cells and named it "nuclein" at first. It wasn't until 1944 that the name was changed to "deoxyribonucleic acid" by Oswald Avery, Colin MacLeod, and Maclyn McCarty, who proved that DNA is the hereditary material in living organisms.
The word "hypothesis" comes from the Greek word "hypotithenai" which means "to put under" or "to suppose." It was first used in the scientific context by philosopher and scientist Francis Bacon in the 17th century. He defined hypothesis as a tentative explanation of a phenomenon that can be tested through experimentation.
The term "evolution" comes from the Latin word "evolutio" which means "unrolling" or "opening." It was first used in the context of biology by French naturalist Jean-Baptiste Lamarck in the early 19th century. However, the concept of evolution had been discussed by philosophers and scientists long before the term was coined.
The word "atom" comes from the Greek word "atomos" which means "indivisible." It was first used by ancient Greek philosophers such as Democritus and Leucippus to describe the smallest unit of matter that cannot be divided. The modern concept of the atom was developed in the 19th century by scientists such as John Dalton, who proposed that atoms have different properties based on their mass and chemical composition.
The term "hypothesis testing" was first used by British statistician and geneticist Ronald Fisher in the early 20th century. He developed the concept as a way to evaluate the significance of experimental results and determine if they support or reject a specific hypothesis. The term has since become a fundamental tool in the scientific method and is used in various fields of research.