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2962 topics
Scientific Paradigm: A scientific paradigm is a set of ideas, methods, and rules that guide scientists in their research. It helps scientists understand…
ax+by+c=0 is the general form. If b!=0 you can solve for y and recover slope-intercept. X-intercept: set y=0, then ax+c=0, x=-c/a (when a!=0). Y-intercept: set…
Organic compounds are defined as the hydrocarbons and their derivatives. More fully, organic compounds are carbon-containing compounds in which carbon…
Isotopes are atoms of an element whose nuclei have the same atomic number but different mass number. This is because atoms of an element can differ…
The atmosphere is mostly nitrogen (~78%) and oxygen (~21%), with argon (~0.9%) and trace greenhouse gases (water vapour, CO₂, O₃, CH₄). It shields UV…
A sinusoidal alternating current or voltage changes with time according to a sine or cosine function.
Cranial Nerves: Cranial nerves are the nerves that arise from the brain. There are twelve pairs of cranial nerves. Each nerve pair splits to serve the two…
Battery: A battery is a galvanic cell, or a group of galvanic cells joined in series. It generates electric current by a redox reaction. Fuel…
z^2 + 4 = (z+2i)(z-2i). Complete square: z^2 + 2z + 5 = (z+1)^2 + 4 = (z+1)^2 - (2i)^2. Roots come in conjugate pairs if coefficients are real.
Ionising radiation has enough energy to remove electrons from atoms or molecules, producing ions.
Vitamins: Vitamins are organic molecules that are important to an organism in small quantities for proper metabolic function. In simple words:…
A catalyst is a substance that accelerates a chemical reaction but remains chemically unchanged at the end of the reaction. The phenomenon is…
B Cells: B cells are differentiated in bone marrow. B cells express specific receptors on their cell membrane, the B cell receptors (BCRs).…
'Arrange', 'line up', 'first, second, third', 'codes', 'passwords order' -> permutation. President, VP, secretary from 10 people: 10P3.
Problem Solving: Problem solving defines the process of analyzing some situation and accordingly behaving to generate some response.
Intellectual Property Protection: Intellectual property protection involves safeguarding creations of the mind, such as inventions, designs, and artistic…
Grey coal smog vs brown photochemical. PAN irritates eyes (named). Temperature inversion named as trapping pollution (weather idea). Acid rain: H2SO4 and HNO3…
Elasticity is the ability of a deformed body to return to its original shape and size when the deforming forces are removed. Elastic Limit: The maximum…
An organ is a structure composed of two or more types of tissues that work together to perform a specific function. Most organs contain all four tissue types.…
a = <a1,a2,a3>. Magnitude |a| = sqrt(a1^2+a2^2+a3^2). Unit vector a-hat = a / |a| if a != 0. Negative -a flips direction.
The four biological molecules including carbohydrates, proteins, lipids, and nucleic acids are of fundamental nature in protoplasm because they are…
Oxidising power of the halogens falls down Group 17: F₂ > Cl₂ > Br₂ > I₂. A more reactive halogen displaces a less reactive halide from aqueous solution. Cl₂…
A right triangle has one 90 deg angle. The side opposite 90 deg is the hypotenuse. Given two sides, or one side and one acute angle, you can solve the rest…
Machine Learning (ML): Machine learning is a field within Artificial Intelligence that teaches computers to learn from data inputs and experience like…
