AL-Chemistry
smallest part of an element that can take part in a chemical change
atom
money paid to the government for public services
Tax
The total area of the surface of a three - dimensional object.
Surface area
The rate of change of velocity of an object;the unit is ms-2
Acceleration
a functionally and structurally distinct part of a cell, e.g. a ribosome or mitochondrion
organelle
sub-atomic particles located in nucleus，and its relative charge is zero.
neutron
what is the fundamental economic problem of having unlimited human needs and wants, in a world of limited resources
Scarcity
The amount of space occupied by a three - dimensional object.
Volume
Area under velocity-time graph
Displacement
a relatively large organelle found in eukaryotic cells, but absent from prokaryotic cells; the nucleus contains the cell’s DNA and therefore controls the activities of the cell; it is surrounded by two membranes which together form the nuclear envelope.
nucleus (plural: nuclei)
One type of shape for molecule
tetrahedral
The branch of economics that studies the economy of consumers or households or individual firms.
Microeconomics
A relation where each input (from the domain) has exactly one output (from the range), often written as f(x) (read as "f of x").
Function
In the absence of air resistance, an object has constant velocity horizontally and constant acceleration vertically
projectile
an organism whose cells contain a nucleus and other membrane-bound organelles
eukaryote
Energy stored in system
enthalpy
The cost of an opportunity forgone (and the loss of the benefits that could be received from that opportunity)
Opportunity Cost
The distance around the edge of a circle, calculated as 2\pi r (where r is the radius) or \pi d (where d is the diameter).
Circumference
A measurement of how difficult it is to change the velocity of an object, or change its speed or direction. It is a measure of the mass of an object; a massive object had large inertia.
Inertial
ability to distinguish between two points clearly as separate
Resolution
the energy needed to remove one electron from each atom in one mole of atoms of the element in the gaseous state to form one mole of gaseous 1+ ions.
ionisation energy
Goods which may replace each other in use.
Substitute Good
An equation of the second degree (highest power of the variable is 2), usually in the form ax^2 + bx + c = 0
Quadratic equation
Please describe prefix in multiples meaning. For example: kilo 10-3
Mega
Pico
Giga
Nano
Micro
Mega:106
Pico:10--12
Giga:109
Nano:10--9
Micro:10--6
a protein produced by a living organism that acts as a biological catalyst in a chemical reaction by reducing activation energy.(globular proteins.)
enzyme