Introduction to Biology

Temperature

the motion of the particles that make up an object

the law of inertia

states that an object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

The action reaction law

states that for every action, there is an equal and opposite reaction, meaning forces always occur in pairs.

the law of acceleration

states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

When an object of a mass is moving at a velocity its momentum is…..

mv

when an object of mass is moving at a velocity its kinetic energy is

½ mv2

acceleration formula

is defined as the change in velocity per unit time.

a= v2-v1/ t

what is the formula for impulse

Ft = mv2 -mv1

Important formula

Ft = mv2 - mv1

what is carbon-14 dating

• organisms incorporate 14C to their body through photosynthesis and food chain. the 14C ratio in their body will be the same as that of the atmosphere

• once the organism dies, no new carbon atoms will be taken into its body, which 14C keeps decaying

• by measuring the 14C ratio of a dead body, we can tell how many years ago it died

Define an isotope

atoms with the same number of protons but different numbers