Periodic Table
Center of an atom that contains protons and neutrons
What is the nucleus?
atom with an unstable nucleus that emits radiation as it decays
What is a radioctive isotope?
smallest chemical unit of matter
force that opposes motion, resulting from contact of two surfaces
What is friction?
Standard unit of force
What is a Newton (kg x m/s2)?
direction of propagation is parallel to direction of oscillation
What is a longitudinal wave?
Sound is a this type of wave.
What is longitudinal?
Number of protons in an atom
What is the atomic number?
Time it takes half the original sample of a radioactive isotope to decay
What is half-life?
Positively charged subatomic particle
What is a proton?
tendency of an object to resist changes in its velocity
What is inertia?
Complete Newton's First Law- An object in motion (or at rest) will...
What is "tend to stay in motion (or at rest) until acted upon by an outside force"?
direction of propagation (travel) perpendicular to oscillation
What is a transverse wave?
How high or low a sound is (determined by frequency of sound wave)
What is pitch?
Sum of the number of protons and neutrons in the nucleus of an atom
What is the atomic mass?
Isotope releases excess energy by emitting a gamma ray
What is gamma decay?
part of an atom with no charge
Friction that opposes motion once the motion has started
What is kinetic friction?
Total force =
What is mass x acceleration?
Sections pulled apart in longitudinal wave (like troughs in transverse)
What is rarefactions?
how loud or soft a sound is (determined by amplitude of sound wave)
What is volume?
Collection of atoms with the same number of protons
What is an element?
process by which a radioactive isotope changes by allowing a neutron to decay into a proton, beta particle, and an antineutrino
What is beta decay?
Negatively charged part of an atom, much smaller than proton
What is an electron?
Friction that opposes the initiation of motion
What is static friction?
Complete Newton's Third Law. For every action...
V (speed)/ λ (wavelength)
What is frequency?
Sound produced as a result of an object traveling at or above Mach 1
What is sonic boom?
Atoms with same number of protons but different number of neutrons
What is an isotope?
Process by which a radioactive isotope changes by emitting 2 protons and 2 neutrons (4He nucleus)
What is Alpha decay?
Scientist who developed the modern model of an atom
Who is Niels Bohr?
kg x m / sec2
What is a Newton (standard unit of force)?
speed in a direction
What is velocity?
Standard unit of frequency
What is Hertz (1/sec)?
Faster than the speed of sound
What is supersonic?