Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
47 Cards in this Set
- Front
- Back
Newton's Laws of Motion:
1st Law |
an object will remain at rest unless a total force is exerted on it (inertia)
|
|
Newton's Laws of Motion:
2nd Law |
An object's acceleration is in the same direction as the force exerted on it.
|
|
Newton's Laws of Motion:
3rd Law |
For every action there is an equal and opposite reaction. (The Law of Conservation of Momentum)
|
|
Speed (definition)
|
how fast an item is moving without consideration of the objects direction
|
|
Velocity (definition)
|
involved both speed & direction
|
|
Acceleration (definition)
|
change in velocity over time
|
|
calorie (definition)
|
amount of engery it takes to raise 1 gram of water by 1 degree Celsius.
|
|
Calorie (definition)
|
amount of energy it takes to raise 1 kilogram of water by 1 degree Celsius.
|
|
Weight (definition)
|
represents the poull that the Earth's gravity has on an object
|
|
Mass (definition)
|
amount of matter an object contains
|
|
Two ways a wave travels
|
Longitiudinal & Tranverse
|
|
Describe longitiudinal (wave travel)
|
back and forth motion
same direction as the medium |
|
Describe transverse (wave travel)
|
up and down motion
perpendicular direction as the medium |
|
Work (formula)
|
force X distance
|
|
What determines pitch & loudness? (sound wave)
|
pitch - wavelength
loudness - amplitude |
|
In a light wave, amplitude is related to _________.
|
brightness
|
|
Explain the Doppler Effect.
|
When an object is moving toward another object it is compressing the wave (blue shift). When an object is moving away from another object the wave is being stretched (red shift).
|
|
What are the 3 types of radioactive decay?
|
1. Alpha
2. Beta 3. Gamma |
|
Describe Alpha Decay.
|
the loss of 2p + 2n = He
The element changes to 2 down of the periodic table. |
|
Describe Beta Decay.
|
-n = p + e (+ neutrino).
The element changes to 1 up on the periodic table. |
|
Describe Gamma Decay.
|
The protons and neutrons are reshuffling to find a more efficient arrangement. The element is the same but the engery is less.
|
|
Operation of the CT scanner.
|
The patient is on the x-axis while the scanner works in a sprial, moving on 2 axis' at a time.
|
|
Laws of Thermodynamics:
1st Law |
neither matter nor energy can be created or destroyed.
|
|
Laws of Thermodynamics:
2nd Law |
Law of Increased Entrophy. When useable engery gets used it becomes unuseable. Once engergy is unuseable it cannot become useable again. An increase in unuseable engery is an increase in entropy.
|
|
Law of Thermodynamics:
3rd Law |
refers to absoulte zero (0 degress Kelvin). However, nothing can reach absolute zero due to the 2nd Law of Thermodynamics.
|
|
Areas most suseptible to radition.
|
lens of eye, skin, GI tract (if ingested), reproductive organs
|
|
Fission
|
nucleus splits apart with strong force energy released (heavier than Fe)
|
|
Fusion
|
molecules join together (lighter than Fe)
|
|
Isotope
|
varying number of neutrons within an element
|
|
Half-life
|
The amount of time it takes for half of the isotopes to revert back to their most common form; e.g. C14 to C12
|
|
Describe Gamma Decay.
|
The protons and neutrons are reshuffling to find a more efficient arrangement. The element is the same but the engery is less.
|
|
Operation of the CT scanner.
|
The patient is on the x-axis while the scanner works in a sprial, moving on 2 axis' at a time.
|
|
Laws of Thermodynamics:
1st Law |
neither matter nor energy can be created or destroyed.
|
|
Laws of Thermodynamics:
2nd Law |
Law of Increased Entrophy. When useable engery gets used it becomes unuseable. Once engergy is unuseable it cannot become useable again. An increase in unuseable engery is an increase in entropy.
|
|
Law of Thermodynamics:
3rd Law |
refers to absoulte zero (0 degress Kelvin). However, nothing can reach absolute zero due to the 2nd Law of Thermodynamics.
|
|
Areas most suseptible to radition.
|
lens of eye, skin, GI tract (if ingested), reproductive organs
|
|
Fission
|
nucleus splits apart with strong force energy released (heavier than Fe)
|
|
Fusion
|
molecules join together (lighter than Fe)
|
|
Isotope
|
varying number of neutrons within an element
|
|
Half-life
|
The amount of time it takes for half of the isotopes to revert back to their most common form; e.g. C14 to C12
|
|
Entropy
|
lowest energy state; state of chaos
|
|
Law of Reflection
|
the angle of reflection is equal to the angle of incidence
|
|
4 fundamental forces on Earth
|
1. Gravity
2. Electromagnetism 3. Strong force 4. Weak force |
|
Waves (definition)
|
a traveling disturbance
|
|
3 types of heat transfer
|
1. Conduction
2. Convection 3. Radiation |
|
Simple Machines
|
1. Lever
2. Inclined plane, wedge, screw 3. Wheel & axle 4. Pulley - change direction/change effort |
|
Work (definition)
|
force placed on an object to cause displacement.
|