Term
| Magnitude, Direction, Time |
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Definition
| What are the three categories of measurement? |
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Term
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Definition
| What unit of measurement is used to express scientific measurements? |
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Term
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Definition
| What is the english equivalent of 1 yard? |
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Term
Mass is quantity of matter that doesnt change.
Weight of a body is the force that attracts towards earth. |
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Definition
| Difference between mass of a body and weight of a body? |
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Term
| The person has the same pull of gravity that a mass of 195 would when near sea level. |
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Definition
| What is meant when a person is described as weighing 195 pounds? |
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Term
| Combinations of two or three fundamental units expressed as some combination of units. ex. watt=joule per second. |
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Definition
| How are derived units constructed? |
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Term
Velocity=Vector quantity or speed in a given direction.
Speed=Body moving along a path w/o reference to direction |
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Definition
| What is the difference between speed and velocity? |
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Term
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Definition
| What term is defined as the work done in lifting 1 pound a distance of 1 foot against the force of gravity. |
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Term
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Definition
| List the measurements included in the units of power. |
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Term
| Impenetrability of Matter |
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Definition
| What is the concept "two objects cant occupy the same space at the same time"? |
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Term
| A push or pull that exerts a force on the body. |
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Definition
| What action must be applied to an object to overcome inertia? |
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Term
| An increase or decrease in speed and/or change in direction of motion. |
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Definition
| What is meant by the term acceleration? |
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Term
| It has both direction and speed. |
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Definition
| Why is force considered a vector quantity? |
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Term
| The gravitational force exerted by the earth on the body, known as weight of that body, expressed in force units. |
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Definition
| In english system, what force is expressed in pounds? |
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Term
| It is its weight per unit volume. |
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Definition
| How is the density of a substance described? |
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Term
| It is the ratio of the density of the substance to the density of water. |
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Definition
| How is specific gravity of a substance described? |
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Term
| Kinetic energy (Moving bodies have energy because they can do work.) |
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Definition
| What term describes the energy of mass in motion? |
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Term
| The combination and arrangement of subatomic particles. |
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Definition
| What gives a substance its distinguishing characteristics? |
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Term
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Definition
| List the three subatomic particles of the atom? |
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Term
| Equal # of protons and electrons. |
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Definition
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Term
| # of protons in its nucleus. |
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Definition
| How is the atomic number of an element determined? |
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Term
| # of protons and neutrons in its nucleus. |
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Definition
| How is the atomic weight of an element determined? |
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Term
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Definition
| The outer electron shell of each atom of an element is completely filled. What type of element is this? |
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Term
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Definition
| Name the smallest unit that exhibits the distinguishing characteristics of a compound |
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Term
| The electron outer shell only. No change in either nucleus, electrons rearrange. |
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Definition
| In forming a compound, what part of the atom changes? |
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Term
| Study kinetic theory of gasses. |
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Definition
| What is one main use of absolute zero? |
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Term
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Definition
| List absolute zero on Celsius and Kelvin scales. |
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Term
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Definition
| "For a constant temperature, the product of the volume and pressure of an enclosed gas remains constant" |
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Term
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Definition
| Name branch of physics that deals with force, mass and motion. |
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Term
| The point where a single force, equal to the gravitational force and directed up, sustained the body at rest. |
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Definition
| Describe the point of an object that is its center of gravity. |
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Term
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Definition
| List the two classes of circular motion. |
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Term
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Definition
| A gyro rotor revolves OR rotates around its axis? |
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Term
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Definition
| What type of force is an accelerating force applied to the center of gravity of a body so that the body is accelerated with no rotation? |
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Term
work: 50x5 =250 ftlbs of work
Power: 250/15sec=16.666 ftlbs a sec |
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Definition
| Power expanded. 50 lbs 5ft in 15 sec? |
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Term
| When it can do work, such as a wound clock spring or compressed gas. |
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Definition
| When does an object have potential energy? |
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Term
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Definition
| What is lost whenever energy is expanded? |
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Term
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Definition
| What is the most common reason for efficiency loss in mechanical physics? |
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Term
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Definition
| What is the principle that allows man to accomplish work that he normally couldn't do. |
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Term
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Definition
| What force prevents a revolving object from continuing along a straight line? |
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Term
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Definition
| When an object is revolving, what force tries to oppose centripetal force? |
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Term
| Transmission, Reflection, Refraction, Absorption. |
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Definition
| What are characteristics all waves have? |
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Term
| Transverse waves- disturbance takes place at right angles to the direction of propagation. |
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Definition
| Electromagnetic waves are what type of waves? |
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Term
| If it reached he boundary of a media or an area within the media where the velocity of propagation of the wave changes |
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Definition
| A ray is traveling through a medium in a straight line. What would cause the ray to change its direction? |
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Term
| The path of a ray reflected from a surface forms an angle that is exactly equal to the one formed by the path of the ray reaching the medium. |
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Definition
| Why is the angle of incidence equal to the angle of reflection? |
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Term
| As a wave travels through one medium it is traveling at a specific velocity of propagation. when it reaches a new medium, the velocity of propagation changes. If the ray is not perpendicular to the boundary between the two media, the ray will change direction and bend. this is refraction. |
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Definition
| As a wave passes from one medium into another, what causes refraction? |
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Term
| Angle of incidence, index of refraction. |
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Definition
| What are the two factors that determine the angle of refraction? |
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Term
| When the path of waves is bent because of an obstruction. |
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Definition
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Term
| Relative motion btwn source and detector. Frequency at detector differs from frequency at source. |
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Definition
| What causes the doppler effect? |
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Term
| Conduction(solids) Convection(liquids), Radiation |
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Definition
| Three methods of heat transfer? |
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Term
| 5/9(96-32)= 5/9x64= 35.5 C |
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Definition
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Term
Transmitted through the substance
Reflected by the substance
Absorbed by the substance |
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Definition
| Effects on light waves when they meet a substance? |
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Term
1Total light produced by a source.
2Amount of light received per unit area at a distance from the source. |
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Definition
| What is luminous intensity? What is intensity of illumination? |
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Term
| Intensity of incident light |
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Definition
| Whaat is measured by the footcandle? |
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Term
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Definition
| What term describes the output of a light bulb? |
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Term
| Focus a beam of light. Change direction of a beam. Intensify illumination of an area. |
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Definition
| Principle use of reflectors? |
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Term
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Definition
| What happens when light passes through a transparent substance? |
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Term
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Definition
| Primary colors of light frequencies? |
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Term
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Definition
| If you mix primary colors, you get? |
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Term
| A source, A medium for transmission, A detector |
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Definition
| List the three components that are required by sound. |
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Term
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Definition
| List the two properties of a medium that govern the velocity of sound as it passes through the medium. |
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Term
| Elasticity of water is 15230 times that of air, travels four times faster. |
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Definition
| Why does sound travel faster in water than air? |
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Term
| If temp drops, density increases, velocity of sound decreases. |
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Definition
| Velocity of sound is lower at high altitudes because.... |
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Term
| Pitch, Intensity, Quality |
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Definition
| Three characteristics of sound? |
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Term
| The threshold of audibility and the threshold of feeling. |
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Definition
| Two terms to describe range of sound the human ear can distinguish. |
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Term
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Definition
| how do sound units vary with the amplitude of variations? |
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Term
| Difference btwn sounds of unequal intensity. Decibel describes ratio of two sound levels. |
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Definition
| The units of sound measurement are the bel and the decibel. they vary logarithmically with the amplitude of the sound variations. To what do the bel and decibel refer? |
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Term
| Electrical powers or acoustical powers. |
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Definition
| In sound system engineering, what ratio does dB express? |
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Term
| Gain of amp, Output of microphone, Power in a circuit compared to a chosen reference level. |
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Definition
| Name some of the uses of the decibel as it is used to express an electrical power ratio. |
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Term
| A reflection of sound waves |
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Definition
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Term
| 1Cover surface with a material that absorbs sound and reduces intensity. 2Change contour of surface and aim reflected sound somewhere's. 3change the position of loudspeaker. 4Vary the amp or pitch of signal. |
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Definition
| A loudspeaker is being used in a large room producing considerable echo that limits its usefulness. List four ways it can be corrected. |
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Term
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Definition
| Audible sound freq? Human can hear |
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