Physics, Math Feb 17 Exam

Front 1

Formula for pressure, force and area

Back 1

Force = Area x Pressure

Hint 1

FAP

Front 2

Formula for volume

Back 2

Volume = Area x Distance

Hint 2

VAD

Front 3

Convert inches to feet

Back 3

÷ 12

Front 4

Feet to inches

Back 4

X 12

Front 5

Area of a circle

Back 5

Pie(R)(R)

Front 6

Circumference

Back 6

Pie*Diameter

Front 7

Area of a triangle

Back 7

A=B*H/2

Front 8

Formula for work

Back 8

Work=Force*Distance

Front 9

Formula for power

Back 9

Power = Force*Distance/time

Front 10

Volume of a rectangle

Back 10

Length*Width*Height (cubed)

Front 11

Volume of a cylinder

Back 11

Pie*r*r(H)

Hint 11

Displacement

Front 12

Formula for horsepower

Back 12

Horsepower = force*distance/550*time (sec.)

Or 33,000*time (min.)

Front 13

Formula for mechanics (mechanical advantage) and meaning of letters

Back 13

L/l=R/E

L = effort arm

l = resistance arm

R = resistance

E = effort

Front 14

Trigonometry Functions

Back 14

SOH CAH TOA

When finding an angle use sin-, cos-, tan-

When finding a side use an angle and a side with sin, cos, tan

Front 15

Specific gravity formula

Back 15

Sg = weight of a substance/weight of equal volume water

Or

Sg = density of a substance/density of water

Front 16

What three things are necessary for the transmission and reception of sound?

Back 16

Source

Medium

Detector

Front 17

Sound waves are made up of

Back 17

Compressions, expansions (rarefactions)

Hint 17

2 things

Front 18

The _______ of sound will determine it's pitch

Back 18

Frequency

Front 19

Sound intensity is measured in ____.

Back 19

Decibels

Front 20

The ratio of the speed of an airplane to the speed of sound is measured in ______ numbers

Back 20

Mach

Front 21

If two objects w same natural frequency are next to each other, when one vibrates it can transfer it's wave energy to the other object, making it vibrate. Known as:

Back 21

Resonance

Front 22

The pressure exerted at the bottom of a column of liquid is determined by the _______ of the liquid, and the _______ of the column.

Back 22

Density, height

Front 23

Container of gasoline (specific gravity = 0.72) suspended at 58 inches above a carburetor, will produce a pressure of _______ psig

Back 23

1.5 psig

Front 24

A 6 inch cube of wood that weighs 2.8 pounds will displace ________ pounds of water when it's floating

Back 24

2.8 pounds

Front 25

1500 psi acting in an area of 6 Sq. In. Will produce a force of ______ pounds

Back 25

9000 pounds

Front 26

A force of 3000 pounds acting on an area of 4 Sq. In.

P =

Back 26

750 psi

Front 27

Air is neither added nor taken from air flowing through a venturi tube. At highest velocity, pressure will be ________.

Back 27

Lowest

Hint 27

Lowest/highest

Front 28

Atmospheric pressure is measured in

Back 28

Inches of mercury

Front 29

Standard day

Back 29

15°c, 0% humidity, sea level, 14.69 psi, 1013.2 millibars, 29.92 inches of mercury

Front 30

Pressure is the measurement of ______ per unit ______.

Back 30

Force per unit area

Front 31

Convert Celsius to Kelvin

Back 31

C + 273

Front 32

Fahrenheit to Kelvin

Back 32

First convert fahrenheit to Celsius:

C = (F - 32) ÷ 1.8

--F = 1.8(C) + 32--

Then Celsius to Kelvin:

K = C + 273

Front 33

Boyles Law and Formula

Back 33

Decrease the volume of a confined gas that is held at a constant temp., the pressure increases

V1/V2 = P2/P1

Front 34

Atmospheric pressure is measured in

Back 34

Inches (or mm) of mercury

Front 35

Absolute pressure

Back 35

Referenced fron zero pressure rather than atmospheric... :

Gauge pressure + atmospheric pressure

Front 36

General gas law formula

Back 36

P1*V1/T1 = P2*V2/T2

MUST CONVERT TEMP AND PRESSURE TO ABSOLUTE VALUES!!!

Front 37

Absolute value of temperature?

Pressure?

Back 37

Absolute Temperature K = (+/- 273)

Absolute Pressure psia = psig + 14.69 psi

Front 38

Unit of heat energy in English system

Back 38

British thermal unit

Hint 38

BTU

Front 39

Unit of heat in metric system

Back 39

Calorie

Front 40

1 BTU = _______ ft.pounds of work

Back 40

778

Front 41

1 calorie = _______ ft.pounds of work

Back 41

3.09

Front 42

Heat causes change of state but no temp change is

Back 42

Latent heat

Front 43

Three methods of heat transfer

Back 43

Conduction

Convection

Radiation

Front 44

Pressure referenced from zero pressure (vacuum) is

Back 44

Absolute pressure (psia)

Front 45

Pressure referenced from existing barometric pressure is known as

Back 45

Gauge pressure (psig)

Front 46

Pascals law

Formula

Back 46

When pressure is applied to a confined liquid, it exerts equal pressure at right angles to the container.

Force = Pressure x Area

Volume = Area x Distance

Front 47

Bernoullis principle

Back 47

Relationship b/w kinetic and potential energy in a fluid.

As the velocity (kinetic energy) increases, pressure (potential energy) decreases

Front 48

The speed of sound varies directly with the _________ of the ________.

Back 48

Temperature, air

Front 49

Doppler effect

Back 49

Source of sound moves, frequency ahead of the source is higher than the frequency behind it.

Front 50

Define frequency

Back 50

Number of vibrations completed per second (Hertz) frequency of sound determines pitch.

Front 51

Water freezes at ______ K and boils at _______ K

Back 51

273; 373

Front 52

Conduction:

Back 52

Requires physical contact

Front 53

Convection:

Back 53

Heat transferred through movement/circulation

Front 54

Radiation:

Back 54

Only form of energy transfer thay doesn't require presence of matter. (Sunlight)

Front 55

Specific heat:

Back 55

Heat req'd to raise the temp of 1 gram of a material 1°C

Front 56

Newton's 1st law (law of inertia)

Back 56

A body at rest will stay at rest, vice-versa, unless acted upon by an outside force

Front 57

Newton's 2nd law

Back 57

Force = mass x acceleration

Front 58

Newton's 3rd law

Back 58

For every action there is an equal and opposite reaction

Front 59

Difference b/w speed and velocity

Back 59

Velocity is the measurement of speed (distance over time) plus a given direction

Front 60

Vector:

Back 60

Expression of velocity. Has a magnitude and a direction.

Front 61

Centrifugal force:

Back 61

Pulls spinning object away from center of its rotation

Front 62

Centripetal force

Back 62

Opposite of centrifugal force. Pulls weight inwards, holding in circular path

Front 63

5 types of stress

2 basics?

Back 63

Tension

Torsion

Compression

Bending

Shearing

Tension, compression

Front 64

1 HP = ________ watts of electrical energy or _________ ft.pounds/min

Back 64

746; 33,000 (550 ft.pounds/sec.)

Front 65

Metric system power unit

Back 65

Joules

Front 66

A force thay causes rotation about a point is called

Back 66

Moment