Physics

Question 1

Define matter

Answer 1

Any substance that occupied space and has mass

Question 2

Matter may exist in what three states

Answer 2

Solid liquid and gas

Question 3

Define kinetic energy

Answer 3

Is the energy in motion

Question 4

Work is the product of what two factors

Answer 4

Force and distance moved

Question 5

What are the part of a lever

Answer 5

A rigid bar abd a pivot point call the fulcrum

Question 6

A wheel barrel in an example of what class of leveler

Answer 6

A second class lever

Question 7

Are all three states of matter affected, by thermal expansion and if so which states is affected

Answer 7

All three states are affected with gasses being affected the most.

Question 8

What is the british thermal unit

Answer 8

The amount of heat of energy required to change the temperature of 1 pound of water 1 degree fahrenheit

Question 9

Name the three methods of heat transfer

Answer 9

Conduction, convection and radiation

Question 10

What term defines the temperature which all molecular motion cease.

Answer 10

Absolut Zero

Question 11

Can liquids be compress

Answer 11

No,. liquids are generally considered imcompresible

Question 12

What are the customary units used to express hydraulic or pneumatic pressure in the USA

Answer 12

Pounds per square inch

Question 13

Describe how pressure is transmitted when pressure is applied in a confined liquid

Answer 13

Pressure is transmitted equal in all directions

Question 14

What formula expresses the relationship between force, pressure and area

Answer 14

Force equals area times pressure

Question 15

What is the approximate speed of sound at sea level on a standard day

Answer 15

661 Knots or 340 meters per second

Question 16

whats is the atmospheric pressure at sea level on a standard day

Answer 16

29.92 inches of mercury or 1013.2 millibars

Question 17

On a standard day at sea level what is the value of temperature

Answer 17

59 degrees Fahrenheit or 15 degrees Celsius

Question 18

What are the factors that determined density altitude

Answer 18

temperature and atmospheric pressure

Question 19

What is the term used to describe the ratio between the amount of moisture actually present in the atmosphere as compared to the amount the air could hold if it were completely saturated.

Answer 19

Relative humidity

Question 20

What are four principle forces acting on an airplane in flight

Answer 20

Lift, drag, thrust and gravity

Question 21

what is the term that describe the angle between the relative wind and the chord line of an airfoil

Answer 21

Angle of attack

Question 22

what are factors that cause an airplane wing to stall

Answer 22

Stall is cause when the angle of attack exceeds a critical value and the airflow separates from the upper surfaces and becomes turbulent.

Question 23

What are the principal effects that result from lowering the flaps while in flight

Answer 23

Lift increases drag increases and stall speed decreases

Question 24

What is the function of wing mounted vortex generratos

Answer 24

They dealy or keep the airflow from separating from the upper surface of a wing during high speed flight .

Question 25

How does blade flapping help to compensate for dissymmetry of lift in helicopter main rotor systems

Answer 25

Flapping increases the angle of attack and lift on the retreating blade and decreases the angle of attack and lift and the advancing blade.

Question 26

How does the airflow through the main rotor of a helicopter change during the transition from normal flight to autorotation

Answer 26

During normal flight the air moves downward and during autorotation the air moves upward

Question 27

what is friction

Answer 27

The opposition to relative motion between two objects in contact with each other