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Science 10 > 2nd QT > Flashcards

2nd QT Flashcards

1
Q

Study of objects at rest

All forces acting on the body are balanced

A

static equilibrium

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2
Q

Point at which the weight is

evenly dispersed

A

Center of Gravity

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3
Q

For elongated bodies or
objects

COG is found at the fulcrum
where the object is pivoted.

A

Balancing Method

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4
Q

For regularly-shaped bodies
such as spheres, cubes, etc.

COG lies at its geometric
center

A

Geometric Method

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5
Q

For irregularly-shaped bodies

Object is suspended using a plumb
line or string

Intersection of lines drawn as traced
is the center of gravity of the object.

A

Plumb-Line Method

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6
Q

state of equilibrium where the body returns to its original position.

A

Stable Equilibrium

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7
Q

State of equilibrium where the
object moves to a different
position.

A

Unstable Equilibrium

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8
Q

the object moves to a different position but the COG is the same

A

Neutral Equilibrium

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9
Q

Methods Of Getting Equilibrium

A

Balancing
Geometric
Plumb-Line

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10
Q

States Of Equilibrium

A

Stable
Unstable
Neutral

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11
Q

factor affecting the stability of an object

A

Area of the base (the wider, the stable)
Position of the COG (the lower, the stable)
Weight of an object

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12
Q

Advantages of Taking down the COG of a vehicle (RIII)

A

Improved Aerodynamics
Improved Handling and Traction
Reduced Risk of Rollover
Improved Comfort

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13
Q

Disadvantages of Taking down the COG of a vehicle (IUCD)

A

Increased Bottoming Out
Unevenness in the Tire Wear
Conflict with Other Systems and Components
Damage to parts when flooding

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14
Q

Travels in the same speed as the speed of light (3.0 x 108
m/s)

Rectilinear motion (travel in
straight line)
A

Electromagentic Wave

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15
Q

Electromagnetic Radiation/Spectrum

A 
Gamma Rays (shortest, high energy)
X-ray
Ultraviolet
Visible Light
Infrared
Microwave
Radio (longest, low energy)
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16
Q

Most energetic form of light and have the shortest wavelength

Produced by supernova explosions or devastation of atoms.

A

Gamma Rays

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17
Q

Benificial use/harmful effect of gamma rays

A

Benefits:
Detecting cracks in pipes and aircraft parts
Sterilize medical equipment
Kills cancer cells

Harmful:
severe damage to human tissues

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18
Q

First observed by Wilhelm Roentgen

Emitted by Sun, stars, and comets

A

X-rays

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19
Q

from the sun

A

Ultraviolet Rays

20
Q

Responsible for being to see
the physical features of the
world

Used in photosynthesis

A

Visible Light

21
Q

Thermal in nature

The warmer the object is, the
higher the infrared radiation.

A

Infrared

22
Q

Used for Doppler radar to determine
weather

Used for heating food

Waves used for viewing Earth from
space

A

Microwaves

23
Q

Can travel long distances

Longest wavelengths in the
EM spectrum

Lowest energy, lowest
frequency

Used in electronic
transmission of sound

A

Radio

24
Q

Benificial use/harmful effect of radio waves

A

Benefits:
Telecommunication
Broadcasting

Harmful:
May cause cancer and leukemia
Headache
Increased body temperature

25
Q

Benificial use/harmful effect of Microwaves

A

Benefits:
Heating food
Locating objects
Communication satellites

Harm:
May cause cataract
Increased body temperature

26
Q

Benificial use/harmful effect of Infrared waves

A

Benefit:
Used in cameras and films for detecting
temperatures using colors

Harm:
eye and skin damage

27
Q

Benificial use/harmful effect of Visible Light Waves

A

Benefits:
Seeing the physical world
Photosynthesis
Observing astronomical objects

Harm:
Intense exposure can cause eye damage

28
Q

Benificial use/harmful effect of Ultraviolet Rays

A

Benifits:
Money mark detection
Production of Vitamin C

Harm:
Eye cataract
May cause skin cancer
Sunburn

29
Q

Benificial use/harmful effect of X-rays

A

Benefits:
Imaging bone condition through radiography
Medical diagnosis

Harm:
May cause damage to health tissues
Mutation

30
Q

reflection on a smooth
surface (clear reflection)

reflected rays are parallel

A

Specular

31
Q

reflection on a rough
surface (blurred)

reflected rays are intersecting

A

Diffuse

32
Q

Law that says: angle of incidence = angle of reflection, incident ray, reflected ray, and the normal line lie on the
same plane.

A

Laws of Reflection

33
Q

LOST/characteristics of a plane mirror

A

Location: behind the mirror

Orientation: upright

Size: same size

Type: virtual

34
Q

Curved mirror whose reflecting
surface is a part of an
imaginary sphere

May be concave or convex

A

Spherical mirrors

35
Q

aka: converging mirror

inner surface of a mirror is reflecting

A

concave mirror

36
Q

aka: diverging mirror

outer surface of a curved mirror is reflecting

A

Convex mirror

37
Q

four principal rays (PFCV)

A

P-F Ray
F-P Ray
C-C Ray
V-V Ray

38
Q

Characteristics of an image in a Concave Mirror:

Case A

A

L: at F

O: inverted

S: small size

T: real

39
Q

Characteristics of an image in a Concave Mirror:

Case B

A

L: between C and F

O: inverted

S: small size

T: real

40
Q

Characteristics of an image in a Concave Mirror:

Case C

A

L: at C

O: inverted

S: same size

T: real

41
Q

Characteristics of an image in a Concave Mirror:

Case D

A

L: beyond C

O: inverted

S: larger

T: real

42
Q

Characteristics of an image in a Concave Mirror:

Case E

A

No image formed

43
Q

Characteristics of an image in a Concave Mirror:

Case F

A

L: behind the mirror

O: upright

S: larger

T: virtual

44
Q

Characteristics of an image in a Convex Mirror

A

L: behind the mirror

O: upright

S: smaller

T: virtual

45
Q

OST of cases A, B, C

A

inverted, small size, real

Science 10 (2 decks)

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