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Biophysics > Fundamental Tools of Physics > Flashcards

Fundamental Tools of Physics Flashcards

1
Q

derived from Greek word physis meaning “nature or natural things”

A

physics

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2
Q

 Branch of natural science that deals with matter and energy and its interactions

A

physics

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3
Q

 both descriptive and predictive in nature

A

physics

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4
Q

nature of physics that deals with conceptual understanding, which involves theories, laws, and principles that explain different phenomena

A

descriptive

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5
Q

nature of physics that involves the use of mathematics as a tool in solving physical quantities in various cases.

A

predictive

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6
Q

the process of determining the value of an unknown quantity by comparing it with some pre-defined standard.

A

measurement

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7
Q

– any quantity that can be measured

A

physical quantity

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8
Q

 Its measurement always involved the comparison of the quantity to be measured with a reference standard of the same kind.

A

physical quantity

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9
Q

reference standard used for the comparison

A

unit

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10
Q

defined as a unit of measurement which has a fixed value that does not change from person to person or place to place

A

standard unit of measurement

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11
Q
  • Two major systems of unit of measurement in the world
A

SI units
English units

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12
Q

acronym for the Le Systeme d’Unites that is also known as the metric system

A

SI units

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13
Q

meaning of SI

A

Le Systeme d’Unites

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14
Q

 Standard system agreed upon by scientists and mathematicans

A

SI unit

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15
Q

also known as the imperial system

A

english system

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16
Q

 Once used by nations once ruled by the British Empire

A

English units

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17
Q

 Only the US uses the English units extensively

A

English units

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18
Q
  • Seven fundamental physical quantities
A
  1. Length (m)
  2. Mass (kg)
  3. Time (s)
  4. Electric current temperature (A)
  5. Amount of substance (mol)
  6. Luminous intensity (cd)
  7. Temperature (kelvin
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19
Q

SI unit for length

A

m

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20
Q

SI unit for mass

A

kg

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21
Q

SI unit for time

A

s

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22
Q

SI unit for electric current temperature

A

A

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23
Q

SI units for amount of substance

A

mol

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24
Q

SI unit for luminous intensity

A

cd

25
Q

SI unit for temperature

A

kelvin

26
Q

– physical quantities that cannot be explained in terms of other physical quantities

A

fundamental quantities

27
Q

quantities which are derived from fundamental quantities (e.g. volume, speed, etc.)

A

derived quantities

28
Q

units of derived quantities and are deducted rom fundamental units e.g. units of velocity, force, work, etc.

A

derived units

29
Q
  • are the base quantities of a unit system which are independent of other physical quantities.
A

fundamental quantities

30
Q
  • are the quantities which are derived from the fundamental quantities
A

derived quantities

31
Q

study metric prefix scale

A

+1

32
Q

1 kilo = ___ base unit

A

1000

33
Q

1 centi is equal to ___ base unit

A

0.01

34
Q

1 milli is equal to what base unit

A

0.001

35
Q

Area

what unit

A

m^2

36
Q

density

what unit

A

kg m^3

37
Q

velocity measurement unit

A

m/s

38
Q

acceleration unit

A

m/s^2

39
Q

momentum measurement unit

A

kg m/s

40
Q

force measurement unit

A

kg m/s^2

41
Q

pressure unit

A

pascal (Pa), kg/ms^2

42
Q

work measurement

A

joule (j), kg/ m^2s^-2

43
Q

energy measurement unit

A

j, kg/ m^2s^2

44
Q

Power unit

A

watt

45
Q

angle unit

A

radian (rad)

46
Q

torque unit

A

N m

47
Q

frequency unit

A

Hz

48
Q

impulse unit

A

N s

49
Q

Gravitational Constant unit

A

N m^2 / kg^2

50
Q

surface tension unit

A

N m-1

51
Q

angular momentum unit

A

kg-m2/sec

52
Q

moment of inertia unit

A

kg. m2

53
Q

A carpet is to be installed in a room whose length is measured to be 12.71m and whose width is measured to be 3.46m. Find the area of the room.

A

The area of the room is 44.0m2.

54
Q

The volume of a wallet is 8.50 in3 Convert this value to m3 using the definition 1 in = 2.54 cm.

A

The volume of the wallet is 0.000139m3.

55
Q

Three forces act on a point object: 100 N at 70.0 degrees South of West, 150 N at 50 degrees Northeast, and 200N East. Find their resultant and direction.

A

The resultant force acting on the point object is approximately 262.84 N at an angle of 4.58o North of East.

56
Q

A solid cube of aluminum (density 2.70g/cm3) has a volume of 0.200 cm3. It is known that 27.0g of aluminum contains 6.02x1023 atoms. How many aluminum atoms are contained in the cube?

A

Thus, the solid cube of aluminum contains approximately 1.20x1022 atoms.

57
Q

A solid piece of lead has a mass of 23.94g and a volume of 2.10cm3. From these data, calculate the density of lead in SI units (kg/m3)

A

11,400 𝑘𝑔 𝑚3

58
Q

a 5 N force is applied to the box at an angle of 30o counterclockwise from the positive x axis. What is the X and Y component of force

A

: the resultant vector force is 8.60 N at 84.46o counterclockwise from the positive x axis

59
Q

study more practice questions for vector quantities/conversion

A

+1

Biophysics (25 decks)

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