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Physics 110 > Chapter 4 > Flashcards

Chapter 4 Flashcards

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1
Q

a device that measures air pressure

A

barometer

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2
Q

an ionize gas

A

plasma

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3
Q

each is composed of two or more atoms

A

molecule

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4
Q

the relative presure between two places

A

gauge pressure

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5
Q

a combination of different elements or compounds

A

mixture

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6
Q

the upward force exerted by a fluid on anything immersed in it

A

buoyant force

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7
Q

the smallest unit of a chemical element

A

atom

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8
Q

the mass density of a substance divided by the mass density of water

A

specific gravity

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9
Q

particle that orbits the nucleus in an atom

A

electron

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10
Q

a unit of measure for pressure

A

atmosphere

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11
Q

the pressure exerted by a gas is the result of

A

molecular collisions

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12
Q

a device that measures absolute air pressure is called a

A

barometer

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13
Q

the difference between the pressure inside a tire an outside a tire is called the

A

gauge pressure

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14
Q

what are the units of pressure

A

atmosphere, psi, N/m, mmHg, pascal

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15
Q

normal atmospheric pressure is

A

14.7 psi, 760 mmHg, 101,000 pascals

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16
Q

if the same sized force is made to act over a smaller area the pressue is

A

increased

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17
Q

a plasma state of matter is

A

an ionized gas

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18
Q

the upwar force exerted by a fluid on an object immersed in it is called

A

buoyant force

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19
Q

when an object floats in a liquid, the buoyant force is

A

equal to the weight of the object

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20
Q

the nucleus of an atom contains

A

protons and neutrons

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21
Q

the positively charged particle inside an atom is the

A

proton

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22
Q

the non charge particle in an atom is the

A

neutron

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23
Q

the central core inside an atom is the

A

nucleus

24
Q

the particle that orbits the central core of an atom is the

A

electron

25
Q

the molecule is the basic unit of all

A

compounds

26
Q

DNA is a complex

A

molecule

27
Q

in the chemical formua for water, H2O, what does two mean

A

there are two hydrogen atoms in a molecule of water

28
Q

how many elements have been identified

A

114

29
Q

the buoyant force that jkeeps a ship afloat is an example of

A

Archimedes Principle

30
Q

the brakes in a car work because of

A

Pascals principle

31
Q

an atomizer works because of

A

Bernouli’s Principle

32
Q

a helium balloon rises because of

A

Archimedes’ principle

33
Q

when you suck through a straw, the force that makes the liquid go u the straw is

A

due to the pressure of the atmosphere

34
Q

the ratio of the density of a material to the density of water is the

A

specific gravity

35
Q

Water is flowing through a pipe whose cross sectional point at A is larger than the cross sectional area at point B. the reading on a pressure gauge connected to the pipe at point A willl be

A

Higher than the reading on a pressure gauge at Point B

36
Q

T/F a device that measures absolute air pressue is called a barometer

A

TRUE

37
Q

T/F the difference between the inside and outside of the tire is called the absolute pressure

A

FALSE

38
Q

T/F the SI unit of pressure is the pascal

A

TRUE

39
Q

T/F psi is a unit of force

A

FALSE

40
Q

T/F an ionized gas is called plasma

A

TRUE

41
Q

T/F plasma will conduct electricity

A

TRUE

42
Q

T/F gases an liquis are both fluids

A

TRUE

43
Q

T/F the upward force exerted by a fluid on an object immersed in it is called the buoyant pressure

A

FALSE

44
Q

T/F when an object floats in a liquid, the buoyant force is larger than the wight of the object

A

FALSE

45
Q

T/F the positively charged particle inside an atom is the nucleus

A

FALSE

46
Q

T/F the uncharged particle inside an atom is the neutron

A

TRUE

47
Q

T/F the central core in an atom is the neutron

A

FALSE

48
Q

T/F the object that orbits the central core inside an atom is the electron

A

TRUE

49
Q

T/F the number of protons in a nucleus of an atom tells which element it is

A

TRUE

50
Q

T/F the buoyant force that keeps the ship afloat is an example of Pascals Principle

A

FALSE

51
Q

T/F the brakes in a car work because of Pascals principle

A

TRUE

52
Q

T/F an atomizer works because of Bernouli’s principle

A

TRUE

53
Q

T/F a helium balloon rises because of Archimedes’ princilpe

A

TRUE

54
Q

T/F air can be compressed easily because there is a great deal of empty space between air molecues

A

TRUE

55
Q

T/F grvity causes the pressure in the ocean to vary by depth

A

TRUE

56
Q

T/F in a flowing fluid the pressure where the fluid is moving slower is higher than the presure where the fluid is moving faster

A

TRUE

Physics 110 (6 decks)

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