Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

lecture1physics > Physic Quiz 1 > Flashcards

Physic Quiz 1 Flashcards

1
Q

what is mass verses weight

A

mass is amount of matter in an object
weight is gravitational force exerted on object by a much larger object i.e. weight on earth vs moon, different weight, same mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

velocity

A

involves displacement of object, time to make trip. Displacement can be positive, negative or 0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

displacement

A

can be positive, negative or 0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

scalar quantities, example

A

magnitude only, needs associated units (distance, height, age, etc.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Vectors with example

A

magnitude and direction, example velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

speed

A

involves distance, always positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

total length traveled

A

scalar value

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

acceleration

A

velocity change over time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

force

A

push or pull, newtons 2nd law (f=massxacceleration)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

increase force-what happens to mass, what happens to acceleration

A

mass stays the same, acceleration changes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

gravity

A

universal attraction=9.8m/s squared

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

pressure

A

force/unit area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

syringe example-double diameter, what happens to pressure

A

pressure decreases by factor of 4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

atmospheric pressure

A

weight of air above us from gravity

760mmHG=1 atmosphere=14psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

barometer

A

measures atmospheric pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

aneroid bellows gauge

A

expands/contracts without liquid interface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

bourdon gauge

what is it, and give example…

A

on tanks, measures change in tank pressure verses atmospheric pressure
total pressure is tank pressure+atmospheric pressure, if empty contains 1 atmosphere or 14 PSI if tank reads 0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

work

A

work=force times displacement, measured in joules, you must have displacement to have work

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

breathing is…

A

work

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

difference between speed and velocity

A

if you do not go anywhere, you do not have displacement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

kinetic energy

A

energy mass has by virtue of being in motion, energy of motion-example from class-skinny person vs. obese person, obese person has more energy (?)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

gases and work

A

gases that move can do more work, amount of work done by gas is path dependent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

state functions

A

Math functions that describe state of system, state of a system can be described by volume, pressure, or temperature
Example of a state function=internal energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

is work a state function

A

no

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

work in relation to pressure, time, and volume

A

if you do not change volume you did not do work

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

capacity to do work measured in…

A

joules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

calorie

A

the amount of energy to increase 1g H2O 1 degree Celsius

28
Q

potential energy

A

stored energy-example-batteries, airplane(can fall from sky), food

29
Q

internal energy

A

sum of kinetic and potential energy of a system, based on molecular level, example gas molecules in a cylinder

30
Q

thermodynamics

A

study of energy and how it is intercoverted

31
Q

0th law of thermodynamics

A

if temperature a=b, and b=c, then temperature a=c, two bodies of equal temperature will not exchange heat

32
Q

1st law of thermodynamics

A

change of internal energy of a system is equal to sum of heat processes that cause energy to flow into or out of a system

33
Q

endothermic

A

energy flows into a system

34
Q

exothermic

A

energy flows out of a system

35
Q

2nd law of thermodynamics

A

heat flows from hot to cold when 2 bodies are brought in contact with one and other

36
Q

3rd law of thermodynamics

A

you cannot lower an object to absolute 0 (no molecule movement, 0 degrees Kelvin)

37
Q

heat verses temperature

A

temperature is arbitrary way to look at heat transfer, heat is energy transferred from hot to cold

38
Q

specific heat with examples of low and high specific heat

A

amount of heat needed to raise temperature of 1 gram of material by 1 degree Celsius
Example from class-water has a large specific heat, metals do not (metals conduct heat via thermal expansion) on a cold bright sunny day, if you have a dark car it will get warm, but the lake will still be frozen
Heat capacity is always positive
high specific heat, good insulator, low specific heat good conductor

39
Q

heat capacity

A

ratio between amount of heat added or taken away object and change in temperature of that object
Larger objects=greater heat capacity
Heat Capacity=(mass)x(specific heat)

40
Q

Factors that affect heat rate of change

A

heat capacity, temperature, surface area, forced convection

41
Q

4 types of heat transfer

A

convection, conduction, radiation, and evaporation

42
Q

convection

A

30%-heat transfer caused by movement of liquid or gas-example giving anesthesia gas or transfusion of cold liquid cools patient

43
Q

conduction

A

20%-transfer of heat by direct interaction of hot molecules with cold molecules

44
Q

radiation

A

40%-all bodies absorb or emit electromagnetic radiation, example-Radiation from the sun, or solar radiation, can be harvested for heat

45
Q

evaporation

A

10%-heat loss via respiration

46
Q

density

A

mass/volume

47
Q

specific gravity

A

relationship between objects density in comparison to water

48
Q

Pasqual’s principle

A

pressure applied to a confined fluid is transmitted unchanged to every point within the fluid-example-Arterial line

49
Q

hydrodynamics

A

moving fluids, can be laminar or turbulent flow

50
Q

laminar flow

A

Laminar flow is characterized by unchanging flow pattern where adjacent layer of fluid smoothly slid past each other, organized

51
Q

turbulent flow

A

Turbulent flow has a continuously changing pattern of flow, chaotic
Turbulence creates resistance, and will slow down gas exchange

52
Q

Bernoulli equation

A

speed goes up, pressure exerted goes down. The faster a fluid flows, the less pressure it exerts, less lateral (wall) pressure
Slow fluids exert more lateral pressure
Bernoulli principle ties in to the law of conservation of energy

53
Q

Venturi flow meter

A

measures fluid speed in pipes, based on pressure differences at either end of pipe, Middle section with smaller diameter connected to two ends with larger diameter, pressure is less in narrow part of tube
breathing treatment

54
Q

viscosity

A

measure of fluids resistance to flow in relation to laminar flow, you are referring to viscosity, when you talk about turbulent flow, you refer to density of a liquid or a gas if you have high viscosity low flow and low viscosity high flow

55
Q

Poiseuille’s Law, 4 determinants, what is it?

A 
Laminar flow rate of fluid in pipe proportional to radius of pipe
16 pipes= one pipe twice the diameter 
-laminar flow only, depends on
-Radius of the tube
-Length of the tube
-Pressure difference
-Viscosity of the fluid
56
Q

property that determines laminar flow

A

viscosity

57
Q

Reynolds number

A

number > 1500-2000 causes flow to change to turbulent flow, proportional to viscosity, inversely proportional to density, and inversely proportional to radius of tube

58
Q

gases

A

minimal intermolecular forces among them, do not have shape or volume, expand to fill space that they occupy

59
Q

intermolecular forces
what is it?
what determines it?

A

how molecules interact and attract each other, primarily determined by chemical bonding, have electrostatic and repulsion towards each other

60
Q

solubility

A

like dissolves like, example polar water dissolves more readily than non-polar inorganic molecule

61
Q

3 non polar gases that dissolve poorly in water

A

nitrous oxide, CO2, and O2

62
Q

surface tension

A

increasing intermolecular forces increases surface tension, attracted to their neighbors

63
Q

water, surfactant lung relationship, and premature babies

A

water has high surface tension, cohesive liquid at intermolecular attractive forces that cause lungs to collapse, pre-mature babies lack surfactant

64
Q

LaPlace Law, its relationship to blood vessels, aneurysms

A

wall tension proportional to radius of vessel, explains why surface tension on blood vessel wall depends on radius of vessel, wall tension proportional to radius of vessel, aneurysms are spherical in shape, decreases wall tension

65
Q

vapor pressure

A

pressure of vapor in equilibrium with its liquid or solid state, gas pressure above liquid is vapor pressure

66
Q

as temperature rises vapor pressure increases or decreases

A

vapor pressure increases

67
Q

volatile

A

high vapor pressure-evaporates as soon as its liquid form exposed-example desflurane on counter

lecture1physics (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions