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Physics for Health Sciences > Week 4 > Flashcards

Week 4 Flashcards

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1
Q

Atmospheric Pressure

A

Pressure exerted against bodies immersed in the atmosphere resulting from the weight of air pressing down from above.

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2
Q

Temperature

A

Measure of the average transitional kinetic energy per molecule of a substance, measured in Celsius, Fahrenheit or kelvins

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3
Q

Absolute Zero

A

The lowest temperature a substance can have, where atoms have the lowest kinetic energy

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4
Q

Heat

A

Energy that flows from one object to another by virtue of difference in temperature

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5
Q

Internal Energy/Thermal Energy

A

Total energy stored in an atom or molecule of a substance

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6
Q

Kilocalorie

A

Unit of heat, 1kcal = 1000 calories

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7
Q

Specific Heat Capacity

A

The quantity of heat required to raise the temperature of a unit of mass of a substance by 1 degree Celsius

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8
Q

Thermal Expansion

A

Relative quantity of expansion of the objects volume for a give rise in temperature

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9
Q

Heat conduction

A

Involves direct collisions between electrons adjacent to molecules

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10
Q

Convection

A

Heat transfer by movement of heated substance itself, e.g currents in fluid

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11
Q

Radiation

A

Energy transmitted by electromagnetic waves

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12
Q

Wave

A

Regularly repeating disturbance in a medium or field that transports energy from one place to the next with no net transport of matter

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13
Q

Periodic Motion

A

Equal intervals of time

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14
Q

Period

A

Time required to complete a single cycle

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15
Q

Frequency

A

Number of crests that pass a particular point per unit of time

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16
Q

Hertz

A

Measurement of Frequency

17
Q

Amplitude

A

Maximum displacement on either side of the equilibrium position

18
Q

Displacement

A

Term applied to the fluid that is moved out of the way when an object is placed in fluid

19
Q

Wavelength

A

The distance between successive crests or troughs or identical parts of the wave

20
Q

phase

A

one of the four main forms of matter: solid, liquid, gas or plasma

21
Q

Intensity

A

Power per square meter carried by a sound wave, measured in decibels

22
Q

Transverse Wave

A

a wave within vibration at right angles to the direction the wave is travelling

23
Q

Longitudinal Wave

A

A wave in which the individual particles of a medium vibrate back and forth along the direction in which the wave travels

24
Q

Compression

A

Region of increased pressure in a longitudinal wave

25
Q

Rarefraction

A

Region of reduced pressure in a longitudinal wave

26
Q

Constructive Interference

A

The combination of waves so that two or more waves overlap to produce a resulting wave of increased amplitude

27
Q

Destructive Interference

A

The combination of waves so that the crest part of one wave overlaps the trough part of another resulting in a wave with decreased amplitude

28
Q

Standing Wave

A

Stationary wave pattern formed in a medium when two sets of identical waves pass through the medium in opposite directions

29
Q

Node

A

Any part of a standing wave that remains stationary

30
Q

Anti-node

A

Part of a standing wave with maximum displacement and maximum energy

31
Q

Outline Boyle’s Law

A

The product of pressure and volume is constant for any given mass of confined gas regardless of changes in pressure or volume individual, as long as the temperature remains unchanged.
P1 x V1 = P2 x V2

32
Q

Ideal Gas Law

A

Combines relationship of pressure, volume and temperature.

P1 x V1 / T1 = P2 x V2 / T2

33
Q

Relate temperature of a substance to the molecular motion within the substance

A

Molecules increased kinetic energy = warmth

34
Q

Discuss the movement of heat between two substances that have different temperatures

A

Always from higher to lower

35
Q

Newton’s Law of Cooling

A

The rate of cooling is approximately proportional to the temperature difference between the object and its surroundings

36
Q

Relate frequency to period of a wave

A

t = F x P

37
Q

Relate speed, frequency and wavelength

A

S = (wavelength symbol - upsidedown y) x f

Physics for Health Sciences (10 decks)

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