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Flashcards in Physical Sciences Deck (54):
1

weightless

freely falling objects under Fg register no weight on a free falling scale

2

adiabatic

no transfer of heat

3

+ delta H

endothermic

4

- delta H

exothermic

5

Which way does increased pressure shift equilibrium?

towards the side of the reaction with less gas molecules

6

What does rate of reaction depend on?

activation energy

7

What effects K?

temperature only

8

Does K include pure solids or liquids?

no

9

What type of anhydrides do metals form?

basic anhydrides

10

What type of anhydrides do non-metals form?

acidic anhydrides

11

What are Lewis acids and bases?

Acid= accept electron pair (BF3, AlCl3)
base= donate electron pair

12

What are Bronsted acids and bases?

acid= donate H+
base= accept H+

13

What occurs at flat regions of the titration curve?

[acid]= [conj. base]

14

dispersion forces

exist between non-polar atoms and molecules

15

two types of solids

amorphous (ie. glass, polymers)
crystalline (repeated pattern of unit cell)

16

binding energy of electron

energy needed to detach one electron from an atom in its ground state

17

What happens to Theta when you go from high n to low n?

bends away from normal (Theta increases)

18

beat

two tones played simultaneously at different frequencies

19

resonance

driving frequency = natural frequency

20

harmonics

vibration at frequency of integer multiples

21

half-tone

smallest interval between 2 notes on a major scale

22

nodes

point on standing wave where A= zero

23

How does an increase in difference of frequency affect the frequency of beats produced?

increased difference in frequency = increased frequency of beats produced

24

How does increased lambda change the distance between peaks?

increased lambda= increased distance between peaks

25

Are objects moving towards each other or away from each other if the perceived frequency is higher than the emitted wave?

source and detector are approaching each other

26

mechanical wave

energy is transported, matter is not

27

radio wave

electromagnetic wave, travels at speed of light (c), higher frequency than sound wave but similar wavelength

28

What is conserved in an elastic collision?

Kinetic Energy

29

positron

mass number= 0, atomic number= 1

30

alpha particle

He, mass number=4, atomic number=2

31

gamma particle

mass number= 0, atomic number= 0

32

proton decay

proton decays into a neutron and a positron

33

Beta decay

emission of an electron

34

apoenzyme

enzyme without a cofactor

35

holoenzyme

enzyme with its' cofactor

36

What is sign of the EMF of a voltaic/galvanic cell?

positive

37

What is sign of the EMF of a electrolytic cell?

negative

38

Is anode of voltaic/galvanic cell positive or negative?

anode= negative, cathode= positive

39

Is anode of electrolytic cell positive or negative?

anode= positive (connects to + end of voltaic), cathode= negative (connects to - end of voltaic)

40

Which way do electrons flow in galvanic and electrolytic cells?

electrons flow from anode to cathode
anions flow to anode and cations flow to cathode

41

When is speed of sound fastest?

in a solid with high temperature because molecules are close together

42

Does a convex mirror diverge or converge light?

diverge (same as concave/ diverging lens)

43

Does a concave mirror diverge or converge light?

converge (same as convex lens)

44

Describe the focal length and radius of curvature of a convex mirror.

both are negative

45

How are colligative properties affected by presence of solutes?

increased concentration of solute= increase in boiling point and decrease in freezing point

46

fundamental frequency

the lowest frequency a standing wave can support, n=1, first harmonic

47

conservative force

performs work independent of path (ie. gravity)

48

What direction does current flow in a circuit?

from positive to negative terminal

49

What type of image (real/imaginary, right side up/inverted) does a converging lens/ mirror create if object is outside focal length?

real, inverted

50

What type of waves can be polarized?

only transverse waves because their movement is perpendicular to propagation

51

acid buffer

mixture of weak acid and conjugate base

52

destructive interference

occurs when waves are 1/2 lambda (wavelength) apart
180 degrees or pi difference in phase

53

What particles in a particle accelerator are best at ionizing matter?

alpha > proton > electron > neutron
most massive and most charged particles

54

Are compounds protonated or deprotonated at pH > pKa

deprotonated