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DSST Physical Sciences2

Subjects : dsst, science

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Mechanical waves in a medium fxn to transport what?
Red
It is a rxn where you mix aqueous solutions of cations and anions and the ionic cmpds switch the ions with which they were paired
A function of the total number of molecules; if there is one mol of CO2 for every 2 mol of H20 then H20 is 2/3 the total pressure
Energy

2. What is the magnetic quantum number?
P = F(v) = mg(v -terminal)
The nucleus gains a proton and no neutrons
-l to +l
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

3. The freezing point of an aqueous solution is what kind of property? What does this mean?
Pascal (N*m^2)
Total internal reflection
Its twice that distance
Colligative: it depends on the number of solute molecules in a given volume of water

4. What are the three separate module for tensile stress - shear stress - and compression/expansion?

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5. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Toward the side with more gaseous molecules; towards the side that doesn't give off as much heat (remember heat is given off when molecules are formed and thus (-) enthalpy)
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

6. What color is above 656 nm?
Red
Quantum number that dictates the shape of an orbital; how many angular nodes are present? Spherical shape with no angular nodes thus you have 0 for angular momentum quantum number
V/m or N/C
Density (gravitational constant) height

7. Heat from friction comes from what?
+/- 1/2
From peak to peak
Ability to locate an event in space
Decreasing potential energy

8. What is one faraday equal to?
That they are catalysts in the rxn because they react with the substrate and are reformed
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
-l to +l
One mole of electric charge

9. Kb is the equilibrium constant for what?
When you have central atom with six ions on it
Voltage
F =ma and F= qE
The reaction between the base and water

10. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
How much energy is needed to raise one gram of a substance one degree celcius; it tells that you need more energy to increase temperature

11. If the standard potential for a rxn is negative when it is being reduced (thus a negative reduction potential) that means that the resulting atom has what?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
In the presence of a base
F =ma and F= qE
It has a positive oxidation potential so it is easily oxidized

12. If you have circuit elements in parallel what is the same across them?
Negative
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Voltage
NO; reduction-oxidation

13. So if you are given an equation and it gives you the E^o for both side equations seen in the big equation - what do you do with them?
Faraday/electrons
Attractive molecular forces acting between material surfaces in contact
Add them together
At an equal distance behind it as the object is in front of the mirror

14. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
Going from solid to gas phase
Toward the side with more gaseous molecules; towards the side that doesn't give off as much heat (remember heat is given off when molecules are formed and thus (-) enthalpy)
A saturated solution in which the aqueous ions are in equilibrium with the solid
The lowest one

15. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
3+
Only temperature of the water bath
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
They increase because you hear a lower frequency

16. The phase difference corresponding to a half wave is what? When do you get destructive interference?
T = 2pi/angular velocity; v/r
180 degrees; when there is half a wave distance in phase between two waves
[A]^a[B]^b
Energy

17. The Ksp for a substance of AaBb is what?
The part where it's straight almost up before it curves to plateau at new pH; it can tell you what indicator you could use to detect the equivalence point
+/- 1/2
[A]^a[B]^b
One mole of electric charge

18. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
Going from solid to gas phase
H has a small atomic radius
400 to 700 nm
It decreases; the work done by the gas in expanding decreases its internal energy

19. The visible spectrum ranges from ____ to _____
It's weight = mg; h
The density of the water and volume of the lead object
400 to 700 nm
Energy

20. When an element decreases its atomic number by one what is emitted?
The force along the board to the normal force
Positron because this is known as positron decay/electron capture
Pascal (N*m^2)
It's weight = mg; the work would be the weight times the distance fell

21. The square root of 10^anything is equal to what?
Half of the exponent
That they are catalysts in the rxn because they react with the substrate and are reformed
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
No - it increases the speed at which the rxn reaches that equilibrium

22. What is Newton's Universal Law of Gravitation?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
T = 2pi/angular velocity; v/r
F = GMm/r^2
[S][2S]^2 = 4S^3

23. What is a metathesis rxn?
It is a rxn where you mix aqueous solutions of cations and anions and the ionic cmpds switch the ions with which they were paired
The part where it's straight almost up before it curves to plateau at new pH; it can tell you what indicator you could use to detect the equivalence point
Mag and direction
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

24. How do you find moles of a substance when you are given faradays and electrons?
External components of the circuit
Neutrons; atomic number
It's weight = mg; h
Faraday/electrons

25. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
The current is the same
H = negative and S = positive
One that has more solute particles per liter of solution
When electron falls from high energy to low energy level

26. What is the principal quantum number (n)?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
It's weight = mg; the work would be the weight times the distance fell
(+)
Electron shell number

27. What direction do gravity and bouyancy work? What direction does water pressure work?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
It's weight = mg; h
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Vertically; perpendicular to all surfaces

28. The electrical force on a particle depends on what?

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29. Melting occurs at what type of temperature? Why?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Constant to overcome the heat of fusion (solid to liquid state)
180 degrees; when there is half a wave distance in phase between two waves
When HIn is turned into In- - which is dependent upon the pKa of the indicator

30. How would you find rate of rxn from pH 1 to pH2?
Isolating an atom from minerals by decomposing the minerals with an electric current
Look at how many times smaller the H concentration becomes with relation to rate law: if rate law says [H] is second order: ((10^-2)^2/(10^-1)^2 = 10^-2 and then times that answer by the original rate
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Mag and direction

31. The concentration of OH and H30 ions are approximately equal at what pH?
One that has more solute particles per liter of solution
7 always!!!
Negative
3+

32. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
Density (gravitational constant) height
Force times the distance over which the force acts
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
E = (kq)/r^2

33. For a given flow rate - the speed of fluid flow is inversely proportional to what?
It will take longer to melt if the water bath is only at 90 degrees rather than 100 degrees because at 100 degrees the temperature is hotter and thus it will melt faster than at 90 degrees
Going from solid to gas phase
The cross-sectional area through which the fluid flows
-l to +l

34. If the source of sound and the listener are traveling side by side at the same speed - what will the change in freq heard by the listener be?
Energy
V/m or N/C
0 Hz because they are traveling side by side at the same speed
F =ma and F= qE

35. Acetic acid is a ______ solvent
[S][2S]^2 = 4S^3
Positive
Polar
W = F(displacement)

36. What is the equation for bouyant force? What is p?
B = pVg; density
+/- 1/2
[S][2S]^2 = 4S^3
Energy

37. What is conserved in an inellastic collision?
Momentum
It will increase as well because they are directly related - only if pressure is kept constant
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
You look at what is being oxidized and reduced in the problem

38. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
That they are catalysts in the rxn because they react with the substrate and are reformed
Red
Total internal reflection
The volume of the ice cube or whatever it is

39. Light can be carried along a distance within a transparent material by means of what?
Gravity
The cross-sectional area through which the fluid flows
Total internal reflection
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

40. What kind of metals react violently with water?
It will take longer to melt if the water bath is only at 90 degrees rather than 100 degrees because at 100 degrees the temperature is hotter and thus it will melt faster than at 90 degrees
Alkali metals = first column
Toward the side with more gaseous molecules; towards the side that doesn't give off as much heat (remember heat is given off when molecules are formed and thus (-) enthalpy)
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

41. In a healthy person standing at rest - a comparison of arterial blood pressure measured in the arm with that in the leg - shows what about the differences between these pressures?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
It minimizes the reabsorption of the light because the light must exit the scintillator to reach the photomultiplier where it is converted to an electrical pulse
It will increase as well because they are directly related - only if pressure is kept constant
Total internal reflection

42. What does the empirical formula show?
The lowest whole number ratio of moles of each element in a mole of a cmpd
The particle's charge and the magnitude of the electric field
Colligative; the number of solute particles present
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

43. How do you find wavelength if you known distance from adjacent crests and troughs?
Positron because this is known as positron decay/electron capture
Where an event took place
Its twice that distance
Quantum number that dictates the shape of an orbital; how many angular nodes are present? Spherical shape with no angular nodes thus you have 0 for angular momentum quantum number

44. Friction is caused by what?
Attractive molecular forces acting between material surfaces in contact
Voltage
Energy
Faraday/electrons

45. Nuclear masses can be approximated from what?

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46. What is the relationship between P and n in PV=nRT?
They are directly proportional
It is a rxn where you mix aqueous solutions of cations and anions and the ionic cmpds switch the ions with which they were paired
The reaction between the base and water
Alkali metals = first column

47. What type of acid and base would produce a pH closest to 7?
The regular one
Strong acid and strong base/ weak acid and weak base
It will be reduced the voltage produced by the resistor which means IR; E- IR
One mole of electric charge

48. In Bohr model of atom when is energy emitted?
Quantum number that dictates the shape of an orbital; how many angular nodes are present? Spherical shape with no angular nodes thus you have 0 for angular momentum quantum number
Zero
Negative
When electron falls from high energy to low energy level

49. How many mL is in one liter?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Faraday/electrons
1000
Cathode; anode

50. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
A current; a magnetic field into a curved path; the charge and mass of the incoming particle and can be effectively used to distinguish different species of particles from one another
Electron shell number
Helium; 4

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DSST Physical Sciences2

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