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DSST Physical Sciences2

Subjects : dsst, science

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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. What are the units of an electric field?
Its intensity in the spectrum
V/m or N/C
H has a small atomic radius
You look at how many electrons are needed to reduce one cmpd and that number will be put in front of that cmpd and you do the same thing that's oxidized as well: review #38 on test #11

2. What do electrolytic techniques involve?
You look at what is being oxidized and reduced in the problem
They do not differ
Isolating an atom from minerals by decomposing the minerals with an electric current
400 to 700 nm

3. The equivalence pt is what part of the titration curve? Thus looking at the range of change between the pH values along this part of the graph can tell you what?

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4. Kb is the equilibrium constant for what?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
T = (2h/g)^1/2; distance = vt
B = pVg; density
The reaction between the base and water

5. Isotopes have diff number of ______ but same what?
L = wavelength/2 so L= (wavelength)(2)
It can absorb light that lets other electrons fill those orbitals
Neutrons; atomic number
Pascal (N*m^2)

6. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
At an equal distance behind it as the object is in front of the mirror
It can absorb light that lets other electrons fill those orbitals
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The lowest one

7. At the moment of explosion of an object - what is its momementum? Why? After an explosion what is the total momentum carried by all the fragments?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Mass number stays the same but the atomic number increases
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
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

8. What is the magnetic quantum number?
Cathode; anode
-l to +l
[A]^a[B]^b
NO; reduction-oxidation

9. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The density of the water and volume of the lead object
You look at what is being oxidized and reduced in the problem
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
400 to 700 nm

10. The temperature of a metal will not increase above its melting point until what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
That of static friction; there is a net accelerating force on the block once it starts to slide
They do not differ
An odd number

11. What kind of metals react violently with water?
Decreasing potential energy
Alkali metals = first column
That it is negative
A positron or electron; when atomic number goes up you know an electron has been emitted

12. If both weight and bouyant force are dependent on g - that makes g independent of what?
-l to +l
The volume of the ice cube or whatever it is
They must balance
Red

13. What is the equation for bouyant force? What is p?
Ability to locate an event in space
B = pVg; density
The mass of an acid that yields one mole of H ions or the mass of a base that reacts with one mole of H ions
H has a small atomic radius

14. What happens if an atom undergoes positron decay or electron capture?
Ability to locate an event in space
Positron emission
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

15. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
The density of the water and volume of the lead object
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Colligative: it depends on the number of solute molecules in a given volume of water
Cathode; anode

16. If temperature arises during a mixture what can you conclude about the enthalpy?
One mole of electric charge
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
That it is negative
Energy

17. What is Newton's Universal Law of Gravitation?
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
F = GMm/r^2
Red
-l to +l

18. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
1000
It's weight = mg; h
One that has more solute particles per liter of solution
Add them together

19. Equivalent mass is what?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
They do not differ
The mass of an acid that yields one mole of H ions or the mass of a base that reacts with one mole of H ions
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

20. What direction do gravity and bouyancy work? What direction does water pressure work?
Electrons from anode and battery
Gravity
Vertically; perpendicular to all surfaces
It's weight = mg; the work would be the weight times the distance fell

21. If you have an alcohol with OH on the end and then another cmpd with an O in the middle but no H - what is different between the bonds they can make with water?

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22. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
A salt and water
Positive
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Mag and direction

23. The total pressure of a solution is what? Give example.
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
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Mv = mv
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

24. When you are trying to find the buyoancy force of water on a lead object what density do you use in the equation B = pVg? what volume?
The density of the water and volume of the lead object
Yes - if the particle's trail is equidistant between two adjacent anodes
The lowest one
H has a small atomic radius

25. If asked which electron configuration of an element is most stable which one do you choose?
It's weight = mg; h
F =ma and F= qE
The regular one
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

26. What color is above 656 nm?
P = F(v) = mg(v -terminal)
Red
F =ma and F= qE
Polar

27. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
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
Mass number stays the same but the atomic number increases
They increase because you hear a lower frequency
The current is the same

28. The visible spectrum ranges from ____ to _____
400 to 700 nm
[S][2S]^2 = 4S^3
The force along the board to the normal force
Energy

29. Beta decay is the same as what?
Positron emission
The reaction between the base and water
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Accelerated by a higher voltage between the cathode and anode

30. The freezing point of an aqueous solution is what kind of property? What does this mean?
Colligative: it depends on the number of solute molecules in a given volume of water
You look at how many electrons are needed to reduce one cmpd and that number will be put in front of that cmpd and you do the same thing that's oxidized as well: review #38 on test #11
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
A saturated solution in which the aqueous ions are in equilibrium with the solid

31. What is the magnitude of the electric field produced by a point charge?
Pascal (N*m^2)
It's weight = mg; h
E = (kq)/r^2
Vertically; perpendicular to all surfaces

32. Friction is caused by 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
The particle's charge and the magnitude of the electric field
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
Attractive molecular forces acting between material surfaces in contact

33. What energy conversion describes best what takes place in a battery-powered resistive circuit?
It has a positive oxidation potential so it is easily oxidized
1000
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Energy

34. The coefficient of static friction is the ratio of what?
The force along the board to the normal force
It can absorb light that lets other electrons fill those orbitals
(+)
The cross-sectional area through which the fluid flows

35. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
The regular one
Faraday/electrons
They increase because you hear a lower frequency
Cathode; anode

36. What is the unit for Young's Modulus?
Pascal (N*m^2)
3+
The particle's charge and the magnitude of the electric field
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

37. What is conserved in an inellastic collision?
H = negative and S = positive
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Momentum
Density (gravitational constant) height

38. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
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
At an equal distance behind it as the object is in front of the mirror
Mv = mv
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

39. When you are trying to calculate a galvanic cell's emf - what do you look at?
(density[p])(volume)
From peak to peak
You look at what is being oxidized and reduced in the problem
Helium; 4

40. In PV=nRT - if temp increases what will happen to volume?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
6.02 x 10^23 ions/mol
It will increase as well because they are directly related - only if pressure is kept constant
Colligative; the number of solute particles present

41. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
It can also equal 'mg'; the compressive strength of a substance
Liquid displaced by that object
Attractive molecular forces acting between material surfaces in contact

42. What is the spin projection quantum number?
+/- 1/2
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
[A]^a[B]^b
Yes - if the particle's trail is equidistant between two adjacent anodes

43. The electrons emitted from cathode are replaced with what?
The buoyant force on it; W = mg = pVg
Electrons from anode and battery
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
-l to +l

44. The volume of an object is equal to water?
7 always!!!
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
Liquid displaced by that object
Positron emission

45. Always remember that velocity has ____ and ____
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
From peak to peak
When all the external forces = zero
Mag and direction

46. The force on an electrical charge is what?
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
F =ma and F= qE
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
That it is negative

47. How many mL is in one liter?
It can absorb light that lets other electrons fill those orbitals
Look at the reactants and see which atom is being reduced - since it accepts the electron readily and is reduced we can assume it has the highest electron affinity
The nucleus gains a proton and no neutrons
1000

48. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
W = F(displacement)
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
At an equal distance behind it as the object is in front of the mirror

49. Half-sine wave shape is what kind of wavelength with regards to length?
A constant force on a mass causes it to have a constant acceleration
They must balance
L = wavelength/2 so L= (wavelength)(2)
Density (gravitational constant) height

50. What is the angular momentum quantum number (l)? It is the same as what? What does an S orbital appear to look like? What would it's (l) be?
0 Hz because they are traveling side by side at the same speed
The path is longer on the inclined plane so it will take object longer to reach the bottom
Faraday/electrons
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

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DSST Physical Sciences2

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