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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. When a falling mass is at terminal speed - what is the power expended by the air resistance?
One that has more solute particles per liter of solution
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
P = F(v) = mg(v -terminal)
0 Hz because they are traveling side by side at the same speed

2. The free energy change (G) must be negative when what?
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
Isolating an atom from minerals by decomposing the minerals with an electric current
It can also equal 'mg'; the compressive strength of a substance
H = negative and S = positive

3. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
It can absorb light that lets other electrons fill those orbitals
Half of the exponent
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

4. What is the relationship between P and n in PV=nRT?
From peak to peak
T = (2h/g)^1/2; distance = vt
They are directly proportional
1000

5. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
That of static friction; there is a net accelerating force on the block once it starts to slide
Cathode; anode
How strong a base is
That they are catalysts in the rxn because they react with the substrate and are reformed

6. F in the Young's modulus equation can also equal what? What is E?

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7. Hydrogen has what kind of standard oxidation or reduction potential?
The reaction between the base and water
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
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)
Zero

8. If the equation says that the E^o has (-) voltage when being reduced - but it is being oxidized in the problem - what does the voltage then become?
The particle's charge and the magnitude of the electric field
400 to 700 nm
That it is negative
(+)

9. What is weight equal to?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Mg
Only temperature of the water bath

10. If asked which electron configuration of an element is most stable which one do you choose?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
0 Hz because they are traveling side by side at the same speed
3+
The regular one

11. What kind of metals react violently with water?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The lowest one
Alkali metals = first column
They do not differ

12. What is the formula for the power supplied by a battery to accelerate an electron beam?
P = IV
(+)
Pascal (N*m^2)
Force times the distance over which the force acts

13. What would the force be of a block on a pulley? What would be its displacement?

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14. How do you find moles of a substance when you are given faradays and electrons?
That they are catalysts in the rxn because they react with the substrate and are reformed
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
Faraday/electrons
Mv = mv

15. What type of acid and base would produce a pH closest to 7?
Density (gravitational constant) height
Half of the exponent
Where an event took place
Strong acid and strong base/ weak acid and weak base

16. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Going from solid to gas phase
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
L = wavelength/2 so L= (wavelength)(2)
The number of electrons emitted

17. Nuclear masses can be approximated from what?

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18. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Helium; 4
Yes - if the particle's trail is equidistant between two adjacent anodes
L = wavelength/2 so L= (wavelength)(2)

19. What is the principal quantum number (n)?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Electron shell number
Polar

20. Mechanical waves in a medium fxn to transport what?
Energy
No - it increases the speed at which the rxn reaches that equilibrium
The current is the same
It has a positive oxidation potential so it is easily oxidized

21. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
In the presence of a base
The path is longer on the inclined plane so it will take object longer to reach the bottom
It's weight = mg; h
One that has more solute particles per liter of solution

22. In radioactive decay the atomic number (A) and mass number (Z) must what?
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
A salt and water
They must balance
Neutrons; atomic number

23. If melting pt of a substance is 80 degrees - then what is the diff in time the substance melts when it is either placed in 100 degree test tube and 90 degree test tube?
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
Ease of polarizability of the molecule and thus increasing molecular weight of mass
No - it increases the speed at which the rxn reaches that equilibrium
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

24. How do you find wavelength if you known distance from adjacent crests and troughs?
Its twice that distance
F = GMm/r^2
Zero
The cross-sectional area through which the fluid flows

25. What does spatial resolution refer to?
Ability to locate an event in space
External components of the circuit
P = F(v) = mg(v -terminal)
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

26. The coefficient of kinetic friction is always lower than what? Therefore what?
That of static friction; there is a net accelerating force on the block once it starts to slide
The buoyant force on it; W = mg = pVg
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
F =ma and F= qE

27. The total pressure of a solution is what? Give example.
The cross-sectional area through which the fluid flows
P = IV
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
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

28. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
It will increase as well because they are directly related - only if pressure is kept constant
Pascal (N*m^2)
In the presence of a base
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

29. 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?
Colligative: it depends on the number of solute molecules in a given volume of water
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Energy
That it is negative

30. What is the equation for a period (T)? What is the equation for angular velocity?
T = 2pi/angular velocity; v/r
They do not differ
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
Mag and direction

31. When does red litmus paper turn blue?
In the presence of a base
Mass number stays the same but the atomic number increases
The reaction between the base and water
The element's mass number

32. 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
When HIn is turned into In- - which is dependent upon the pKa of the indicator
That it is negative
The lowest one

33. What if the circuit elements are in series?
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
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
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
The current is the same

34. The probability of an X-ray emission event at a given wavelength is measured by what?
The lowest whole number ratio of moles of each element in a mole of a cmpd
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
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
Its intensity in the spectrum

35. The freezing point of an aqueous solution is what kind of property? What does this mean?
Isolating an atom from minerals by decomposing the minerals with an electric current
B = pVg; density
Electron shell number
Colligative: it depends on the number of solute molecules in a given volume of water

36. Terminal voltage is provided to what?
External components of the circuit
Its twice that distance
Attractive molecular forces acting between material surfaces in contact
Total internal reflection

37. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
Sp^3
[S][2S]^2 = 4S^3
The number of electrons emitted
Its momentum is zero because velocity is zero; zero because of conservation of momentum

38. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
B = pVg; density
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
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
Decreasing potential energy

39. Can a catalyst shift equilibrium?
No - it increases the speed at which the rxn reaches that equilibrium
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Red

40. Heat from friction comes from what?
Decreasing potential energy
Positron emission
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
That of static friction; there is a net accelerating force on the block once it starts to slide

41. What is Newton's Universal Law of Gravitation?
Ability to locate an event in space
3+
F = GMm/r^2
They do not differ

42. In Bohr model of atom when is energy emitted?
Polar
T = 2pi/angular velocity; v/r
When electron falls from high energy to low energy level
The regular one

43. What is the equation for work done?
It's weight = mg; the work would be the weight times the distance fell
W = F(displacement)
NO; reduction-oxidation
Cathode; anode

44. The electrons emitted from cathode are replaced with what?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Sp^3
P = IV
Electrons from anode and battery

45. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Half of the exponent
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
Accelerated by a higher voltage between the cathode and anode

46. Light can be carried along a distance within a transparent material by means of what?
Total internal reflection
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Mv = mv
External components of the circuit

47. Strength of dispersion force increases with what?
They increase because you hear a lower frequency
T = 2pi/angular velocity; v/r
Ease of polarizability of the molecule and thus increasing molecular weight of mass
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

48. The square root of 10^anything is equal to what?
It can absorb light that lets other electrons fill those orbitals
Half of the exponent
T = (2h/g)^1/2; distance = vt
Yes - if the particle's trail is equidistant between two adjacent anodes

49. A saturated solution of KNO3 means what? If you add salt that has any of these two ions what will happen? What is this called?
B = pVg; density
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Its twice that distance
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

50. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
P = IV
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Colligative: it depends on the number of solute molecules in a given volume of water
(density[p])(volume)