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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. What is sublimation?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Voltage
Going from solid to gas phase
The density of the water and volume of the lead object

2. What is the principal quantum number (n)?
Electron shell number
One mole of electric charge
It's weight = mg; h
(+)

3. In PV=nRT - if temp increases what will happen to volume?
No - it increases the speed at which the rxn reaches that equilibrium
7 always!!!
Its momentum is zero because velocity is zero; zero because of conservation of momentum
It will increase as well because they are directly related - only if pressure is kept constant

4. What is usually conserved over oscillation periods?
Colligative; the number of solute particles present
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
From peak to peak
Energy

5. What is weight equal to?
Going from solid to gas phase
That of static friction; there is a net accelerating force on the block once it starts to slide
Mg
Momentum

6. In order to increase the kinetic energy of electrons - they must be what?
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
+/- 1/2
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Accelerated by a higher voltage between the cathode and anode

7. What do electrolytic techniques involve?
At an equal distance behind it as the object is in front of the mirror
In the presence of a base
-l to +l
Isolating an atom from minerals by decomposing the minerals with an electric current

8. The coefficient of static friction is the ratio of what?
The number of electrons emitted
Positron emission
The force along the board to the normal force
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

9. What is the equation for work done?
It can absorb light that lets other electrons fill those orbitals
The lowest whole number ratio of moles of each element in a mole of a cmpd
Electron shell number
W = F(displacement)

10. What does the empirical formula show?
A positron or electron; when atomic number goes up you know an electron has been emitted
Mv = mv
The lowest whole number ratio of moles of each element in a mole of a cmpd
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

11. The concentration of OH and H30 ions are approximately equal at what pH?
Where an event took place
The particle's charge and the magnitude of the electric field
7 always!!!
External components of the circuit

12. The phase difference corresponding to a half wave is what? When do you get destructive interference?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
+/- 1/2
180 degrees; when there is half a wave distance in phase between two waves

13. In Bohr model of atom when is energy emitted?
Strong acid and strong base/ weak acid and weak base
Energy
When electron falls from high energy to low energy level
180 degrees; when there is half a wave distance in phase between two waves

14. If both weight and bouyant force are dependent on g - that makes g independent of what?
Mass number stays the same but the atomic number increases
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
The volume of the ice cube or whatever it is
180 degrees; when there is half a wave distance in phase between two waves

15. The boiling point of a solution is what type of property? Which means is depends only on what?
Colligative; the number of solute particles present
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
You look at what is being oxidized and reduced in the problem
The force along the board to the normal force

16. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Alkali metals = first column
They must balance
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Decreasing potential energy

17. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
The volume of the ice cube or whatever it is
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
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
Positive

18. 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?
Alkali metals = first column
An odd number
(+)
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

19. How would you find rate of rxn from pH 1 to pH2?
[S][2S]^2 = 4S^3
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
At an equal distance behind it as the object is in front of the mirror
Ease of polarizability of the molecule and thus increasing molecular weight of mass

20. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
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
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Positive

21. In a rxn - how do you figure out which atom has the highest electron affinity?
They increase because you hear a lower frequency
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
A constant force on a mass causes it to have a constant acceleration
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

22. Why are bonds between H and another atom shorter compared to most?
When electron falls from high energy to low energy level
E = (kq)/r^2
H has a small atomic radius
Faraday/electrons

23. Mechanical waves in a medium fxn to transport 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 element's mass number
6.02 x 10^23 ions/mol
Energy

24. If you have a decrease of pressure to which side of the equation is it equilibrium shifted towards? What about if you increase temperature?

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25. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
The lowest one
Force times the distance over which the force acts
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

26. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Mag and direction
[S][2S]^2 = 4S^3
T = 2pi/angular velocity; v/r

27. The square root of 10^anything is equal to what?
The nucleus gains a proton and no neutrons
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
B = pVg; density
Half of the exponent

28. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
It has a positive oxidation potential so it is easily oxidized
That they are catalysts in the rxn because they react with the substrate and are reformed
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

29. Neither N2 or O2 have a permanent what? What does this mean?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
When you have central atom with six ions on it
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
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

30. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
NO; reduction-oxidation
The element's mass number
The lowest one
Its intensity in the spectrum

31. What happens if an atom undergoes positron decay or electron capture?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
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
That of static friction; there is a net accelerating force on the block once it starts to slide
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)

32. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
+/- 1/2
-l to +l
Ability to locate an event in space
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

33. The Ksp for a substance of AaBb is what?
Gravity
Neutrons; atomic number
[A]^a[B]^b
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

34. What is the law of conservation of linear momentum?
It's weight = mg; the work would be the weight times the distance fell
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Mv = mv
H = negative and S = positive

35. What is the amt of energy that a frictional force generates?
No - it increases the speed at which the rxn reaches that equilibrium
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Force times the distance over which the force acts
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

36. What is a metathesis rxn?
The number of electrons emitted
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
They must balance
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

37. What does spatial resolution refer to?
Ability to locate an event in space
The nucleus gains a proton and no neutrons
7 always!!!
Momentum

38. If you are told to find the maximum number of NiCo3 that can form how do you do that?

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39. The freezing point of an aqueous solution is what kind of property? What does this mean?
Half of the exponent
Colligative: it depends on the number of solute molecules in a given volume of water
Strong acid and strong base/ weak acid and weak base
The element's mass number

40. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
+/- 1/2
P = F(v) = mg(v -terminal)
That of static friction; there is a net accelerating force on the block once it starts to slide

41. The free energy change (G) must be negative when what?
The nucleus gains a proton and no neutrons
H = negative and S = positive
Decreasing potential energy
T = (2h/g)^1/2; distance = vt

42. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
Where an event took place
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Mass number stays the same but the atomic number increases
Energy

43. What is the spin projection quantum number?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
A positron or electron; when atomic number goes up you know an electron has been emitted
B = pVg; density
+/- 1/2

44. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on 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 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
Isolating an atom from minerals by decomposing the minerals with an electric current
When electron falls from high energy to low energy level

45. Equivalent mass is what?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
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
P = F(v) = mg(v -terminal)
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

46. The number of incident photons on the cathode affect what?
The number of electrons emitted
A constant force on a mass causes it to have a constant acceleration
Add them together
Positron because this is known as positron decay/electron capture

47. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
Energy
One that has more solute particles per liter of solution
Liquid displaced by that object
Electrons from anode and battery

48. How do you find specific gravity of an object?
No - it increases the speed at which the rxn reaches that equilibrium
Mg
+/- 1/2
Mass per unit volume compared to water: so if mass is 15 g and displaces 5g of benzene the ratio of object to liquid mass is 15/5 = 3 and then times 3 by the specific gravity of benzene which is 0.7

49. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
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
External components of the circuit
Accelerated by a higher voltage between the cathode and anode
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

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

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