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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. Half-sine wave shape is what kind of wavelength with regards to length?
F = GMm/r^2
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
L = wavelength/2 so L= (wavelength)(2)
It's weight = mg; h

2. What is the doppler equation for wavelength and frequency?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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
The regular one
-l to +l

3. What is the law of conservation of linear momentum?
How strong a base is
Mv = mv
[A]^a[B]^b
When electron falls from high energy to low energy level

4. In radioactive decay the atomic number (A) and mass number (Z) must what?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
It can absorb light that lets other electrons fill those orbitals
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
They must balance

5. What is the magnetic quantum number?
-l to +l
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
A saturated solution in which the aqueous ions are in equilibrium with the solid
When you have central atom with six ions on it

6. What is the unit for Young's Modulus?
Where an event took place
The path is longer on the inclined plane so it will take object longer to reach the bottom
Pascal (N*m^2)
External components of the circuit

7. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
The lowest one
In the presence of a base
It's weight = mg; the work would be the weight times the distance fell

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

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9. How do you find moles of a substance when you are given faradays and electrons?
V/m or N/C
They do not differ
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Faraday/electrons

10. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
It can absorb light that lets other electrons fill those orbitals
The buoyant force on it; W = mg = pVg
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Alkali metals = first column

11. 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?
Accelerated by a higher voltage between the cathode and anode
Density (gravitational constant) height
Add them together
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

12. What is Newton's Universal Law of Gravitation?
Constant to overcome the heat of fusion (solid to liquid state)
One mole of electric charge
Positron emission
F = GMm/r^2

13. What kind of metals react violently with water?
They must balance
Cathode; anode
Alkali metals = first column
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

14. Strength of dispersion force increases with what?
Where an event took place
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 decreases; the work done by the gas in expanding decreases its internal energy
Ease of polarizability of the molecule and thus increasing molecular weight of mass

15. The freezing point of an aqueous solution is what kind of property? What does this mean?
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
Sp^3
Colligative: it depends on the number of solute molecules in a given volume of water
The lowest whole number ratio of moles of each element in a mole of a cmpd

16. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
You see how many moles of each are present and the one with the least is limiting; calculate how many grams/moles of a product will be made
Only temperature of the water bath
L = wavelength/2 so L= (wavelength)(2)
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

17. The closer the spacing of the anode wire - the better one can specify what?
Alkali metals = first column
400 to 700 nm
The regular one
Where an event took place

18. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
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 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 can also equal 'mg'; the compressive strength of a substance
Red

19. When a falling mass is at terminal speed - what is the power expended by the air resistance?
Where an event took place
P = F(v) = mg(v -terminal)
Yes - if the particle's trail is equidistant between two adjacent anodes
When HIn is turned into In- - which is dependent upon the pKa of the indicator

20. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
At an equal distance behind it as the object is in front of the mirror
Pascal (N*m^2)
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

21. 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
Voltage
H has a small atomic radius
Electron shell number

22. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
One mole of electric charge
Negative
Mg
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

23. How do you find specific gravity of an object?
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
T = (2h/g)^1/2; distance = vt
(density[p])(volume)
NO; reduction-oxidation

24. What is usually conserved over oscillation periods?
It can also equal 'mg'; the compressive strength of a substance
6.02 x 10^23 ions/mol
Decreasing potential energy
Energy

25. What type of acid and base would produce a pH closest to 7?
That of static friction; there is a net accelerating force on the block once it starts to slide
Strong acid and strong base/ weak acid and weak base
Colligative: it depends on the number of solute molecules in a given volume of water
It will be reduced the voltage produced by the resistor which means IR; E- IR

26. 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?
They do not differ
When electron falls from high energy to low energy level
E = (kq)/r^2
The density of the water and volume of the lead object

27. The volume of an object is equal to water?
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
It's weight = mg; the work would be the weight times the distance fell
Mass number stays the same but the atomic number increases
Liquid displaced by that object

28. When is a body in translational equilibrium?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
A salt and water
When all the external forces = zero
It will be reduced the voltage produced by the resistor which means IR; E- IR

29. What is the principal quantum number (n)?
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
You see how many moles of each are present and the one with the least is limiting; calculate how many grams/moles of a product will be made
NO; reduction-oxidation
Electron shell number

30. A plane mirror produces an image where?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Red
T = (2h/g)^1/2; distance = vt
At an equal distance behind it as the object is in front of the mirror

31. What color is above 656 nm?
Red
(density[p])(volume)
Electron shell number
The cross-sectional area through which the fluid flows

32. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Momentum
[S][2S]^2 = 4S^3

33. The basicity constant Kb measures what?
How strong a base is
F =ma and F= qE
T = (2h/g)^1/2; distance = vt
Colligative: it depends on the number of solute molecules in a given volume of water

34. The temperature of a metal will not increase above its melting point until what?
(+)
Negative
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

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

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37. Hydrogen has what kind of standard oxidation or reduction potential?
Zero
It will be reduced the voltage produced by the resistor which means IR; E- IR
Red
The element's mass number

38. If you have circuit elements in parallel what is the same across them?
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
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
Voltage
Accelerated by a higher voltage between the cathode and anode

39. Neither N2 or O2 have a permanent what? What does this mean?
Mass number stays the same but the atomic number increases
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
400 to 700 nm
That of static friction; there is a net accelerating force on the block once it starts to slide

40. Can a charged particle be detected by two anodes?

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41. What is the equation for pressure?
[A]^a[B]^b
A constant force on a mass causes it to have a constant acceleration
Density (gravitational constant) height
[S][2S]^2 = 4S^3

42. What is sublimation?
In the presence of a base
That they are catalysts in the rxn because they react with the substrate and are reformed
Isolating an atom from minerals by decomposing the minerals with an electric current
Going from solid to gas phase

43. In a rxn - how do you figure out which atom has the highest electron affinity?
F =ma and F= qE
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
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
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

44. What is Avagadro's number regarding ions/mol?
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 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
6.02 x 10^23 ions/mol
Energy

45. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
B = pVg; density
It decreases; the work done by the gas in expanding decreases its internal energy
(density[p])(volume)
400 to 700 nm

46. 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
L = wavelength/2 so L= (wavelength)(2)
(density[p])(volume)
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

47. Light can be carried along a distance within a transparent material by means of 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
It will be reduced the voltage produced by the resistor which means IR; E- IR
Total internal reflection
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

48. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
They do not differ
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
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. What happens if an atom undergoes positron decay or electron capture?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Vertically; perpendicular to all surfaces
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
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)

50. Can a catalyst shift equilibrium?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
No - it increases the speed at which the rxn reaches that equilibrium
The force along the board to the normal force
They are directly proportional