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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.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
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 element's mass number
It will increase as well because they are directly related - only if pressure is kept constant

2. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
+/- 1/2
Half of the exponent
Only temperature of the water bath

3. What is the spin projection quantum number?
Only temperature of the water bath
The force along the board to the normal force
+/- 1/2
A positron or electron; when atomic number goes up you know an electron has been emitted

4. When an element decreases its atomic number by one what is emitted?
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
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
Negative
Positron because this is known as positron decay/electron capture

5. Neither N2 or O2 have a permanent what? What does this mean?
One that has more solute particles per liter of solution
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
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
180 degrees; when there is half a wave distance in phase between two waves

6. What is weight equal to?
The particle's charge and the magnitude of the electric field
7 always!!!
Mg
The volume of the ice cube or whatever it is

7. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
They increase because you hear a lower frequency
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Where an event took place
Its twice that distance

8. When does red litmus paper turn blue?
In the presence of a base
Mg
Its twice that distance
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

9. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
Ability to locate an event in space
Voltage
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
It has a positive oxidation potential so it is easily oxidized

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

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11. What is the principal quantum number (n)?
Force times the distance over which the force acts
Vertically; perpendicular to all surfaces
Electron shell number
V/m or N/C

12. What kind of metals react violently with water?
Alkali metals = first column
A salt and water
The path is longer on the inclined plane so it will take object longer to reach the bottom
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

13. What does spatial resolution refer to?
Ability to locate an event in space
Vertically; perpendicular to all surfaces
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
H has a small atomic radius

14. What are the units of an electric field?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
V/m or N/C
Its intensity in the spectrum

15. Why does light travel slower in an optically dense medium than through a vacuum?
One that has more solute particles per liter of solution
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

16. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
+/- 1/2
Cathode; anode
That they are catalysts in the rxn because they react with the substrate and are reformed
[A]^a[B]^b

17. 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?
Positron emission
Neutrons; atomic number
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
The density of the water and volume of the lead object

18. How would you find rate of rxn from pH 1 to pH2?
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
The reaction between the base and water
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
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

19. 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
It decreases; the work done by the gas in expanding decreases its internal energy
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Colligative; the number of solute particles present

20. In radioactive decay the atomic number (A) and mass number (Z) must what?
A positron or electron; when atomic number goes up you know an electron has been emitted
You look at what is being oxidized and reduced in the problem
They must balance
P = F(v) = mg(v -terminal)

21. What type of acid and base would produce a pH closest to 7?
The path is longer on the inclined plane so it will take object longer to reach the bottom
One that has more solute particles per liter of solution
Strong acid and strong base/ weak acid and weak base
They increase because you hear a lower frequency

22. The electrons emitted from cathode are replaced with what?
Cathode; anode
Electrons from anode and battery
+/- 1/2
B = pVg; density

23. What is Avagadro's number regarding ions/mol?
1000
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Polar
6.02 x 10^23 ions/mol

24. The square root of 10^anything is equal to what?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
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
The volume of the ice cube or whatever it is
Half of the exponent

25. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
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
Ability to locate an event in space
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)

26. Is the work done by air resistance - positive or negative?
Negative
Colligative; the number of solute particles present
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
The cross-sectional area through which the fluid flows

27. 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
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
V/m or N/C
They must balance

28. The freezing point of an aqueous solution is what kind of property? What does this mean?
180 degrees; when there is half a wave distance in phase between two waves
Negative
Colligative: it depends on the number of solute molecules in a given volume of water
A saturated solution in which the aqueous ions are in equilibrium with the solid

29. The basicity constant Kb measures what?
How strong a base is
Add them together
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
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

30. In order to guarantee a non-zero spin how many electrons are needed?
An odd number
Colligative: it depends on the number of solute molecules in a given volume of water
Constant to overcome the heat of fusion (solid to liquid state)
P = F(v) = mg(v -terminal)

31. Light can be carried along a distance within a transparent material by means of what?
0 Hz because they are traveling side by side at the same speed
Colligative: it depends on the number of solute molecules in a given volume of water
Total internal reflection
P = IV

32. Kb is the equilibrium constant for what?
Only temperature of the water bath
Energy
The reaction between the base and water
Going from solid to gas phase

33. 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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34. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
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
3+
[S][2S]^2 = 4S^3

35. The concentration of OH and H30 ions are approximately equal at what pH?
7 always!!!
When you have central atom with six ions on it
How strong a base is
The nucleus gains a proton and no neutrons

36. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
The path is longer on the inclined plane so it will take object longer to reach the bottom
W = F(displacement)
They do not differ
-l to +l

37. A plane mirror produces an image where?
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
No - it increases the speed at which the rxn reaches that equilibrium
At an equal distance behind it as the object is in front of the mirror
-l to +l

38. In general what is formed by an acid-base rxn?
At an equal distance behind it as the object is in front of the mirror
Negative
A salt and water
The particle's charge and the magnitude of the electric field

39. Hydrogen has what kind of standard oxidation or reduction potential?
Ability to locate an event in space
3+
Zero
0 Hz because they are traveling side by side at the same speed

40. What is the doppler equation for wavelength and frequency?
Positive
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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
Force times the distance over which the force acts

41. What kind of geometry is octahedral?
400 to 700 nm
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
You look at what is being oxidized and reduced in the problem
When you have central atom with six ions on it

42. In PV=nRT - if temp increases what will happen to volume?
It will increase as well because they are directly related - only if pressure is kept constant
Voltage
Yes - if the particle's trail is equidistant between two adjacent anodes
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

43. What is conserved in an inellastic collision?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Momentum
[S][2S]^2 = 4S^3
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

44. What is the magnetic quantum number?
-l to +l
Energy
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
That they are catalysts in the rxn because they react with the substrate and are reformed

45. 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?
Negative
Its twice that distance
It has a positive oxidation potential so it is easily oxidized
When HIn is turned into In- - which is dependent upon the pKa of the indicator

46. 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?
[S][2S]^2 = 4S^3
Positive
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
The nucleus gains a proton and no neutrons

47. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
The number of electrons emitted
Attractive molecular forces acting between material surfaces in contact
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
One mole of electric charge

48. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
+/- 1/2
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
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
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. How do you find length of time something is in flight? How do you find distance it traveled?
W = F(displacement)
How strong a base is
Positron because this is known as positron decay/electron capture
T = (2h/g)^1/2; distance = vt

50. Always remember that velocity has ____ and ____
Mag and direction
They increase because you hear a lower frequency
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
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R