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DSST Physical Sciences2

Subjects : dsst, science

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. Kb is the equilibrium constant for what?
The reaction between the base and water
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Negative
The regular one

2. Is the work done by air resistance - positive or negative?
Negative
Total internal reflection
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
Its intensity in the spectrum

3. So if you are given an equation and it gives you the E^o for both side equations seen in the big equation - what do you do with them?
In the presence of a base
Add them together
Liquid displaced by that object
Attractive molecular forces acting between material surfaces in contact

4. Why are bonds between H and another atom shorter compared to most?
H has a small atomic radius
0 Hz because they are traveling side by side at the same speed
It decreases; the work done by the gas in expanding decreases its internal energy
Its momentum is zero because velocity is zero; zero because of conservation of momentum

5. What is the equation for a period (T)? What is the equation for angular velocity?
T = 2pi/angular velocity; v/r
Its intensity in the spectrum
Positron because this is known as positron decay/electron capture
Mv = mv

6. What is the principal quantum number (n)?
Decreasing potential energy
Electron shell number
It's weight = mg; the work would be the weight times the distance fell
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

7. How do you find wavelength if you known distance from adjacent crests and troughs?
Its twice that distance
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
The lowest whole number ratio of moles of each element in a mole of a cmpd
The density of the water and volume of the lead object

8. What type of acid and base would produce a pH closest to 7?
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
Strong acid and strong base/ weak acid and weak base
Cathode; anode
Positive

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

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10. What kind of charge is on Al?
Electrons from anode and battery
3+
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
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

11. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
When you have central atom with six ions on it
Its intensity in the spectrum
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
It can absorb light that lets other electrons fill those orbitals

12. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
Voltage
T = (2h/g)^1/2; distance = vt
400 to 700 nm

13. If you are given density and volume how do you find mass?
(density[p])(volume)
P = IV
The reaction between the base and water
A constant force on a mass causes it to have a constant acceleration

14. How do you balance redox rxns?

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15. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Sp^3
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Cathode; anode

16. How do you figure out the literature Ksp value of a compound?
A saturated solution in which the aqueous ions are in equilibrium with the solid
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
External components of the circuit
When you have central atom with six ions on it

17. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
B = pVg; density
Constant to overcome the heat of fusion (solid to liquid state)
Only temperature of the water bath
Gravity

18. 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?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
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
Alkali metals = first column
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

19. What is different between an inclined plane and free fall?
The nucleus gains a proton and no neutrons
The path is longer on the inclined plane so it will take object longer to reach the bottom
Positron because this is known as positron decay/electron capture
3+

20. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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
It can also equal 'mg'; the compressive strength of a substance

21. Why does light travel slower in an optically dense medium than through a vacuum?
It will increase as well because they are directly related - only if pressure is kept constant
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
A constant force on a mass causes it to have a constant acceleration

22. The Ksp for a substance of AaBb is what?
[A]^a[B]^b
Mass number stays the same but the atomic number increases
That they are catalysts in the rxn because they react with the substrate and are reformed
180 degrees; when there is half a wave distance in phase between two waves

23. What kind of geometry is octahedral?
The force along the board to the normal force
Voltage
Constant to overcome the heat of fusion (solid to liquid state)
When you have central atom with six ions on it

24. How do you find length of time something is in flight? How do you find distance it traveled?
The lowest one
In the presence of a base
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
T = (2h/g)^1/2; distance = vt

25. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
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 increase as well because they are directly related - only if pressure is kept constant
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

26. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
Mass number stays the same but the atomic number increases
T = 2pi/angular velocity; v/r
(+)
They do not differ

27. What happens to a negatively charged particle put between two parallel plates?
That they are catalysts in the rxn because they react with the substrate and are reformed
The density of the water and volume of the lead object
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
They do not differ

28. Acetic acid is a ______ solvent
A positron or electron; when atomic number goes up you know an electron has been emitted
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
400 to 700 nm
Polar

29. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
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
One that has more solute particles per liter of solution
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
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

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

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31. The free energy change (G) must be negative when what?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
External components of the circuit
H = negative and S = positive
It can absorb light that lets other electrons fill those orbitals

32. What is usually conserved over oscillation periods?
T = 2pi/angular velocity; v/r
Energy
They are directly proportional
That they are catalysts in the rxn because they react with the substrate and are reformed

33. 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
The buoyant force on it; W = mg = pVg
1000
Mag and direction

34. Always remember that velocity has ____ and ____
Mag and direction
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
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
A constant force on a mass causes it to have a constant acceleration

35. So if you have a voltage of 1/4V it will be reduced by what? Thus what will be the equation for the terminal voltage?
Half of the exponent
Liquid displaced by that object
When you have central atom with six ions on it
It will be reduced the voltage produced by the resistor which means IR; E- IR

36. The square root of 10^anything is equal to what?
The cross-sectional area through which the fluid flows
Cathode; anode
Pascal (N*m^2)
Half of the exponent

37. 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
Red
Alkali metals = first column
Neutrons; atomic number

38. 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
0 Hz because they are traveling side by side at the same speed
Total internal reflection
When HIn is turned into In- - which is dependent upon the pKa of the indicator

39. For a given flow rate - the speed of fluid flow is inversely proportional to what?
The volume of the ice cube or whatever it is
W = F(displacement)
The cross-sectional area through which the fluid flows
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

40. What are the units of an electric field?
Red
V/m or N/C
It has a positive oxidation potential so it is easily oxidized
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

41. What is one faraday equal to?
One that has more solute particles per liter of solution
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 lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
One mole of electric charge

42. What direction do gravity and bouyancy work? What direction does water pressure work?
Vertically; perpendicular to all surfaces
Only temperature of the water bath
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
They are directly proportional

43. The boiling point of a solution is what type of property? Which means is depends only on what?
H = negative and S = positive
It will be reduced the voltage produced by the resistor which means IR; E- IR
Mv = mv
Colligative; the number of solute particles present

44. The probability of an X-ray emission event at a given wavelength is measured by what?
That they are catalysts in the rxn because they react with the substrate and are reformed
Its intensity in the spectrum
P = IV
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

45. What is newton's second law?
Yes - if the particle's trail is equidistant between two adjacent anodes
You look at what is being oxidized and reduced in the problem
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 constant force on a mass causes it to have a constant acceleration

46. What if the circuit elements are in series?
The current is the same
You look at what is being oxidized and reduced in the problem
Liquid displaced by that object
The density of the water and volume of the lead object

47. When does red litmus paper turn blue?
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
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
In the presence of a base
The volume of the ice cube or whatever it is

48. What is the amt of energy that a frictional force generates?
Mass number stays the same but the atomic number increases
Force times the distance over which the force acts
A saturated solution in which the aqueous ions are in equilibrium with the solid
Isolating an atom from minerals by decomposing the minerals with an electric current

49. What does the empirical formula show?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
The lowest whole number ratio of moles of each element in a mole of a cmpd
H = negative and S = positive

50. If you are given a table of substances and are told to find which two show effect of molecular weight on melting point alone - which two substances should you look for?
Where an event took place
Force times the distance over which the force acts
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Liquid displaced by that object