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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 direction do gravity and bouyancy work? What direction does water pressure work?
Vertically; perpendicular to all surfaces
Add them together
[S][2S]^2 = 4S^3
Electrons from anode and battery

2. 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
B = pVg; density
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Momentum

3. What is the spin projection quantum number?
+/- 1/2
Red
Momentum
The nucleus gains a proton and no neutrons

4. The concentration of OH and H30 ions are approximately equal at what pH?
The regular one
F = GMm/r^2
7 always!!!
Electrons from anode and battery

5. When does red litmus paper turn blue?
Vertically; perpendicular to all surfaces
The cross-sectional area through which the fluid flows
In the presence of a base
External components of the circuit

6. 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
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
In the presence of a base
Accelerated by a higher voltage between the cathode and anode

7. Light can be carried along a distance within a transparent material by means of what?
That they are catalysts in the rxn because they react with the substrate and are reformed
(density[p])(volume)
Total internal reflection
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

8. Kb is the equilibrium constant for what?
H = negative and S = positive
External components of the circuit
The reaction between the base and water
Vertically; perpendicular to all surfaces

9. Why are bonds between H and another atom shorter compared to most?
It will increase as well because they are directly related - only if pressure is kept constant
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
H has a small atomic radius
They do not differ

10. What does the empirical formula show?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Red
+/- 1/2
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

11. What is weight equal to?
Mg
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
P = IV
Neutrons; atomic number

12. What is the equation for work done?
When you have central atom with six ions on it
Alkali metals = first column
W = F(displacement)
180 degrees; when there is half a wave distance in phase between two waves

13. The boiling point of a solution is what type of property? Which means is depends only on what?
+/- 1/2
Colligative; the number of solute particles present
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
Electrons from anode and battery

14. How would you find rate of rxn from pH 1 to pH2?
[S][2S]^2 = 4S^3
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
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

15. The range of pH in which a color change takes place in a titration depends on what?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

16. What color is above 656 nm?
Helium; 4
Red
F =ma and F= qE
[S][2S]^2 = 4S^3

17. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Mg
External components of the circuit
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

18. Acetic acid is a ______ solvent
Polar
The element's mass number
Helium; 4
In the presence of a base

19. What is the angular momentum quantum number (l)? It is the same as what? What does an S orbital appear to look like? What would it's (l) be?
That of static friction; there is a net accelerating force on the block once it starts to slide
They are directly proportional
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
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

20. What kind of metals react violently with water?
The force along the board to the normal force
Sp^3
Alkali metals = first column
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

21. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Only temperature of the water bath
The nucleus gains a proton and no neutrons
Colligative; the number of solute particles present

22. What are the three separate module for tensile stress - shear stress - and compression/expansion?

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23. Beta decay is the same as what?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
When electron falls from high energy to low energy level
Positron emission
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

24. If you have circuit elements in parallel what is the same across them?
Colligative; the number of solute particles present
Voltage
You look at what is being oxidized and reduced in the problem
How strong a base is

25. The coefficient of static friction is the ratio of what?
The particle's charge and the magnitude of the electric field
The density of the water and volume of the lead object
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The force along the board to the normal force

26. In general what is formed by an acid-base rxn?
T = (2h/g)^1/2; distance = vt
Faraday/electrons
H = negative and S = positive
A salt and water

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

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28. Friction is caused by what?
A saturated solution in which the aqueous ions are in equilibrium with the solid
One that has more solute particles per liter of solution
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Attractive molecular forces acting between material surfaces in contact

29. What is the equation for bouyant force? What is p?
B = pVg; density
How strong a base is
Energy
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

30. The force on an electrical charge is what?
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)
F =ma and F= qE
Half of the exponent

31. 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?
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
Gravity
0 Hz because they are traveling side by side at the same speed
Add them together

32. Is the work done by air resistance - positive or negative?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Half of the exponent
Accelerated by a higher voltage between the cathode and anode
Negative

33. Why does light travel slower in an optically dense medium than through a vacuum?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
(density[p])(volume)
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
That it is negative

34. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
Half of the exponent
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
(density[p])(volume)
Gravity

35. What is the equation for a period (T)? What is the equation for angular velocity?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
T = 2pi/angular velocity; v/r
One that has more solute particles per liter of solution
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

36. 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?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
One that has more solute particles per liter of solution
The density of the water and volume of the lead object
It will increase as well because they are directly related - only if pressure is kept constant

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

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38. What if the circuit elements are in series?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The current is the same
Cathode; anode
A constant force on a mass causes it to have a constant acceleration

39. What does spatial resolution refer to?
V/m or N/C
They are directly proportional
Ability to locate an event in space
A positron or electron; when atomic number goes up you know an electron has been emitted

40. 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?
Isolating an atom from minerals by decomposing the minerals with an electric current
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
7 always!!!
It has a positive oxidation potential so it is easily oxidized

41. Mechanical waves in a medium fxn to transport what?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Where an event took place
7 always!!!
Energy

42. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
It decreases; the work done by the gas in expanding decreases its internal energy
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
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
A salt and water

43. When you are trying to calculate a galvanic cell's emf - what do you look at?
Alkali metals = first column
The particle's charge and the magnitude of the electric field
Yes - if the particle's trail is equidistant between two adjacent anodes
You look at what is being oxidized and reduced in the problem

44. What is a metathesis rxn?
The density of the water and volume of the lead object
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
Neutrons; atomic number
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

45. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
Positron because this is known as positron decay/electron capture
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Isolating an atom from minerals by decomposing the minerals with an electric current
The particle's charge and the magnitude of the electric field

46. Always remember that velocity has ____ and ____
Mag and direction
Its intensity in the spectrum
Momentum
Mv = mv

47. The square root of 10^anything is equal to 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
Half of the exponent
Electron shell number
T = (2h/g)^1/2; distance = vt

48. 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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49. What is newton's second law?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
A constant force on a mass causes it to have a constant acceleration
(density[p])(volume)
A salt and water

50. In Bohr model of atom when is energy emitted?
T = (2h/g)^1/2; distance = vt
When electron falls from high energy to low energy level
A positron or electron; when atomic number goes up you know an electron has been emitted
Energy