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DSST Physical Sciences2

Subjects : dsst, science

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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. How do you find length of time something is in flight? How do you find distance it traveled?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Sp^3
T = (2h/g)^1/2; distance = vt
H has a small atomic radius

2. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
The lowest one
0 Hz because they are traveling side by side at the same speed
L = wavelength/2 so L= (wavelength)(2)
Liquid displaced by that object

3. 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?
A positron or electron; when atomic number goes up you know an electron has been emitted
It can also equal 'mg'; the compressive strength of a substance
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
It will be reduced the voltage produced by the resistor which means IR; E- IR

4. Strength of dispersion force increases with what?
Strong acid and strong base/ weak acid and weak base
Zero
[A]^a[B]^b
Ease of polarizability of the molecule and thus increasing molecular weight of mass

5. What do electrolytic techniques involve?
P = F(v) = mg(v -terminal)
Isolating an atom from minerals by decomposing the minerals with an electric current
They increase because you hear a lower frequency
No - it increases the speed at which the rxn reaches that equilibrium

6. The total pressure of a solution is what? Give example.
They increase because you hear a lower frequency
Total internal reflection
How strong a base is
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

7. 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?
(+)
Ability to locate an event in space
It will be reduced the voltage produced by the resistor which means IR; E- IR
One mole of electric charge

8. When a falling mass is at terminal speed - what is the power expended by the air resistance?
180 degrees; when there is half a wave distance in phase between two waves
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 = F(v) = mg(v -terminal)
No - it increases the speed at which the rxn reaches that equilibrium

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

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10. Melting occurs at what type of temperature? Why?
The buoyant force on it; W = mg = pVg
Polar
Constant to overcome the heat of fusion (solid to liquid state)
T = (2h/g)^1/2; distance = vt

11. What is the amt of energy that a frictional force generates?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
0 Hz because they are traveling side by side at the same speed
Force times the distance over which the force acts
It decreases; the work done by the gas in expanding decreases its internal energy

12. The number of incident photons on the cathode affect what?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
The number of electrons 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
Colligative; the number of solute particles present

13. The coefficient of kinetic friction is always lower than what? Therefore what?
Voltage
That they are catalysts in the rxn because they react with the substrate and are reformed
That of static friction; there is a net accelerating force on the block once it starts to slide
When you have central atom with six ions on it

14. What is conserved in an inellastic collision?
Momentum
You look at what is being oxidized and reduced in the problem
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
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

15. Always remember that velocity has ____ and ____
Mag and direction
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
Going from solid to gas phase
When you have central atom with six ions on it

16. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
Colligative: it depends on the number of solute molecules in a given volume of water
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
V/m or N/C
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

17. What does spatial resolution refer to?
Pascal (N*m^2)
Ability to locate an event in space
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

18. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
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
External components of the circuit
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
No - it increases the speed at which the rxn reaches that equilibrium

19. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
3+
Mass number stays the same but the atomic number increases
Neutrons; atomic number
F = GMm/r^2

20. 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
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
[S][2S]^2 = 4S^3
How strong a base is

21. What color is above 656 nm?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Red
Strong acid and strong base/ weak acid and weak base
400 to 700 nm

22. What is the equation for a period (T)? What is the equation for angular velocity?
T = 2pi/angular velocity; v/r
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
It's weight = mg; the work would be the weight times the distance fell
The force along the board to the normal force

23. The basicity constant Kb measures what?
Strong acid and strong base/ weak acid and weak base
It will increase as well because they are directly related - only if pressure is kept constant
How strong a base is
Faraday/electrons

24. Terminal voltage is provided to what?
[S][2S]^2 = 4S^3
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 Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
External components of the circuit

25. Hydrogen has what kind of standard oxidation or reduction potential?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
L = wavelength/2 so L= (wavelength)(2)
Zero
Positive

26. 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
T = (2h/g)^1/2; distance = vt
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Polar

27. What kind of charge is on Al?
P = F(v) = mg(v -terminal)
3+
You look at what is being oxidized and reduced in the problem
When all the external forces = zero

28. What is weight equal to?
Mg
The current is the same
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Energy

29. If melting pt of a substance is 80 degrees - then what is the diff in time the substance melts when it is either placed in 100 degree test tube and 90 degree test tube?
That they are catalysts in the rxn because they react with the substrate and are reformed
Constant to overcome the heat of fusion (solid to liquid state)
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
1000

30. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
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
Its intensity in the spectrum
NO; reduction-oxidation
It's weight = mg; the work would be the weight times the distance fell

31. The volume of an object is equal to water?
H has a small atomic radius
Liquid displaced by that object
The regular one
When all the external forces = zero

32. In a rxn - how do you figure out which atom has the highest electron affinity?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
One that has more solute particles per liter of solution
T = 2pi/angular velocity; v/r
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

33. What is the principal quantum number (n)?
180 degrees; when there is half a wave distance in phase between two waves
Electron shell number
Mv = mv
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

34. In order to guarantee a non-zero spin how many electrons are needed?
That they are catalysts in the rxn because they react with the substrate and are reformed
An odd number
The cross-sectional area through which the fluid flows
When all the external forces = zero

35. The range of pH in which a color change takes place in a titration depends on what?
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
From peak to peak
When HIn is turned into In- - which is dependent upon the pKa of the indicator
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

36. What happens to a negatively charged particle put between two parallel plates?
Positron because this is known as positron decay/electron capture
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
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 experiences a constant electric force of qE and will thus accelerate towards the positive plate

37. 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?
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
(+)
That of static friction; there is a net accelerating force on the block once it starts to slide
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

38. When something is falling what is the force acting on it? Thus what would be the work done?

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39. 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?
Sp^3
Constant to overcome the heat of fusion (solid to liquid state)
It has a positive oxidation potential so it is easily oxidized
The density of the water and volume of the lead object

40. Acetic acid is a ______ solvent
A saturated solution in which the aqueous ions are in equilibrium with the solid
Polar
It will increase as well because they are directly related - only if pressure is kept constant
Pascal (N*m^2)

41. What direction do gravity and bouyancy work? What direction does water pressure work?
Electrons from anode and battery
The particle's charge and the magnitude of the electric field
H has a small atomic radius
Vertically; perpendicular to all surfaces

42. How would you find rate of rxn from pH 1 to pH2?
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
That they are catalysts in the rxn because they react with the substrate and are reformed
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Mag and direction

43. The visible spectrum ranges from ____ to _____
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
400 to 700 nm
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The volume of the ice cube or whatever it is

44. Beta decay is the same as what?
Positron emission
Faraday/electrons
Voltage
Accelerated by a higher voltage between the cathode and anode

45. When you are trying to calculate a galvanic cell's emf - what do you look at?
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
W = F(displacement)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
You look at what is being oxidized and reduced in the problem

46. The coefficient of static friction is the ratio of what?
Momentum
[A]^a[B]^b
The force along the board to the normal force
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

47. What energy conversion describes best what takes place in a battery-powered resistive circuit?
L = wavelength/2 so L= (wavelength)(2)
Positron emission
The buoyant force on it; W = mg = pVg
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

48. Can a catalyst shift equilibrium?
Positron because this is known as positron decay/electron capture
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)
H = negative and S = positive
No - it increases the speed at which the rxn reaches that equilibrium

49. 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 number of electrons emitted
Add them together
Mag and direction
External components of the circuit

50. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Faraday/electrons
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

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DSST Physical Sciences2

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