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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. Can a catalyst shift equilibrium?
Total internal reflection
T = (2h/g)^1/2; distance = vt
Colligative: it depends on the number of solute molecules in a given volume of water
No - it increases the speed at which the rxn reaches that equilibrium

2. What is conserved in an inellastic collision?
That they are catalysts in the rxn because they react with the substrate and are reformed
Momentum
Electron shell number
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

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

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4. The square root of 10^anything is equal to what?
Half of the exponent
Momentum
Cathode; anode
Isolating an atom from minerals by decomposing the minerals with an electric current

5. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
Density (gravitational constant) height
That they are catalysts in the rxn because they react with the substrate and are reformed
One that has more solute particles per liter of solution
It can absorb light that lets other electrons fill those orbitals

6. 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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7. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
1000
When all the external forces = zero
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
P = IV

8. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
In the presence of a base
[S][2S]^2 = 4S^3
Vertically; perpendicular to all surfaces
You look at what is being oxidized and reduced in the problem

9. What direction do gravity and bouyancy work? What direction does water pressure work?
Its twice that distance
The force along the board to the normal force
The cross-sectional area through which the fluid flows
Vertically; perpendicular to all surfaces

10. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Voltage
Only temperature of the water bath
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
When electron falls from high energy to low energy level

11. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
Gravity
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The lowest one
External components of the circuit

12. Mechanical waves in a medium fxn to transport what?
400 to 700 nm
An odd number
Energy
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

13. The Ksp for a substance of AaBb is what?
Positron emission
A positron or electron; when atomic number goes up you know an electron has been emitted
[A]^a[B]^b
Half of the exponent

14. 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?
It can absorb light that lets other electrons fill those orbitals
Momentum
Gravity
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

15. The free energy change (G) must be negative when 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
H = negative and S = positive
It will be reduced the voltage produced by the resistor which means IR; E- IR
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

16. What is the equation for a period (T)? What is the equation for angular velocity?
7 always!!!
B = pVg; density
Alkali metals = first column
T = 2pi/angular velocity; v/r

17. Isotopes have diff number of ______ but same what?
Density (gravitational constant) height
(+)
Neutrons; atomic number
Energy

18. If you have circuit elements in parallel what is the same across them?
L = wavelength/2 so L= (wavelength)(2)
Voltage
7 always!!!
A constant force on a mass causes it to have a constant acceleration

19. 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?
Mv = mv
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
From peak to peak
6.02 x 10^23 ions/mol

20. In order to guarantee a non-zero spin how many electrons are needed?
An odd number
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
Add them together
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

21. What is Avagadro's number regarding ions/mol?
In the presence of a base
Isolating an atom from minerals by decomposing the minerals with an electric current
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
6.02 x 10^23 ions/mol

22. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The regular one
Negative
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Mag and direction

23. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
Add them together
Sp^3
It decreases; the work done by the gas in expanding decreases its internal energy
Pascal (N*m^2)

24. What is the magnitude of the electric field produced by a point charge?
F = GMm/r^2
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
E = (kq)/r^2
The lowest whole number ratio of moles of each element in a mole of a cmpd

25. Strength of dispersion force increases with what?
Positive
The number of electrons emitted
The regular one
Ease of polarizability of the molecule and thus increasing molecular weight of mass

26. How do you find specific gravity of an object?
When electron falls from high energy to low energy level
Where an event took place
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 lowest whole number ratio of moles of each element in a mole of a cmpd

27. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
H has a small atomic radius
The number of electrons emitted
Helium; 4

28. What is the unit for Young's Modulus?
1000
Pascal (N*m^2)
P = F(v) = mg(v -terminal)
Mv = mv

29. Equivalent mass is what?
Its twice that distance
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
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
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

30. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
When electron falls from high energy to low energy level
Positive
Pascal (N*m^2)
That of static friction; there is a net accelerating force on the block once it starts to slide

31. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
It decreases; the work done by the gas in expanding decreases its internal energy
-l to +l
L = wavelength/2 so L= (wavelength)(2)
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

32. What is the principal quantum number (n)?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Electron shell number
Neutrons; atomic number
How strong a base is

33. When you are trying to calculate a galvanic cell's emf - what do you look at?
You look at what is being oxidized and reduced in the problem
Energy
Only temperature of the water bath
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

34. Always remember that velocity has ____ and ____
The lowest one
It will be reduced the voltage produced by the resistor which means IR; E- IR
Mag and direction
Mg

35. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
Density (gravitational constant) height
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
They increase because you hear a lower frequency
A constant force on a mass causes it to have a constant acceleration

36. What is newton's second law?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
They must balance
A constant force on a mass causes it to have a constant acceleration
Yes - if the particle's trail is equidistant between two adjacent anodes

37. What is the magnetic quantum number?
The reaction between the base and water
-l to +l
The current is the same
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

38. In Bohr model of atom when is energy emitted?
Constant to overcome the heat of fusion (solid to liquid state)
When HIn is turned into In- - which is dependent upon the pKa of the indicator
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
When electron falls from high energy to low energy level

39. What is the doppler equation for wavelength and frequency?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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
How strong a base is
Neutrons; atomic number

40. Hydrogen has what kind of standard oxidation or reduction potential?
Positive
Mv = mv
Zero
One that has more solute particles per liter of solution

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

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42. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
That they are catalysts in the rxn because they react with the substrate and are reformed
F =ma and F= qE
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

43. Half-sine wave shape is what kind of wavelength with regards to length?
Energy
L = wavelength/2 so L= (wavelength)(2)
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Electron shell number

44. The coefficient of static friction is the ratio of what?
It will be reduced the voltage produced by the resistor which means IR; E- IR
Gravity
The force along the board to the normal force
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

45. 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?
V/m or N/C
Half of the exponent
It will be reduced the voltage produced by the resistor which means IR; E- IR
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

46. How should the period of a waveform be calculated?
A positron or electron; when atomic number goes up you know an electron has been emitted
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
From peak to peak
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

47. 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
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
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

48. The volume of an object is equal to water?
[S][2S]^2 = 4S^3
It's weight = mg; the work would be the weight times the distance fell
Liquid displaced by that object
The density of the water and volume of the lead object

49. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
It decreases; the work done by the gas in expanding decreases its internal energy
The current is the same
Add them together
Only temperature of the water bath

50. What does spatial resolution refer to?
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 cmpd without the O cannot donate H's like alcohol can to form H bonds with water
A salt and water
Ability to locate an event in space