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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. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
It decreases; the work done by the gas in expanding decreases its internal energy
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

2. The Ksp for a substance of AaBb is what?
Mag and direction
[A]^a[B]^b
Positron emission
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

3. If you are given density and volume how do you find mass?
(density[p])(volume)
P = IV
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 lowest whole number ratio of moles of each element in a mole of a cmpd

4. What is the spin projection quantum number?
[A]^a[B]^b
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
+/- 1/2
Voltage

5. What is the doppler equation for wavelength and frequency?
Total internal reflection
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
In the presence of a base
The volume of the ice cube or whatever it is

6. If both weight and bouyant force are dependent on g - that makes g independent of what?
Mv = mv
The volume of the ice cube or whatever it is
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Half of the exponent

7. What color is above 656 nm?
It will be reduced the voltage produced by the resistor which means IR; E- IR
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Red
T = 2pi/angular velocity; v/r

8. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
The lowest one
When electron falls from high energy to low energy level
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
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

9. 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?
External components of the circuit
T = (2h/g)^1/2; distance = vt
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 of static friction; there is a net accelerating force on the block once it starts to slide

10. F in the Young's modulus equation can also equal what? What is E?

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11. What does spatial resolution refer to?
Ability to locate an event in space
Electron shell number
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
Sp^3

12. How do you find specific gravity of an object?
It decreases; the work done by the gas in expanding decreases its internal energy
When all the external forces = zero
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
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

13. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
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
A constant force on a mass causes it to have a constant acceleration
Gravity
Cathode; anode

14. What is one faraday equal to?
The path is longer on the inclined plane so it will take object longer to reach the bottom
A constant force on a mass causes it to have a constant acceleration
Red
One mole of electric charge

15. What is conserved in an inellastic collision?
Helium; 4
Momentum
Ability to locate an event in space
Positive

16. How do you balance redox rxns?

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17. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
[A]^a[B]^b
B = pVg; density
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Electrons from anode and battery

18. Beta decay is the emission of what? How do you know what it is the emission of?
A positron or electron; when atomic number goes up you know an electron has been emitted
Mass number stays the same but the atomic number increases
The reaction between the base and water
H = negative and S = positive

19. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
That they are catalysts in the rxn because they react with the substrate and are reformed
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)
1000
T = (2h/g)^1/2; distance = vt

20. In a rxn - how do you figure out which atom has the highest electron affinity?
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
It's weight = mg; h
V/m or N/C
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

21. 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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22. The freezing point of an aqueous solution is what kind of property? What does this mean?
It will be reduced the voltage produced by the resistor which means IR; E- IR
Colligative: it depends on the number of solute molecules in a given volume of water
The lowest one
They increase because you hear a lower frequency

23. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
A positron or electron; when atomic number goes up you know an electron has been emitted
Gravity
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)
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

24. What are the units of an electric field?
-l to +l
V/m or N/C
One mole of electric charge
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

25. Friction is caused by what?
It's weight = mg; the work would be the weight times the distance fell
Attractive molecular forces acting between material surfaces in contact
The lowest whole number ratio of moles of each element in a mole of a cmpd
It will increase as well because they are directly related - only if pressure is kept constant

26. What is usually conserved over oscillation periods?
One mole of electric charge
Its twice that distance
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Energy

27. How many mL is in one liter?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Mg
P = IV
1000

28. The coefficient of kinetic friction is always lower than what? Therefore what?
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)
-l to +l
That of static friction; there is a net accelerating force on the block once it starts to slide
An odd number

29. Is the work done by air resistance - positive or negative?
The particle's charge and the magnitude of the electric field
Negative
Add them together
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

30. What is the magnetic quantum number?
-l to +l
When electron falls from high energy to low energy level
Gravity
The density of the water and volume of the lead object

31. What does the empirical formula show?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Half of the exponent
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 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

32. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
One that has more solute particles per liter of solution
It's weight = mg; the work would be the weight times the distance fell
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Ability to locate an event in space

33. A pendulum moves under the influence of what?
External components of the circuit
Ability to locate an event in space
Gravity
Red

34. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
0 Hz because they are traveling side by side at the same speed
The path is longer on the inclined plane so it will take object longer to reach the bottom
The reaction between the base and water

35. Always remember that velocity has ____ and ____
When you have central atom with six ions on it
A saturated solution in which the aqueous ions are in equilibrium with the solid
F =ma and F= qE
Mag and direction

36. 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
The number of electrons emitted
Its momentum is zero because velocity is zero; zero because of conservation of momentum
400 to 700 nm

37. The range of pH in which a color change takes place in a titration depends on what?
Colligative; the number of solute particles present
V/m or N/C
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
When HIn is turned into In- - which is dependent upon the pKa of the indicator

38. What is the equation for work done?
It decreases; the work done by the gas in expanding decreases its internal energy
7 always!!!
W = F(displacement)
P = IV

39. Nuclear masses can be approximated from what?

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40. 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?
V/m or N/C
Alkali metals = first column
The density of the water and volume of the lead object
One mole of electric charge

41. Melting occurs at what type of temperature? Why?
The current is the same
Constant to overcome the heat of fusion (solid to liquid state)
E = (kq)/r^2
Cathode; anode

42. What is the equation for a period (T)? What is the equation for angular velocity?
An odd number
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The particle's charge and the magnitude of the electric field
T = 2pi/angular velocity; v/r

43. How do you find wavelength if you known distance from adjacent crests and troughs?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Its twice that distance
Faraday/electrons
When you have central atom with six ions on it

44. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
At an equal distance behind it as the object is in front of the mirror
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Faraday/electrons
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

45. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Positive
V/m or N/C
They increase because you hear a lower frequency
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

46. What kind of charge is on Al?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
That of static friction; there is a net accelerating force on the block once it starts to slide
H has a small atomic radius
3+

47. 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
Yes - if the particle's trail is equidistant between two adjacent anodes
Negative
When you have central atom with six ions on it

48. What is the principal quantum number (n)?
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
Neutrons; atomic number
Electron shell number
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

49. Mechanical waves in a medium fxn to transport what?
Yes - if the particle's trail is equidistant between two adjacent anodes
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Positron because this is known as positron decay/electron capture
Energy

50. What is the magnitude of the electric field produced by a point charge?
-l to +l
Ability to locate an event in space
Mag and direction
E = (kq)/r^2