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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.
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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. The freezing point of an aqueous solution is what kind of property? What does this mean?
Where an event took place
Colligative: it depends on the number of solute molecules in a given volume of water
3+
Vertically; perpendicular to all surfaces

2. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
Sp^3
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
They increase because you hear a lower frequency
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

3. What kind of geometry is octahedral?
A positron or electron; when atomic number goes up you know an electron has been emitted
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
When you have central atom with six ions on it
Energy

4. What does the empirical formula show?
The volume of the ice cube or whatever it is
An odd number
The lowest whole number ratio of moles of each element in a mole of a cmpd
Decreasing potential energy

5. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
It can also equal 'mg'; the compressive strength of a substance
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The lowest one
They are directly proportional

6. Light can be carried along a distance within a transparent material by means of what?
Total internal reflection
Mag and direction
Positron emission
F = GMm/r^2

7. Melting occurs at what type of temperature? Why?
Constant to overcome the heat of fusion (solid to liquid state)
The element's mass number
An odd 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

8. Always remember that velocity has ____ and ____
Mass number stays the same but the atomic number increases
The cross-sectional area through which the fluid flows
They do not differ
Mag and direction

9. The electrical force on a particle depends on what?

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10. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
L = wavelength/2 so L= (wavelength)(2)
Mass number stays the same but the atomic number increases
Ease of polarizability of the molecule and thus increasing molecular weight of mass
When you have central atom with six ions on it

11. What energy conversion describes best what takes place in a battery-powered resistive circuit?
An odd number
It has a positive oxidation potential so it is easily oxidized
That it is negative
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

12. A floating ice cube implies that it's weight is balanced by what?
Total internal reflection
The buoyant force on it; W = mg = pVg
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Density (gravitational constant) height

13. Acetic acid is a ______ solvent
The force along the board to the normal force
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
F = GMm/r^2
Polar

14. What is sublimation?
[A]^a[B]^b
Mass number stays the same but the atomic number increases
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
Going from solid to gas phase

15. In a rxn - how do you figure out which atom has the highest electron affinity?
Liquid displaced by that 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
The number of electrons emitted
Yes - if the particle's trail is equidistant between two adjacent anodes

16. In order to guarantee a non-zero spin how many electrons are needed?
Momentum
An odd number
The density of the water and volume of the lead object
Polar

17. How do you find length of time something is in flight? How do you find distance it traveled?
T = (2h/g)^1/2; distance = vt
[A]^a[B]^b
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
180 degrees; when there is half a wave distance in phase between two waves

18. Is the work done by air resistance - positive or negative?
F =ma and F= qE
(+)
The regular one
Negative

19. What is the spin projection quantum number?
They must balance
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
+/- 1/2
W = F(displacement)

20. The concentration of OH and H30 ions are approximately equal at what pH?
7 always!!!
Positron because this is known as positron decay/electron capture
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
The particle's charge and the magnitude of the electric field

21. 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?
Add them together
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
H = negative and S = positive
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

22. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
Faraday/electrons
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
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
P = F(v) = mg(v -terminal)

23. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
The regular one
Where an event took place
Sp^3
In the presence of a base

24. The visible spectrum ranges from ____ to _____
400 to 700 nm
T = (2h/g)^1/2; distance = vt
They do not differ
Add them together

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

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26. When is a body in translational equilibrium?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
When all the external forces = zero
It will be reduced the voltage produced by the resistor which means IR; E- IR
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

27. Neither N2 or O2 have a permanent what? What does this mean?
The particle's charge and the magnitude of the electric field
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
E = (kq)/r^2

28. What is the equation for bouyant force? What is p?
NO; reduction-oxidation
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
B = pVg; density
Positive

29. Terminal voltage is provided to what?
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
External components of the circuit
Helium; 4
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

30. What direction do gravity and bouyancy work? What direction does water pressure work?
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
Vertically; perpendicular to all surfaces
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
W = F(displacement)

31. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
B = pVg; density
T = (2h/g)^1/2; distance = vt
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
They do not differ

32. What is the equation for work done?
Its intensity in the spectrum
W = F(displacement)
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
Sp^3

33. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
It can absorb light that lets other electrons fill those orbitals
Half of the exponent
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Mg

34. What are the units of an electric field?
It can also equal 'mg'; the compressive strength of a substance
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
180 degrees; when there is half a wave distance in phase between two waves
V/m or N/C

35. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
Electron shell number
The reaction between the base and water
It decreases; the work done by the gas in expanding decreases its internal energy
P = F(v) = mg(v -terminal)

36. What is the magnitude of the electric field produced by a point charge?
E = (kq)/r^2
3+
[A]^a[B]^b
H has a small atomic radius

37. Equivalent mass is what?
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
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
You look at what is being oxidized and reduced in the problem
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

38. What is usually conserved over oscillation periods?
F = GMm/r^2
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Energy

39. What is weight equal to?
Mg
That they are catalysts in the rxn because they react with the substrate and are reformed
Red
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)

40. What is newton's second law?
A constant force on a mass causes it to have a constant acceleration
[S][2S]^2 = 4S^3
One mole of electric charge
Its intensity in the spectrum

41. The force on an electrical charge is what?
No - it increases the speed at which the rxn reaches that equilibrium
F =ma and F= qE
The volume of the ice cube or whatever it is
Density (gravitational constant) height

42. What is Newton's Universal Law of Gravitation?
Momentum
F = GMm/r^2
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Half of the exponent

43. What is the unit for Young's Modulus?
Pascal (N*m^2)
The path is longer on the inclined plane so it will take object longer to reach the bottom
400 to 700 nm
L = wavelength/2 so L= (wavelength)(2)

44. The probability of an X-ray emission event at a given wavelength is measured by what?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Its intensity in the spectrum
Where an event took place
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

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

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46. Beta decay is the same as what?
Constant to overcome the heat of fusion (solid to liquid state)
Positron emission
Red
They increase because you hear a lower frequency

47. What kind of metals react violently with water?
Alkali metals = first column
Where an event took place
No - it increases the speed at which the rxn reaches that equilibrium
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

48. 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
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
In the presence of a base
They increase because you hear a lower frequency

49. Nuclear masses can be approximated from what?

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50. The electrons emitted from cathode are replaced with what?
Electrons from anode and battery
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 blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure