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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. What kind of metals react violently with water?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
It will increase as well because they are directly related - only if pressure is kept constant
Alkali metals = first column
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

2. What is the law of conservation of linear momentum?
Mv = mv
The volume of the ice cube or whatever it is
A constant force on a mass causes it to have a constant acceleration
They do not differ

3. Mechanical waves in a medium fxn to transport what?
Density (gravitational constant) height
Energy
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
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

4. In radioactive decay the atomic number (A) and mass number (Z) must what?
[A]^a[B]^b
They must balance
-l to +l
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

5. How many mL is in one liter?
Cathode; anode
That they are catalysts in the rxn because they react with the substrate and are reformed
Electron shell number
1000

6. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
7 always!!!
The density of the water and volume of the lead object
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
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

7. What is one faraday equal to?
One mole of electric charge
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
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
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

8. If you are given a table of substances and are told to find which two show effect of molecular weight on melting point alone - which two substances should you look for?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Mass number stays the same but the atomic number increases
It can also equal 'mg'; the compressive strength of a substance
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

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

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10. 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
Zero
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
That they are catalysts in the rxn because they react with the substrate and are reformed

11. What is the spin projection quantum number?
When all the external forces = zero
+/- 1/2
-l to +l
Ease of polarizability of the molecule and thus increasing molecular weight of mass

12. 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?
Half of the exponent
It has a positive oxidation potential so it is easily oxidized
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
The buoyant force on it; W = mg = pVg

13. Acetic acid is a ______ solvent
Polar
F =ma and F= qE
Helium; 4
Ease of polarizability of the molecule and thus increasing molecular weight of mass

14. What is the equation for work done?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
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
Constant to overcome the heat of fusion (solid to liquid state)
W = F(displacement)

15. The closer the spacing of the anode wire - the better one can specify what?
The number of electrons emitted
Zero
It will be reduced the voltage produced by the resistor which means IR; E- IR
Where an event took place

16. 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
Negative
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
The particle's charge and the magnitude of the electric field

17. The probability of an X-ray emission event at a given wavelength is measured by what?
An odd number
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
They increase because you hear a lower frequency
Its intensity in the spectrum

18. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
Voltage
Positive
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Sp^3

19. In order to increase the kinetic energy of electrons - they must be what?
Positron emission
Alkali metals = first column
Add them together
Accelerated by a higher voltage between the cathode and anode

20. What happens to a negatively charged particle put between two parallel plates?
Force times the distance over which the force acts
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
[S][2S]^2 = 4S^3
Strong acid and strong base/ weak acid and weak base

21. The concentration of OH and H30 ions are approximately equal at what pH?
Strong acid and strong base/ weak acid and weak base
Cathode; anode
A saturated solution in which the aqueous ions are in equilibrium with the solid
7 always!!!

22. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
Mv = mv
An odd number
The lowest one
The density of the water and volume of the lead object

23. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
1000
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
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

24. If you are given density and volume how do you find mass?
(density[p])(volume)
Momentum
-l to +l
(+)

25. What is sublimation?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
P = IV
Going from solid to gas phase
Neutrons; atomic number

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

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27. Is the work done by air resistance - positive or negative?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Negative
Half of the exponent
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

28. What is Newton's Universal Law of Gravitation?
-l to +l
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
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
F = GMm/r^2

29. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
E = (kq)/r^2
P = F(v) = mg(v -terminal)
It will be reduced the voltage produced by the resistor which means IR; E- IR
It decreases; the work done by the gas in expanding decreases its internal energy

30. What kind of geometry is octahedral?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
6.02 x 10^23 ions/mol
When you have central atom with six ions on it
The path is longer on the inclined plane so it will take object longer to reach the bottom

31. How do you find moles of a substance when you are given faradays and electrons?
Constant to overcome the heat of fusion (solid to liquid state)
Energy
Faraday/electrons
External components of the circuit

32. Nuclear masses can be approximated from what?

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33. What is the magnitude of the electric field produced by a point charge?
The current is the same
Accelerated by a higher voltage between the cathode and anode
E = (kq)/r^2
Going from solid to gas phase

34. A floating ice cube implies that it's weight is balanced by what?
They do not differ
Negative
Decreasing potential energy
The buoyant force on it; W = mg = pVg

35. The force on an electrical charge is what?
Polar
It can absorb light that lets other electrons fill those orbitals
F =ma and F= qE
Red

36. In Bohr model of atom when is energy emitted?
When electron falls from high energy to low energy level
The path is longer on the inclined plane so it will take object longer to reach the bottom
Its momentum is zero because velocity is zero; zero because of conservation of momentum
A constant force on a mass causes it to have a constant acceleration

37. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Density (gravitational constant) height
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
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Only temperature of the water bath

38. What direction do gravity and bouyancy work? What direction does water pressure work?
Vertically; perpendicular to all surfaces
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
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 momentum is zero because velocity is zero; zero because of conservation of momentum

39. 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?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Helium; 4
The cross-sectional area through which the fluid flows
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

40. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
Momentum
A saturated solution in which the aqueous ions are in equilibrium with the solid
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
It decreases; the work done by the gas in expanding decreases its internal energy

41. 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?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The path is longer on the inclined plane so it will take object longer to reach the bottom
6.02 x 10^23 ions/mol
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

42. In order to guarantee a non-zero spin how many electrons are needed?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
(+)
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
An odd number

43. The range of pH in which a color change takes place in a titration depends on what?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
The particle's charge and the magnitude of the electric field
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)
When HIn is turned into In- - which is dependent upon the pKa of the indicator

44. The boiling point of a solution is what type of property? Which means is depends only on what?
The lowest one
Colligative; the number of solute particles present
Faraday/electrons
6.02 x 10^23 ions/mol

45. Why does light travel slower in an optically dense medium than through a vacuum?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Mass number stays the same but the atomic number increases
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

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

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47. What kind of charge is on Al?
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
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
3+
One mole of electric charge

48. The phase difference corresponding to a half wave is what? When do you get destructive interference?
The density of the water and volume of the lead object
180 degrees; when there is half a wave distance in phase between two waves
A positron or electron; when atomic number goes up you know an electron has been emitted
+/- 1/2

49. If you have circuit elements in parallel what is the same across them?
Voltage
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
(+)

50. The square root of 10^anything is equal to what?
Half of the exponent
Positron emission
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Decreasing potential energy

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DSST Physical Sciences2

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