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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.
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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 does spatial resolution refer to?
Ability to locate an event in space
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
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
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

2. If you have circuit elements in parallel what is the same across them?
The density of the water and volume of the lead object
When electron falls from high energy to low energy level
Colligative: it depends on the number of solute molecules in a given volume of water
Voltage

3. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
Positron emission
They do not differ
That it is negative
Faraday/electrons

4. Kb is the equilibrium constant for what?
Ability to locate an event in space
It will increase as well because they are directly related - only if pressure is kept constant
The reaction between the base and water
0 Hz because they are traveling side by side at the same speed

5. Melting occurs at what type of temperature? Why?
[S][2S]^2 = 4S^3
Constant to overcome the heat of fusion (solid to liquid state)
Negative
The nucleus gains a proton and no neutrons

6. In PV=nRT - if temp increases what will happen to volume?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
A constant force on a mass causes it to have a constant acceleration
It will increase as well because they are directly related - only if pressure is kept constant
Gravity

7. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
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
Colligative; the number of solute particles present
Liquid displaced by that object

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

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9. Hydrogen has what kind of standard oxidation or reduction potential?
Zero
Negative
Colligative: it depends on the number of solute molecules in a given volume of water
The number of electrons emitted

10. Light can be carried along a distance within a transparent material by means of what?
It will increase as well because they are directly related - only if pressure is kept constant
Colligative; the number of solute particles present
V/m or N/C
Total internal reflection

11. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
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
The nucleus gains a proton and no neutrons
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

12. In Bohr model of atom when is energy emitted?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Colligative: it depends on the number of solute molecules in a given volume of water
When electron falls from high energy to low energy level
T = (2h/g)^1/2; distance = vt

13. Can a catalyst shift equilibrium?
180 degrees; when there is half a wave distance in phase between two waves
The nucleus gains a proton and no neutrons
The volume of the ice cube or whatever it is
No - it increases the speed at which the rxn reaches that equilibrium

14. When an element decreases its atomic number by one what is emitted?
Positron because this is known as positron decay/electron capture
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
It will be reduced the voltage produced by the resistor which means IR; E- IR
Yes - if the particle's trail is equidistant between two adjacent anodes

15. In order to guarantee a non-zero spin how many electrons are needed?
The force along the board to the normal force
You look at what is being oxidized and reduced in the problem
An odd number
The lowest one

16. What direction do gravity and bouyancy work? What direction does water pressure work?
Vertically; perpendicular to all surfaces
Add them together
Mass number stays the same but the atomic number increases
It decreases; the work done by the gas in expanding decreases its internal energy

17. Strength of dispersion force increases with what?
No - it increases the speed at which the rxn reaches that equilibrium
0 Hz because they are traveling side by side at the same speed
L = wavelength/2 so L= (wavelength)(2)
Ease of polarizability of the molecule and thus increasing molecular weight of mass

18. Heat from friction comes from what?
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
That it is negative
The current is the same
Decreasing potential energy

19. In radioactive decay the atomic number (A) and mass number (Z) must what?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
When all the external forces = zero
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
They must balance

20. Isotopes have diff number of ______ but same what?
Positive
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Neutrons; atomic number
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. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
It decreases; the work done by the gas in expanding decreases its internal energy
The path is longer on the inclined plane so it will take object longer to reach the bottom
V/m or N/C
Mass number stays the same but the atomic number increases

22. At the moment of explosion of an object - what is its momementum? Why? After an explosion what is the total momentum carried by all the fragments?
NO; reduction-oxidation
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

23. Half-sine wave shape is what kind of wavelength with regards to length?
L = wavelength/2 so L= (wavelength)(2)
Neutrons; atomic number
T = 2pi/angular velocity; v/r
Pascal (N*m^2)

24. A floating ice cube implies that it's weight is balanced by what?
They are directly proportional
Liquid displaced by that object
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
The buoyant force on it; W = mg = pVg

25. Terminal voltage is provided to what?
A saturated solution in which the aqueous ions are in equilibrium with the solid
When all the external forces = zero
External components of the circuit
The density of the water and volume of the lead object

26. The freezing point of an aqueous solution is what kind of property? What does this mean?
Colligative: it depends on the number of solute molecules in a given volume of water
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
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)

27. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
It's weight = mg; the work would be the weight times the distance fell
One that has more solute particles per liter of solution
Faraday/electrons
Mass number stays the same but the atomic number increases

28. What kind of geometry is octahedral?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
When all the external forces = zero
V/m or N/C
When you have central atom with six ions on it

29. Always remember that velocity has ____ and ____
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
(density[p])(volume)
Mag and direction
The cross-sectional area through which the fluid flows

30. What is the equation for bouyant force? What is p?
B = pVg; density
Energy
Yes - if the particle's trail is equidistant between two adjacent anodes
The particle's charge and the magnitude of the electric field

31. What is the equation for pressure?
Isolating an atom from minerals by decomposing the minerals with an electric current
It has a positive oxidation potential so it is easily oxidized
Density (gravitational constant) height
B = pVg; density

32. Neither N2 or O2 have a permanent what? What does this mean?
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
0 Hz because they are traveling side by side at the same speed
When electron falls from high energy to low energy level

33. How should the period of a waveform be calculated?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Vertically; perpendicular to all surfaces
Attractive molecular forces acting between material surfaces in contact
From peak to peak

34. Is the work done by air resistance - positive or negative?
(density[p])(volume)
The particle's charge and the magnitude of the electric field
Negative
It's weight = mg; h

35. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
Voltage
Momentum
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

36. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
It's weight = mg; h
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
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
Vertically; perpendicular to all surfaces

37. What are the units of an electric field?
V/m or N/C
Positron because this is known as positron decay/electron capture
1000
You look at what is being oxidized and reduced in the problem

38. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
From peak to peak
T = (2h/g)^1/2; distance = vt
They increase because you hear a lower frequency

39. A saturated solution of KNO3 means what? If you add salt that has any of these two ions what will happen? What is this called?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Its twice that distance
It can also equal 'mg'; the compressive strength of a substance
E = (kq)/r^2

40. What is one faraday equal to?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Neutrons; atomic number
One mole of electric charge
Total internal reflection

41. The temperature of a metal will not increase above its melting point until what?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Total internal reflection
The number of electrons emitted

42. The coefficient of static friction is the ratio of what?
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
Mv = mv
The lowest whole number ratio of moles of each element in a mole of a cmpd
The force along the board to the normal force

43. What if the circuit elements are in series?
The current is the same
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
Strong acid and strong base/ weak acid and weak base
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

44. Beta decay is the emission of what? How do you know what it is the emission of?
Strong acid and strong base/ weak acid and weak base
When all the external forces = zero
A positron or electron; when atomic number goes up you know an electron has been emitted
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

45. In a rxn - how do you figure out which atom has the highest electron affinity?
The element's mass number
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
When you have central atom with six ions on it
Polar

46. 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
Total internal reflection
That they are catalysts in the rxn because they react with the substrate and are reformed
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

47. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
Neutrons; atomic number
It can absorb light that lets other electrons fill those orbitals
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
H = negative and S = positive

48. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Helium; 4
The nucleus gains a proton and no neutrons
Mv = mv
One that has more solute particles per liter of solution

49. The force on an electrical charge is what?
The buoyant force on it; W = mg = pVg
(+)
F =ma and F= qE
Momentum

50. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Colligative: it depends on the number of solute molecules in a given volume of water
Ease of polarizability of the molecule and thus increasing molecular weight of mass