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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 is the magnitude of the electric field produced by a point charge?
One that has more solute particles per liter of solution
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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
E = (kq)/r^2

2. The number of incident photons on the cathode affect what?
The number of electrons emitted
Strong acid and strong base/ weak acid and weak base
H = negative and S = positive
Mg

3. 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?
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
Electrons from anode and battery
Energy
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

4. How do you find moles of a substance when you are given faradays and electrons?
Faraday/electrons
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Energy
Sp^3

5. What kind of geometry is octahedral?
When all the external forces = zero
When you have central atom with six ions on it
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
The cross-sectional area through which the fluid flows

6. 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?
It can also equal 'mg'; the compressive strength of a substance
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
A salt and water

7. The closer the spacing of the anode wire - the better one can specify what?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
NO; reduction-oxidation
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
Where an event took place

8. 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?
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
No - it increases the speed at which the rxn reaches that equilibrium
It will be reduced the voltage produced by the resistor which means IR; E- IR
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

9. What is newton's second law?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Ability to locate an event in space
A constant force on a mass causes it to have a constant acceleration
That of static friction; there is a net accelerating force on the block once it starts to slide

10. Why does light travel slower in an optically dense medium than through a vacuum?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Colligative: it depends on the number of solute molecules in a given volume of water
It's weight = mg; h
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

11. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
Neutrons; atomic number
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Vertically; perpendicular to all surfaces
7 always!!!

12. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
An odd number
F = GMm/r^2
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Helium; 4

13. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
They do not differ
T = (2h/g)^1/2; distance = vt
Ability to locate an event in space
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

14. Beta decay is the same as what?
Mag and direction
The lowest whole number ratio of moles of each element in a mole of a cmpd
Positron emission
The lowest one

15. What is the magnetic quantum number?
-l to +l
It can also equal 'mg'; the compressive strength of a substance
Force times the distance over which the force acts
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

16. Acetic acid is a ______ solvent
-l to +l
One that has more solute particles per liter of solution
Polar
Positron emission

17. What is Newton's Universal Law of Gravitation?
F = GMm/r^2
Electrons from anode and battery
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Energy

18. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
Cathode; anode
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
Total internal reflection
It's weight = mg; the work would be the weight times the distance fell

19. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Positron because this is known as positron decay/electron capture
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Only temperature of the water bath

20. If you have circuit elements in parallel what is the same across them?
Electron shell number
Positron emission
Momentum
Voltage

21. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
3+
The lowest whole number ratio of moles of each element in a mole of a cmpd
Vertically; perpendicular to all surfaces
Mass number stays the same but the atomic number increases

22. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
They do not differ
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
A salt and water
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

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

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24. The freezing point of an aqueous solution is what kind of property? What does this mean?
Red
Colligative: it depends on the number of solute molecules in a given volume of water
H has a small atomic radius
The nucleus gains a proton and no neutrons

25. 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?
Mass number stays the same but the atomic number increases
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 has a positive oxidation potential so it is easily oxidized
[A]^a[B]^b

26. What is conserved in an inellastic collision?
Yes - if the particle's trail is equidistant between two adjacent anodes
Total internal reflection
Momentum
Electrons from anode and battery

27. The probability of an X-ray emission event at a given wavelength is measured by what?
Its intensity in the spectrum
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
6.02 x 10^23 ions/mol
(density[p])(volume)

28. What is the unit for Young's Modulus?
Pascal (N*m^2)
Positive
H has a small atomic radius
Constant to overcome the heat of fusion (solid to liquid state)

29. Why are bonds between H and another atom shorter compared to most?
Energy
+/- 1/2
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
H has a small atomic radius

30. What does the empirical formula show?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Its intensity in the spectrum
They increase because you hear a lower frequency
You look at what is being oxidized and reduced in the problem

31. What direction do gravity and bouyancy work? What direction does water pressure work?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
(+)
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

32. What is the equation for pressure?
+/- 1/2
Colligative: it depends on the number of solute molecules in a given volume of water
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Density (gravitational constant) height

33. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
Polar
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
It can absorb light that lets other electrons fill those orbitals
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

34. What is the formula for the power supplied by a battery to accelerate an electron beam?
It will increase as well because they are directly related - only if pressure is kept constant
P = IV
Mag and direction
Where an event took place

35. What is the law of conservation of linear momentum?
Mv = mv
A saturated solution in which the aqueous ions are in equilibrium with the solid
The element's mass number
Electron shell number

36. The visible spectrum ranges from ____ to _____
400 to 700 nm
Vertically; perpendicular to all surfaces
Gravity
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

37. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Accelerated by a higher voltage between the cathode and anode

38. The square root of 10^anything is equal to what?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
B = pVg; density
NO; reduction-oxidation
Half of the exponent

39. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
Alkali metals = first column
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
It has a positive oxidation potential so it is easily oxidized
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

40. What color is above 656 nm?
T = (2h/g)^1/2; distance = vt
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Red
A salt and water

41. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
Strong acid and strong base/ weak acid and weak base
That they are catalysts in the rxn because they react with the substrate and are reformed
Constant to overcome the heat of fusion (solid to liquid state)
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)

42. If temperature arises during a mixture what can you conclude about the enthalpy?
Negative
That it is negative
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
They are directly proportional

43. Is the work done by air resistance - positive or negative?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
180 degrees; when there is half a wave distance in phase between two waves
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Negative

44. The boiling point of a solution is what type of property? Which means is depends only on what?
Colligative; the number of solute particles present
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Its twice that distance
It has a positive oxidation potential so it is easily oxidized

45. What happens if an atom undergoes positron decay or electron capture?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
F = GMm/r^2
Attractive molecular forces acting between material surfaces in contact
It can absorb light that lets other electrons fill those orbitals

46. The free energy change (G) must be negative when what?
The reaction between the base and water
Total internal reflection
H = negative and S = positive
It will increase as well because they are directly related - only if pressure is kept constant

47. Heat from friction comes from what?
V/m or N/C
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Mass number stays the same but the atomic number increases
Decreasing potential energy

48. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Positive
Colligative; the number of solute particles present
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
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. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Energy
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

50. A floating ice cube implies that it's weight is balanced by what?
Isolating an atom from minerals by decomposing the minerals with an electric current
7 always!!!
The buoyant force on it; W = mg = pVg
E = (kq)/r^2