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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. What does spatial resolution refer to?
Ability to locate an event in space
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)
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
Decreasing potential energy

2. Strength of dispersion force increases with what?
0 Hz because they are traveling side by side at the same speed
Ease of polarizability of the molecule and thus increasing molecular weight of mass
It decreases; the work done by the gas in expanding decreases its internal energy
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

3. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
A constant force on a mass causes it to have a constant acceleration
NO; reduction-oxidation
From peak to peak
The density of the water and volume of the lead object

4. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
The element's mass number
T = 2pi/angular velocity; v/r
Density (gravitational constant) height
The lowest one

5. The force on an electrical charge is what?
Energy
It can absorb light that lets other electrons fill those orbitals
Colligative; the number of solute particles present
F =ma and F= qE

6. If both weight and bouyant force are dependent on g - that makes g independent of what?
7 always!!!
B = pVg; density
The volume of the ice cube or whatever it is
They are directly proportional

7. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
Mass number stays the same but the atomic number increases
Energy
Electrons from anode and battery
They do not differ

8. 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
(density[p])(volume)
Its momentum is zero because velocity is zero; zero because of conservation of momentum
From peak to peak

9. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
Accelerated by a higher voltage between the cathode and anode
Yes - if the particle's trail is equidistant between two adjacent anodes
Cathode; anode
When HIn is turned into In- - which is dependent upon the pKa of the indicator

10. When does red litmus paper turn blue?
6.02 x 10^23 ions/mol
Positron because this is known as positron decay/electron capture
The buoyant force on it; W = mg = pVg
In the presence of a base

11. 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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12. The range of pH in which a color change takes place in a titration depends on what?
Mv = mv
When HIn is turned into In- - which is dependent upon the pKa of the indicator
7 always!!!
The path is longer on the inclined plane so it will take object longer to reach the bottom

13. 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?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
The regular one
Add them together
B = pVg; density

14. How do you find wavelength if you known distance from adjacent crests and troughs?
Voltage
The regular one
Its twice that distance
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

15. 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
That of static friction; there is a net accelerating force on the block once it starts to slide
180 degrees; when there is half a wave distance in phase between two waves
Mass number stays the same but the atomic number increases

16. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
Zero
Colligative: it depends on the number of solute molecules in a given volume of water
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
W = F(displacement)

17. What is the doppler equation for wavelength and frequency?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Voltage
How strong a base is
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

18. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
Positron because this is known as positron decay/electron capture
Force times the distance over which the force acts
Colligative; the number of solute particles present
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

19. What happens to a negatively charged particle put between two parallel plates?
3+
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
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

20. The equivalence pt is what part of the titration curve? Thus looking at the range of change between the pH values along this part of the graph can tell you what?

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21. If the equation says that the E^o has (-) voltage when being reduced - but it is being oxidized in the problem - what does the voltage then become?
E = (kq)/r^2
A constant force on a mass causes it to have a constant acceleration
(+)
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

22. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
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
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
L = wavelength/2 so L= (wavelength)(2)
The nucleus gains a proton and no neutrons

23. What color is above 656 nm?
A positron or electron; when atomic number goes up you know an electron has been emitted
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
Red
It's weight = mg; h

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

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25. What are the units of an electric field?
P = F(v) = mg(v -terminal)
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
V/m or N/C
F =ma and F= qE

26. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Colligative; the number of solute particles present
It will increase as well because they are directly related - only if pressure is kept constant
The cross-sectional area through which the fluid flows

27. 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
The lowest whole number ratio of moles of each element in a mole of a cmpd
In the presence of a base
The particle's charge and the magnitude of the electric field

28. What is the amt of energy that a frictional force generates?
Force times the distance over which the force acts
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
0 Hz because they are traveling side by side at the same speed
Electron shell number

29. If the source of sound and the listener are traveling side by side at the same speed - what will the change in freq heard by the listener be?
0 Hz because they are traveling side by side at the same speed
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Zero
External components of the circuit

30. The closer the spacing of the anode wire - the better one can specify what?
The reaction between the base and water
Its intensity in the spectrum
Where an event took place
When all the external forces = zero

31. What is the unit for Young's Modulus?
400 to 700 nm
B = pVg; density
Pascal (N*m^2)
The number of electrons emitted

32. 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
Alkali metals = first column
P = F(v) = mg(v -terminal)
180 degrees; when there is half a wave distance in phase between two waves

33. The square root of 10^anything is equal to 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
That they are catalysts in the rxn because they react with the substrate and are reformed
Half of the exponent
Positron because this is known as positron decay/electron capture

34. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
The element's mass number
Helium; 4
Its intensity in the spectrum

35. Friction is caused by what?
H = negative and S = positive
It can also equal 'mg'; the compressive strength of a substance
Attractive molecular forces acting between material surfaces in contact
That of static friction; there is a net accelerating force on the block once it starts to slide

36. Why are bonds between H and another atom shorter compared to most?
B = pVg; density
When electron falls from high energy to low energy level
H has a small atomic radius
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

37. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
The path is longer on the inclined plane so it will take object longer to reach the bottom
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
From peak to peak
Sp^3

38. 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?
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
How strong a base is
When all the external forces = zero
1000

39. The visible spectrum ranges from ____ to _____
400 to 700 nm
The volume of the ice cube or whatever it is
A saturated solution in which the aqueous ions are in equilibrium with the solid
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

40. Kb is the equilibrium constant for what?
F =ma and F= qE
The reaction between the base and water
Colligative; the number of solute particles present
Mv = mv

41. If temperature arises during a mixture what can you conclude about the enthalpy?
It's weight = mg; the work would be the weight times the distance fell
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Alkali metals = first column
That it is negative

42. How do you find moles of a substance when you are given faradays and electrons?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
The volume of the ice cube or whatever it is
The lowest one
Faraday/electrons

43. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
They are directly proportional
6.02 x 10^23 ions/mol
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

44. 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
L = wavelength/2 so L= (wavelength)(2)
Energy
It decreases; the work done by the gas in expanding decreases its internal energy

45. What happens if an atom undergoes positron decay or electron capture?
The buoyant force on it; W = mg = pVg
The force along the board to the normal force
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Alkali metals = first column

46. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Where an event took place
Alkali metals = first column
Helium; 4
The volume of the ice cube or whatever it is

47. What is the spin projection quantum number?
Voltage
Helium; 4
+/- 1/2
Negative

48. How do you find length of time something is in flight? How do you find distance it traveled?
Vertically; perpendicular to all surfaces
No - it increases the speed at which the rxn reaches that equilibrium
T = (2h/g)^1/2; distance = vt
How strong a base is

49. Nuclear masses can be approximated from what?

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50. 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?
The buoyant force on it; W = mg = pVg
From peak to peak
Energy
Its momentum is zero because velocity is zero; zero because of conservation of momentum