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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.
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. 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?
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
Isolating an atom from minerals by decomposing the minerals with an electric current
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The cross-sectional area through which the fluid flows

2. Melting occurs at what type of temperature? Why?
Constant to overcome the heat of fusion (solid to liquid state)
The regular one
E = (kq)/r^2
The element's mass number

3. What is the magnetic quantum number?
One that has more solute particles per liter of solution
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
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
-l to +l

4. 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?
Total internal reflection
1000
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
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

5. 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
Electron shell number
P = F(v) = mg(v -terminal)
Where an event took place

6. What is the doppler equation for wavelength and frequency?
L = wavelength/2 so L= (wavelength)(2)
0 Hz because they are traveling side by side at the same speed
Electrons from anode and battery
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

7. If asked which electron configuration of an element is most stable which one do you choose?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Positron emission
No - it increases the speed at which the rxn reaches that equilibrium
The regular one

8. The number of incident photons on the cathode affect what?
400 to 700 nm
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
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 number of electrons emitted

9. What is the relationship between P and n in PV=nRT?
Ability to locate an event in space
+/- 1/2
180 degrees; when there is half a wave distance in phase between two waves
They are directly proportional

10. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Only temperature of the water bath
External components of the circuit
Accelerated by a higher voltage between the cathode and anode
L = wavelength/2 so L= (wavelength)(2)

11. When you are trying to find the buyoancy force of water on a lead object what density do you use in the equation B = pVg? what volume?
NO; reduction-oxidation
It can absorb light that lets other electrons fill those orbitals
The density of the water and volume of the lead object
That of static friction; there is a net accelerating force on the block once it starts to slide

12. A plane mirror produces an image where?
At an equal distance behind it as the object is in front of the mirror
W = F(displacement)
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

13. What is the amt of energy that a frictional force generates?
Decreasing potential energy
Force times the distance over which the force acts
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

14. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
The number of electrons emitted
When all the external forces = zero
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
Mass number stays the same but the atomic number increases

15. What is the equation for bouyant force? What is p?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
B = pVg; density
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

16. What is Newton's Universal Law of Gravitation?
Going from solid to gas phase
Momentum
F = GMm/r^2
W = F(displacement)

17. Mechanical waves in a medium fxn to transport what?
The element's mass number
The force along the board to the normal force
Energy
NO; reduction-oxidation

18. What kind of charge is on Al?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
At an equal distance behind it as the object is in front of the mirror
3+
Electrons from anode and battery

19. What is the spin projection quantum number?
Isolating an atom from minerals by decomposing the minerals with an electric current
+/- 1/2
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Strong acid and strong base/ weak acid and weak base

20. How would you find rate of rxn from pH 1 to pH2?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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
T = (2h/g)^1/2; distance = vt
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

21. When does red litmus paper turn blue?
When all the external forces = zero
The cross-sectional area through which the fluid flows
3+
In the presence of a base

22. Always remember that velocity has ____ and ____
In the presence of a base
The regular one
Positron emission
Mag and direction

23. In a healthy person standing at rest - a comparison of arterial blood pressure measured in the arm with that in the leg - shows what about the differences between these pressures?
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
Half of the exponent
-l to +l
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

24. Can a catalyst shift equilibrium?
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
[S][2S]^2 = 4S^3
Neutrons; atomic number
No - it increases the speed at which the rxn reaches that equilibrium

25. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Red
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
F =ma and F= qE
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

26. What is sublimation?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
The number of electrons emitted
Going from solid to gas phase
Electron shell number

27. The phase difference corresponding to a half wave is what? When do you get destructive interference?
P = F(v) = mg(v -terminal)
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
180 degrees; when there is half a wave distance in phase between two waves
Helium; 4

28. The basicity constant Kb measures what?
The force along the board to the normal force
How strong a base is
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
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

29. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
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
Total internal reflection
T = (2h/g)^1/2; distance = vt
It can absorb light that lets other electrons fill those orbitals

30. Beta decay is the emission of what? How do you know what it is the emission of?
When electron falls from high energy to low energy level
When all the external forces = zero
Cathode; anode
A positron or electron; when atomic number goes up you know an electron has been emitted

31. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
When all the external forces = zero
How strong a base is
Electron shell 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

32. Nuclear masses can be approximated from what?

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33. How do you figure out the literature Ksp value of a compound?
1000
A saturated solution in which the aqueous ions are in equilibrium with the solid
It's weight = mg; the work would be the weight times the distance fell
0 Hz because they are traveling side by side at the same speed

34. 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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35. 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
Cathode; anode
From peak to peak
It will increase as well because they are directly related - only if pressure is kept constant

36. The visible spectrum ranges from ____ to _____
An odd number
400 to 700 nm
They are directly proportional
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

37. What do electrolytic techniques involve?
Isolating an atom from minerals by decomposing the minerals with an electric current
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
Decreasing potential energy
When HIn is turned into In- - which is dependent upon the pKa of the indicator

38. The square root of 10^anything is equal to what?
Half of the exponent
External components of the circuit
The buoyant force on it; W = mg = pVg
400 to 700 nm

39. What is conserved in an inellastic collision?
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
Red
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Momentum

40. Kb is the equilibrium constant for what?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
The reaction between the base and water
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
The regular one

41. Acetic acid is a ______ solvent
Faraday/electrons
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Polar
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

42. How do you balance redox rxns?

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43. What is the magnitude of the electric field produced by a point charge?
Half of the exponent
E = (kq)/r^2
1000
Energy

44. What does spatial resolution refer to?
Momentum
H = negative and S = positive
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Ability to locate an event in space

45. For a given flow rate - the speed of fluid flow is inversely proportional to what?
They increase because you hear a lower frequency
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The force along the board to the normal force
The cross-sectional area through which the fluid flows

46. Regarding M(OH)2 and you have solubility (S) - what would the Ksp 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
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
[S][2S]^2 = 4S^3

47. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
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
It decreases; the work done by the gas in expanding decreases its internal energy
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

48. How do you find moles of a substance when you are given faradays and electrons?
Faraday/electrons
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
0 Hz because they are traveling side by side at the same speed
Its twice that distance

49. 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?
A positron or electron; when atomic number goes up you know an electron has been emitted
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
It decreases; the work done by the gas in expanding decreases its internal energy
(+)

50. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
One that has more solute particles per liter of solution
Half of the exponent
In the presence of a base
The volume of the ice cube or whatever it is