DSST Physical Sciences2

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. A pendulum moves under the influence of what?
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
Gravity
When all the external forces = zero


2. How do you find wavelength if you known distance from adjacent crests and troughs?
H has a small atomic radius
A salt and water
Its twice that distance
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


3. The number of incident photons on the cathode affect what?
It has a positive oxidation potential so it is easily oxidized
The number of electrons emitted
Its momentum is zero because velocity is zero; zero because of conservation of momentum
-l to +l


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

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5. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
They increase because you hear a lower frequency
The density of the water and volume of the lead object
7 always!!!
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


6. 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
Force times the distance over which the force acts
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Half of the exponent


7. If temperature arises during a mixture what can you conclude about the enthalpy?
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
That it is negative
It has a positive oxidation potential so it is easily oxidized


8. 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?
It can also equal 'mg'; the compressive strength of a substance
It's weight = mg; h
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


9. If asked which electron configuration of an element is most stable which one do you choose?
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
Momentum
The regular one
A saturated solution in which the aqueous ions are in equilibrium with the solid


10. The square root of 10^anything is equal to what?
Isolating an atom from minerals by decomposing the minerals with an electric current
It can also equal 'mg'; the compressive strength of a substance
Half of the exponent
P = F(v) = mg(v -terminal)


11. What type of acid and base would produce a pH closest to 7?
(+)
W = F(displacement)
Strong acid and strong base/ weak acid and weak base
It experiences a constant electric force of qE and will thus accelerate towards the positive plate


12. What is the principal quantum number (n)?
1000
Electron shell number
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Vertically; perpendicular to all surfaces


13. In Bohr model of atom when is energy emitted?
P = IV
F =ma and F= qE
When electron falls from high energy to low energy level
Energy


14. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Positive
Ease of polarizability of the molecule and thus increasing molecular weight of mass
You look at what is being oxidized and reduced in the problem


15. What do electrolytic techniques involve?
Force times the distance over which the force acts
Isolating an atom from minerals by decomposing the minerals with an electric current
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous


16. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
Ability to locate an event in space
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Yes - if the particle's trail is equidistant between two adjacent anodes
Electrons from anode and battery


17. What is sublimation?
Electron shell number
The lowest whole number ratio of moles of each element in a mole of a cmpd
Going from solid to gas phase
B = pVg; density


18. 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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19. Kb is the equilibrium constant for what?
The reaction between the base and water
Red
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
Alkali metals = first column


20. The phase difference corresponding to a half wave is what? When do you get destructive interference?
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
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
180 degrees; when there is half a wave distance in phase between two waves
Isolating an atom from minerals by decomposing the minerals with an electric current


21. The free energy change (G) must be negative when what?
F =ma and F= qE
H = negative and S = positive
P = IV
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


22. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
The lowest one
In the presence of a base
A positron or electron; when atomic number goes up you know an electron has been emitted
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


23. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
When you have central atom with six ions on it
That they are catalysts in the rxn because they react with the substrate and are reformed
3+
The cross-sectional area through which the fluid flows


24. Can a charged particle be detected by two anodes?

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25. If you have a decrease of pressure to which side of the equation is it equilibrium shifted towards? What about if you increase temperature?

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26. What kind of metals react violently with water?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
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
Alkali metals = first column
E = (kq)/r^2


27. Is the work done by air resistance - positive or negative?
It can absorb light that lets other electrons fill those orbitals
Negative
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
In the presence of a base


28. The concentration of OH and H30 ions are approximately equal at what pH?
It can absorb light that lets other electrons fill those orbitals
7 always!!!
The buoyant force on it; W = mg = pVg
Alkali metals = first column


29. What is the spin projection quantum number?
Isolating an atom from minerals by decomposing the minerals with an electric current
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
The reaction between the base and water
+/- 1/2


30. 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
The nucleus gains a proton and no neutrons
Yes - if the particle's trail is equidistant between two adjacent anodes
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


31. 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?
It's weight = mg; the work would be the weight times the distance fell
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
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
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)


32. What is different between an inclined plane and free fall?
Accelerated by a higher voltage between the cathode and anode
(density[p])(volume)
Constant to overcome the heat of fusion (solid to liquid state)
The path is longer on the inclined plane so it will take object longer to reach the bottom


33. Friction is caused by what?
Attractive molecular forces acting between material surfaces in contact
When all the external forces = zero
Colligative: it depends on the number of solute molecules in a given volume of water
7 always!!!


34. A floating ice cube implies that it's weight is balanced by what?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
The current is the same
The buoyant force on it; W = mg = pVg


35. How do you balance redox rxns?

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36. The total pressure of a solution is what? Give example.
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
Add them together
You look at what is being oxidized and reduced in the problem
+/- 1/2


37. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
It will increase as well because they are directly related - only if pressure is kept constant
F =ma and F= qE
NO; reduction-oxidation
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


38. Half-sine wave shape is what kind of wavelength with regards to length?
Yes - if the particle's trail is equidistant between two adjacent anodes
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Attractive molecular forces acting between material surfaces in contact
L = wavelength/2 so L= (wavelength)(2)


39. 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?
(+)
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Its intensity in the spectrum
The force along the board to the normal force


40. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
+/- 1/2
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
They must balance
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous


41. 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?
P = F(v) = mg(v -terminal)
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Add them together


42. What is the equation for work done?
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
W = F(displacement)
The path is longer on the inclined plane so it will take object longer to reach the bottom


43. What is usually conserved over oscillation periods?
Energy
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
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
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus


44. In order to guarantee a non-zero spin how many electrons are needed?
An odd number
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
W = F(displacement)
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


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

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46. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
Faraday/electrons
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
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


47. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
Mag and direction
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
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
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R


48. 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?
That of static friction; there is a net accelerating force on the block once it starts to slide
T = (2h/g)^1/2; distance = vt
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 lowest whole number ratio of moles of each element in a mole of a cmpd


49. What is the amt of energy that a frictional force generates?
Negative
Force times the distance over which the force acts
Faraday/electrons
6.02 x 10^23 ions/mol


50. What is the magnitude of the electric field produced by a point charge?
NO; reduction-oxidation
When electron falls from high energy to low energy level
Helium; 4
E = (kq)/r^2