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. The number of incident photons on the cathode affect what?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
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
(density[p])(volume)
The number of electrons emitted


2. A plane mirror produces an image where?
At an equal distance behind it as the object is in front of the mirror
Isolating an atom from minerals by decomposing the minerals with an electric current
F =ma and F= qE
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. What is the spin projection quantum number?
E = (kq)/r^2
Electron shell number
+/- 1/2
180 degrees; when there is half a wave distance in phase between two waves


4. If you are given density and volume how do you find mass?
Strong acid and strong base/ weak acid and weak base
The density of the water and volume of the lead object
(density[p])(volume)
Light is absorbed and re-emitted by the atomic structure of the optically dense medium


5. If temperature arises during a mixture what can you conclude about the enthalpy?
They must balance
It can absorb light that lets other electrons fill those orbitals
That it is negative
W = F(displacement)


6. What is the equation for a period (T)? What is the equation for angular velocity?
T = 2pi/angular velocity; v/r
Momentum
Red
It will increase as well because they are directly related - only if pressure is kept constant


7. The temperature of a metal will not increase above its melting point until what?
H = negative and S = positive
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
The number of electrons emitted
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting


8. Friction is caused by what?
Attractive molecular forces acting between material surfaces in contact
It's weight = mg; the work would be the weight times the distance fell
Mag and direction
The mass number stays the number but the atomic number decreases by one - usually resulting in another element


9. The square root of 10^anything is equal to what?
Half of the exponent
Decreasing potential energy
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
P = F(v) = mg(v -terminal)


10. Isotopes have diff number of ______ but same what?
Neutrons; atomic number
The lowest one
Decreasing potential energy
H = negative and S = positive


11. What is weight equal to?
That it is negative
Mg
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water


12. A pendulum moves under the influence of what?
Gravity
When electron falls from high energy to low energy level
The number of electrons emitted
It experiences a constant electric force of qE and will thus accelerate towards the positive plate


13. What is the equation for work done?
W = F(displacement)
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
A positron or electron; when atomic number goes up you know an electron has been emitted
The element's mass number


14. What does spatial resolution refer to?
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
Total internal reflection
Ability to locate an event in space
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water


15. How do you balance redox rxns?

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16. What kind of charge is on Al?
External components of the circuit
Electrons from anode and battery
3+
Sp^3


17. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
That it is negative
The lowest one
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
Isolating an atom from minerals by decomposing the minerals with an electric current


18. F in the Young's modulus equation can also equal what? What is E?

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19. What is Avagadro's number regarding ions/mol?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
The density of the water and volume of the lead object
6.02 x 10^23 ions/mol
The mass number stays the number but the atomic number decreases by one - usually resulting in another element


20. In order to guarantee a non-zero spin how many electrons are needed?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
How strong a base is
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
An odd number


21. What is the law of conservation of linear momentum?
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 will increase as well because they are directly related - only if pressure is kept constant
They increase because you hear a lower frequency
Mv = mv


22. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
The element's mass number
Yes - if the particle's trail is equidistant between two adjacent anodes
The nucleus gains a proton and no neutrons


23. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
[S][2S]^2 = 4S^3
Yes - if the particle's trail is equidistant between two adjacent anodes
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors


24. The coefficient of static friction is the ratio of what?
You look at what is being oxidized and reduced in the problem
Vertically; perpendicular to all surfaces
The force along the board to the normal force
The buoyant force on it; W = mg = pVg


25. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
From peak to peak
No - it increases the speed at which the rxn reaches that equilibrium
They do not differ
Cathode; anode


26. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Neutrons; atomic number
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Helium; 4
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R


27. If you have circuit elements in parallel what is the same across them?
H has a small atomic radius
Sp^3
It will be reduced the voltage produced by the resistor which means IR; E- IR
Voltage


28. Can a catalyst shift equilibrium?
Mass number stays the same but the atomic number increases
The element's mass number
No - it increases the speed at which the rxn reaches that equilibrium
Its momentum is zero because velocity is zero; zero because of conservation of momentum


29. What is sublimation?
Going from solid to gas phase
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)
Voltage
+/- 1/2


30. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
They do not differ
E = (kq)/r^2
Energy
Only temperature of the water bath


31. The freezing point of an aqueous solution is what kind of property? What does this mean?
T = 2pi/angular velocity; v/r
Colligative: it depends on the number of solute molecules in a given volume of water
Half of the exponent
Going from solid to gas phase


32. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
Positron because this is known as positron decay/electron capture
The nucleus gains a proton and no neutrons
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
NO; reduction-oxidation


33. What kind of metals react violently with water?
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
Alkali metals = first column
The lowest one
Light is absorbed and re-emitted by the atomic structure of the optically dense medium


34. The force on an electrical charge is what?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Cathode; anode
F =ma and F= qE
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


35. The basicity constant Kb measures what?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
How strong a base is
Electrons from anode and battery
F = GMm/r^2


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

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37. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
-l to +l
It decreases; the work done by the gas in expanding decreases its internal energy


38. 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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39. If asked which electron configuration of an element is most stable which one do you choose?
Force times the distance over which the force acts
It will increase as well because they are directly related - only if pressure is kept constant
The regular one
When you have central atom with six ions on it


40. What is the magnetic quantum number?
[A]^a[B]^b
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
-l to +l
Colligative; the number of solute particles present


41. 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?
Positive
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
6.02 x 10^23 ions/mol
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure


42. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Helium; 4
Add them together
T = 2pi/angular velocity; v/r
When HIn is turned into In- - which is dependent upon the pKa of the indicator


43. 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
It's weight = mg; the work would be the weight times the distance fell
7 always!!!
(density[p])(volume)


44. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
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
Force times the distance over which the force acts
It decreases; the work done by the gas in expanding decreases its internal energy
400 to 700 nm


45. What is Newton's Universal Law of Gravitation?
F = GMm/r^2
Colligative; the number of solute particles present
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Faraday/electrons


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

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47. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
That they are catalysts in the rxn because they react with the substrate and are reformed
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
[S][2S]^2 = 4S^3
The regular one


48. The total pressure of a solution is what? Give example.
Mass number stays the same but the atomic number increases
W = F(displacement)
Positive
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


49. 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?
The current is the same
It's weight = mg; h
At an equal distance behind it as the object is in front of the mirror
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)


50. In a rxn - how do you figure out which atom has the highest electron affinity?
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
The number of electrons emitted
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