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. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
That it is negative
The density of the water and volume of the lead object
0 Hz because they are traveling side by side at the same speed
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


2. A saturated solution of KNO3 means what? If you add salt that has any of these two ions what will happen? What is this called?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
It's weight = mg; h
Colligative; the number of solute particles present
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles


3. What is the equation for pressure?
7 always!!!
Total internal reflection
Density (gravitational constant) height
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio


4. What is the formula for the power supplied by a battery to accelerate an electron beam?
B = pVg; density
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
That they are catalysts in the rxn because they react with the substrate and are reformed
P = IV


5. Friction is caused by what?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Attractive molecular forces acting between material surfaces in contact
1000
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens


6. How do you find wavelength if you known distance from adjacent crests and troughs?
Isolating an atom from minerals by decomposing the minerals with an electric current
Its twice that distance
[A]^a[B]^b
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


7. Strength of dispersion force increases with what?
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
Ease of polarizability of the molecule and thus increasing molecular weight of mass
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
When all the external forces = zero


8. Half-sine wave shape is what kind of wavelength with regards to length?
L = wavelength/2 so L= (wavelength)(2)
Half of the exponent
The lowest one
H has a small atomic radius


9. When is a body in translational equilibrium?
When all the external forces = zero
It will be reduced the voltage produced by the resistor which means IR; E- IR
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
They increase because you hear a lower frequency


10. How do you balance redox rxns?

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11. Melting occurs at what type of temperature? Why?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Positron because this is known as positron decay/electron capture
Constant to overcome the heat of fusion (solid to liquid state)


12. Mechanical waves in a medium fxn to transport what?
The buoyant force on it; W = mg = pVg
Energy
Its intensity in the spectrum
It can also equal 'mg'; the compressive strength of a substance


13. What is the unit for Young's Modulus?
A positron or electron; when atomic number goes up you know an electron has been emitted
Pascal (N*m^2)
Add them together
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant


14. A pendulum moves under the influence of what?
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
Gravity
Its momentum is zero because velocity is zero; zero because of conservation of momentum
A positron or electron; when atomic number goes up you know an electron has been emitted


15. For a given flow rate - the speed of fluid flow is inversely proportional to what?
Voltage
The cross-sectional area through which the fluid flows
The volume of the ice cube or whatever it is
The lowest one


16. What is the equation for bouyant force? What is p?
Constant to overcome the heat of fusion (solid to liquid state)
T = 2pi/angular velocity; v/r
B = pVg; density
Half of the exponent


17. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
An odd number
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)
It can absorb light that lets other electrons fill those orbitals


18. Equivalent mass is what?
One that has more solute particles per liter of solution
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 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
Its twice that distance


19. How do you find specific gravity of an object?
B = pVg; density
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
One that has more solute particles per liter of solution
Polar


20. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
It can absorb light that lets other electrons fill those orbitals
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
A positron or electron; when atomic number goes up you know an electron has been emitted
F = GMm/r^2


21. In a rxn - how do you figure out which atom has the highest electron affinity?
Yes - if the particle's trail is equidistant between two adjacent anodes
That it is negative
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
When all the external forces = zero


22. What is the relationship between P and n in PV=nRT?
Alkali metals = first column
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
The number of electrons emitted
They are directly proportional


23. What is the amt of energy that a frictional force generates?
A positron or electron; when atomic number goes up you know an electron has been emitted
Force times the distance over which the force acts
Isolating an atom from minerals by decomposing the minerals with an electric current
Light is absorbed and re-emitted by the atomic structure of the optically dense medium


24. What would the force be of a block on a pulley? What would be its displacement?

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25. 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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26. 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
External components of the circuit
They do not differ
Cathode; anode


27. The free energy change (G) must be negative when what?
Only temperature of the water bath
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
H = negative and S = positive
+/- 1/2


28. What is the equation for work done?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
W = F(displacement)
When you have central atom with six ions on it
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


29. In radioactive decay the atomic number (A) and mass number (Z) must what?
The current is the same
They must balance
Force times the distance over which the force acts
The element's mass number


30. When you are trying to calculate a galvanic cell's emf - what do you look at?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
You look at what is being oxidized and reduced in the problem
Yes - if the particle's trail is equidistant between two adjacent anodes
How strong a base is


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

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32. 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?
Sp^3
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
When all the external forces = zero
(+)


33. What is the equation for a period (T)? What is the equation for angular velocity?
1000
Sp^3
T = 2pi/angular velocity; v/r
When HIn is turned into In- - which is dependent upon the pKa of the indicator


34. Always remember that velocity has ____ and ____
Half of the exponent
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)
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
Mag and direction


35. Terminal voltage is provided to what?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
External components of the circuit
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Voltage


36. What is usually conserved over oscillation periods?
Energy
The reaction between the base and water
Neutrons; atomic number
Cathode; anode


37. If temperature arises during a mixture what can you conclude about the enthalpy?
That it is negative
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 force along the board to the normal force
Only temperature of the water bath


38. How do you figure out the literature Ksp value of a compound?
The reaction between the base and water
400 to 700 nm
(+)
A saturated solution in which the aqueous ions are in equilibrium with the solid


39. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
7 always!!!
Going from solid to gas phase


40. The square root of 10^anything is equal to what?
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
NO; reduction-oxidation
From peak to peak
Half of the exponent


41. Can a catalyst shift equilibrium?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
They do not differ
No - it increases the speed at which the rxn reaches that equilibrium
The lowest whole number ratio of moles of each element in a mole of a cmpd


42. The force on an electrical charge is what?
180 degrees; when there is half a wave distance in phase between two waves
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
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
F =ma and F= qE


43. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
W = F(displacement)
Positive
How strong a base is


44. The phase difference corresponding to a half wave is what? When do you get destructive interference?
180 degrees; when there is half a wave distance in phase between two waves
The current is the same
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Mv = mv


45. 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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46. 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?
7 always!!!
Its twice that distance
0 Hz because they are traveling side by side at the same speed
Only temperature of the water bath


47. Acetic acid is a ______ solvent
Half of the exponent
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Polar
1000


48. What does spatial resolution refer to?
A constant force on a mass causes it to have a constant acceleration
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Ability to locate an event in space
Its momentum is zero because velocity is zero; zero because of conservation of momentum


49. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
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
Faraday/electrons
Gravity


50. If you have circuit elements in parallel what is the same across them?
The volume of the ice cube or whatever it is
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Energy
Voltage