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. Half-sine wave shape is what kind of wavelength with regards to length?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Sp^3
One mole of electric charge
L = wavelength/2 so L= (wavelength)(2)


2. What is the magnitude of the electric field produced by a point charge?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
+/- 1/2
You look at what is being oxidized and reduced in the problem
E = (kq)/r^2


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

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4. Can a catalyst shift equilibrium?
V/m or N/C
Its momentum is zero because velocity is zero; zero because of conservation of momentum
No - it increases the speed at which the rxn reaches that equilibrium
It's weight = mg; h


5. In a rxn - how do you figure out which atom has the highest electron affinity?
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
In the presence of a base
Liquid displaced by that object
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


6. The Ksp for a substance of AaBb is what?
(+)
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
They must balance
[A]^a[B]^b


7. Neither N2 or O2 have a permanent what? What does this mean?
How strong a base is
[A]^a[B]^b
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Its twice that distance


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

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9. What is the formula for the power supplied by a battery to accelerate an electron beam?
P = F(v) = mg(v -terminal)
Strong acid and strong base/ weak acid and weak base
P = IV
Add them together


10. The square root of 10^anything is equal to what?
It can absorb light that lets other electrons fill those orbitals
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Half of the exponent
NO; reduction-oxidation


11. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
Constant to overcome the heat of fusion (solid to liquid state)
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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
Its intensity in the spectrum


12. 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
Attractive molecular forces acting between material surfaces in contact
Faraday/electrons
Sp^3


13. If both weight and bouyant force are dependent on g - that makes g independent of 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
Where an event took place
Neutrons; atomic number
The volume of the ice cube or whatever it is


14. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
The force along the board to the normal force
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
They are directly proportional
H = negative and S = positive


15. How do you balance redox rxns?

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16. What kind of geometry is octahedral?
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)
From peak to peak
When you have central atom with six ions on it
Positron because this is known as positron decay/electron capture


17. What is different between an inclined plane and free fall?
Mass number stays the same but the atomic number increases
Its intensity in the spectrum
Electrons from anode and battery
The path is longer on the inclined plane so it will take object longer to reach the bottom


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

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19. 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?
(+)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
The volume of the ice cube or whatever it is
That it is negative


20. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
[A]^a[B]^b
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
One that has more solute particles per liter of solution
Voltage


21. 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
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
Colligative: it depends on the number of solute molecules in a given volume of water
A saturated solution in which the aqueous ions are in equilibrium with the solid


22. 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?
The density of the water and volume of the lead object
E = (kq)/r^2
A saturated solution in which the aqueous ions are in equilibrium with the solid
The regular one


23. Isotopes have diff number of ______ but same what?
You look at what is being oxidized and reduced in the problem
The lowest whole number ratio of moles of each element in a mole of a cmpd
Neutrons; atomic number
Accelerated by a higher voltage between the cathode and anode


24. Strength of dispersion force increases with what?
The particle's charge and the magnitude of the electric field
Accelerated by a higher voltage between the cathode and anode
Ease of polarizability of the molecule and thus increasing molecular weight of mass
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect


25. In PV=nRT - if temp increases what will happen to volume?
Where an event took place
It will increase as well because they are directly related - only if pressure is kept constant
That of static friction; there is a net accelerating force on the block once it starts to slide
Ability to locate an event in space


26. 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?
Add them together
How strong a base is
Cathode; anode
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)


27. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Sp^3
They are directly proportional
It's weight = mg; h
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


28. What is the equation for work done?
The density of the water and volume of the lead object
Add them together
Alkali metals = first column
W = F(displacement)


29. Kb is the equilibrium constant for what?
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
Colligative; the number of solute particles present
Where an event took place
The reaction between the base and water


30. What is one faraday equal to?
One mole of electric charge
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)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
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


31. How do you figure out the literature Ksp value of a compound?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Red
The particle's charge and the magnitude of the electric field
A saturated solution in which the aqueous ions are in equilibrium with the solid


32. 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?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
How strong a base is
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Negative


33. What is the unit for Young's Modulus?
Pascal (N*m^2)
Momentum
V/m or N/C
No - it increases the speed at which the rxn reaches that equilibrium


34. What is the equation for bouyant force? What is p?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
One mole of electric charge
You look at what is being oxidized and reduced in the problem
B = pVg; density


35. How should the period of a waveform be calculated?
Density (gravitational constant) height
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Positron because this is known as positron decay/electron capture
From peak to peak


36. The electrical force on a particle depends on what?

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37. The range of pH in which a color change takes place in a titration depends on what?
No - it increases the speed at which the rxn reaches that equilibrium
When HIn is turned into In- - which is dependent upon the pKa of the indicator
P = F(v) = mg(v -terminal)
The particle's charge and the magnitude of the electric field


38. Beta decay is the same as what?
Positron emission
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Momentum


39. What happens if an atom undergoes positron decay or electron capture?
When electron falls from high energy to low energy level
Half of the exponent
Zero
The mass number stays the number but the atomic number decreases by one - usually resulting in another element


40. Beta decay is the emission of what? How do you know what it is the emission of?
A positron or electron; when atomic number goes up you know an electron has been emitted
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
A constant force on a mass causes it to have a constant acceleration
An odd number


41. The phase difference corresponding to a half wave is what? When do you get destructive interference?
Faraday/electrons
The number of electrons emitted
180 degrees; when there is half a wave distance in phase between two waves
6.02 x 10^23 ions/mol


42. How do you find 'g' from Newton's law of gravity?
Total internal reflection
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Voltage
Ability to locate an event in space


43. If asked which electron configuration of an element is most stable which one do you choose?
E = (kq)/r^2
Helium; 4
B = pVg; density
The regular one


44. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
The nucleus gains a proton and no neutrons
Negative
Mag and direction
Constant to overcome the heat of fusion (solid to liquid state)


45. In order to guarantee a non-zero spin how many electrons are needed?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
The path is longer on the inclined plane so it will take object longer to reach the bottom
An odd number
H has a small atomic radius


46. Why does light travel slower in an optically dense medium than through a vacuum?
When you have central atom with six ions on it
In the presence of a base
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2


47. What is the amt of energy that a frictional force generates?
They are directly proportional
The lowest whole number ratio of moles of each element in a mole of a cmpd
Force times the distance over which the force acts
It's weight = mg; h


48. What is usually conserved over oscillation periods?
That it is negative
Energy
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Accelerated by a higher voltage between the cathode and anode


49. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Mv = mv
Strong acid and strong base/ weak acid and weak base


50. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
NO; reduction-oxidation
Accelerated by a higher voltage between the cathode and anode
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
A saturated solution in which the aqueous ions are in equilibrium with the solid