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. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
The density of the water and volume of the lead object
Ability to locate an event in space
[A]^a[B]^b
It can absorb light that lets other electrons fill those orbitals


2. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
Force times the distance over which the force acts
It decreases; the work done by the gas in expanding decreases its internal energy
H = negative and S = positive
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens


3. Why does light travel slower in an optically dense medium than through a vacuum?
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
Only temperature of the water bath
They do not differ
Light is absorbed and re-emitted by the atomic structure of the optically dense medium


4. In general what is formed by an acid-base rxn?
A salt and water
External components of the circuit
In the presence of a base
The path is longer on the inclined plane so it will take object longer to reach the bottom


5. 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?
The force along the board to the normal force
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
At an equal distance behind it as the object is in front of the mirror
No - it increases the speed at which the rxn reaches that equilibrium


6. What do electrolytic techniques involve?
The regular one
Positron emission
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Isolating an atom from minerals by decomposing the minerals with an electric current


7. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate 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
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
B = pVg; density
When you have central atom with six ions on it


8. What is sublimation?
A saturated solution in which the aqueous ions are in equilibrium with the solid
The force along the board to the normal force
When electron falls from high energy to low energy level
Going from solid to gas phase


9. What is the magnitude of the electric field produced by a point charge?
Constant to overcome the heat of fusion (solid to liquid state)
The buoyant force on it; W = mg = pVg
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
E = (kq)/r^2


10. Neither N2 or O2 have a permanent what? What does this mean?
It has a positive oxidation potential so it is easily oxidized
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
One that has more solute particles per liter of solution
Positron because this is known as positron decay/electron capture


11. Beta decay is the same as what?
A positron or electron; when atomic number goes up you know an electron has been emitted
Positron emission
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
It will be reduced the voltage produced by the resistor which means IR; E- IR


12. Nuclear masses can be approximated from what?

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13. What is the spin projection quantum number?
+/- 1/2
The current is the same
NO; reduction-oxidation
Electrons from anode and battery


14. 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
Voltage
When you have central atom with six ions on it
It decreases; the work done by the gas in expanding decreases its internal energy


15. 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?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
7 always!!!
[A]^a[B]^b
Electron shell number


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

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17. Light can be carried along a distance within a transparent material by means of what?
One that has more solute particles per liter of solution
Gravity
B = pVg; density
Total internal reflection


18. 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?
The cross-sectional area through which the fluid flows
That of static friction; there is a net accelerating force on the block once it starts to slide
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
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


19. What happens if an atom undergoes positron decay or electron capture?
Accelerated by a higher voltage between the cathode and anode
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
At an equal distance behind it as the object is in front of the mirror


20. If you have circuit elements in parallel what is the same across them?
Voltage
W = F(displacement)
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
H has a small atomic radius


21. Half-sine wave shape is what kind of wavelength with regards to length?
They do not differ
L = wavelength/2 so L= (wavelength)(2)
The current is the same
Isolating an atom from minerals by decomposing the minerals with an electric current


22. When a falling mass is at terminal speed - what is the power expended by the air resistance?
T = (2h/g)^1/2; distance = vt
It can also equal 'mg'; the compressive strength of a substance
Liquid displaced by that object
P = F(v) = mg(v -terminal)


23. What kind of charge is on Al?
B = pVg; density
3+
F = GMm/r^2
P = IV


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

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25. What is the relationship between P and n in PV=nRT?
They are directly proportional
From peak to peak
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
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4


26. What is Avagadro's number regarding ions/mol?
Negative
They are directly proportional
The lowest whole number ratio of moles of each element in a mole of a cmpd
6.02 x 10^23 ions/mol


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

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28. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
The force along the board to the normal force
When you have central atom with six ions on it
180 degrees; when there is half a wave distance in phase between two waves
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant


29. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Its intensity in the spectrum
No - it increases the speed at which the rxn reaches that equilibrium
They do not differ
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors


30. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
1000
E = (kq)/r^2
[S][2S]^2 = 4S^3
You look at what is being oxidized and reduced in the problem


31. The electrons emitted from cathode are replaced with what?
The element's mass number
Electrons from anode and battery
That of static friction; there is a net accelerating force on the block once it starts to slide
The current is the same


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

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33. What is the equation for bouyant force? What is p?
Decreasing potential energy
An odd number
400 to 700 nm
B = pVg; density


34. How should the period of a waveform be calculated?
(+)
From peak to peak
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Energy


35. When an element decreases its atomic number by one what is emitted?
0 Hz because they are traveling side by side at the same speed
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
+/- 1/2
Positron because this is known as positron decay/electron capture


36. The coefficient of kinetic friction is always lower than what? Therefore what?
It will increase as well because they are directly related - only if pressure is kept constant
Mag and direction
That of static friction; there is a net accelerating force on the block once it starts to slide
T = 2pi/angular velocity; v/r


37. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
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 nucleus gains a proton and no neutrons
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
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


38. What does spatial resolution refer to?
Ability to locate an event in space
The number of electrons emitted
It's weight = mg; h
In the presence of a base


39. What is newton's second law?
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
It will be reduced the voltage produced by the resistor which means IR; E- IR
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
A constant force on a mass causes it to have a constant acceleration


40. 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?
P = IV
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
A salt and water


41. What kind of metals react violently with water?
The current is the same
Alkali metals = first column
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
H has a small atomic radius


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

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43. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
It will increase as well because they are directly related - only if pressure is kept constant
Energy
One that has more solute particles per liter of solution
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous


44. The temperature of a metal will not increase above its melting point until what?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
7 always!!!
You look at what is being oxidized and reduced in the problem
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting


45. Isotopes have diff number of ______ but same what?
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
Ability to locate an event in space
Neutrons; atomic number
[A]^a[B]^b


46. 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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47. 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
Decreasing potential energy
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Positive


48. 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?
Sp^3
It has a positive oxidation potential so it is easily oxidized
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Force times the distance over which the force acts


49. In order to guarantee a non-zero spin how many electrons are needed?
Decreasing potential energy
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)
An odd number
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed


50. Friction is caused by what?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Attractive molecular forces acting between material surfaces in contact
When HIn is turned into In- - which is dependent upon the pKa of the indicator
They do not differ