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?
0 Hz because they are traveling side by side at the same speed
Ease of polarizability of the molecule and thus increasing molecular weight of mass
L = wavelength/2 so L= (wavelength)(2)
One mole of electric charge


2. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
F = GMm/r^2
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
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
The element's mass number


3. If you have circuit elements in parallel what is the same across them?
When all the external forces = zero
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
Energy
Voltage


4. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
T = (2h/g)^1/2; distance = vt
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
Total internal reflection
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2


5. Beta decay is the emission of what? How do you know what it is the emission of?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
A constant force on a mass causes it to have a constant acceleration
A positron or electron; when atomic number goes up you know an electron has been emitted
The particle's charge and the magnitude of the electric field


6. 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
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
How strong a base is
Only temperature of the water bath


7. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
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)
When HIn is turned into In- - which is dependent upon the pKa of the indicator
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
400 to 700 nm


8. Beta decay is the same as what?
B = pVg; density
Positron emission
F = GMm/r^2
Yes - if the particle's trail is equidistant between two adjacent anodes


9. The volume of an object is equal to water?
Neutrons; atomic number
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
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
Liquid displaced by that object


10. Hydrogen has what kind of standard oxidation or reduction potential?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Where an event took place
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Zero


11. A pendulum moves under the influence of what?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Gravity
Half of the exponent
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


12. 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
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Add them together
At an equal distance behind it as the object is in front of the mirror


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

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14. Neither N2 or O2 have a permanent what? What does this mean?
The regular one
Mag and direction
3+
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces


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

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16. What direction do gravity and bouyancy work? What direction does water pressure work?
Going from solid to gas phase
A positron or electron; when atomic number goes up you know an electron has been emitted
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Vertically; perpendicular to all surfaces


17. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
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
NO; reduction-oxidation
H = negative and S = positive
One mole of electric charge


18. In Bohr model of atom when is energy emitted?
When electron falls from high energy to low energy level
They must balance
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
The regular one


19. A plane mirror produces an image where?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Add them together
Accelerated by a higher voltage between the cathode and anode
At an equal distance behind it as the object is in front of the mirror


20. Always remember that velocity has ____ and ____
Mag and direction
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Electron shell number
Pascal (N*m^2)


21. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Helium; 4
Density (gravitational constant) height
Negative
The lowest one


22. Acetic acid is a ______ solvent
Half of the exponent
The cross-sectional area through which the fluid flows
Polar
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


23. Kb is the equilibrium constant for what?
A saturated solution in which the aqueous ions are in equilibrium with the solid
The reaction between the base and water
Cathode; anode
Electrons from anode and battery


24. The electrons emitted from cathode are replaced with what?
H = negative and S = positive
The cross-sectional area through which the fluid flows
Electrons from anode and battery
[S][2S]^2 = 4S^3


25. What is the equation for work done?
W = F(displacement)
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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
Positron because this is known as positron decay/electron capture


26. The phase difference corresponding to a half wave is what? When do you get destructive interference?
The element's mass number
180 degrees; when there is half a wave distance in phase between two waves
The volume of the ice cube or whatever it is
Positive


27. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
Gravity
The particle's charge and the magnitude of the electric field
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
It decreases; the work done by the gas in expanding decreases its internal energy


28. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
The regular one
Half of the exponent
[S][2S]^2 = 4S^3
Sp^3


29. What is newton's second law?
F =ma and F= qE
A constant force on a mass causes it to have a constant acceleration
H has a small atomic radius
It experiences a constant electric force of qE and will thus accelerate towards the positive plate


30. So if you have a voltage of 1/4V it will be reduced by what? Thus what will be the equation for the terminal voltage?
It will be reduced the voltage produced by the resistor which means IR; E- IR
When electron falls from high energy to low energy level
How strong a base is
In the presence of a base


31. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
A constant force on a mass causes it to have a constant acceleration
Ease of polarizability of the molecule and thus increasing molecular weight of mass
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
It experiences a constant electric force of qE and will thus accelerate towards the positive plate


32. 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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33. How do you find length of time something is in flight? How do you find distance it traveled?
400 to 700 nm
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
T = (2h/g)^1/2; distance = vt
H = negative and S = positive


34. What does spatial resolution refer to?
It's weight = mg; h
NO; reduction-oxidation
Alkali metals = first column
Ability to locate an event in space


35. What does the empirical formula show?
Negative
The lowest whole number ratio of moles of each element in a mole of a cmpd
Electron shell number
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio


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

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37. In order to increase the kinetic energy of electrons - they must be what?
When electron falls from high energy to low energy level
1000
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
Accelerated by a higher voltage between the cathode and anode


38. What is the formula for the power supplied by a battery to accelerate an electron beam?
Strong acid and strong base/ weak acid and weak base
The lowest one
Zero
P = IV


39. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
They must balance
H has a small atomic radius
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 they are catalysts in the rxn because they react with the substrate and are reformed


40. In order to guarantee a non-zero spin how many electrons are needed?
Constant to overcome the heat of fusion (solid to liquid state)
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
An odd number
They increase because you hear a lower frequency


41. Friction is caused by what?
Energy
Attractive molecular forces acting between material surfaces in contact
Going from solid to gas phase
That it is negative


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

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43. What is the equation for bouyant force? What is p?
Constant to overcome the heat of fusion (solid to liquid state)
Sp^3
B = pVg; density
It will be reduced the voltage produced by the resistor which means IR; E- IR


44. Can a catalyst shift equilibrium?
No - it increases the speed at which the rxn reaches that equilibrium
Mg
T = 2pi/angular velocity; v/r
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


45. When you are trying to calculate a galvanic cell's emf - what do you look at?
You look at what is being oxidized and reduced in the problem
They must balance
That they are catalysts in the rxn because they react with the substrate and are reformed
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


46. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
Energy
Decreasing potential energy
Isolating an atom from minerals by decomposing the minerals with an electric current
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed


47. 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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48. What kind of metals react violently with water?
E = (kq)/r^2
T = 2pi/angular velocity; v/r
Accelerated by a higher voltage between the cathode and anode
Alkali metals = first column


49. How should the period of a waveform be calculated?
From peak to peak
180 degrees; when there is half a wave distance in phase between two waves
Mg
The path is longer on the inclined plane so it will take object longer to reach the bottom


50. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
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
Force times the distance over which the force acts
Positive