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. In order to guarantee a non-zero spin how many electrons are needed?
Accelerated by a higher voltage between the cathode and anode
The element's mass number
An odd number
Colligative; the number of solute particles present


2. The free energy change (G) must be negative when what?
T = 2pi/angular velocity; v/r
A positron or electron; when atomic number goes up you know an electron has been emitted
H = negative and S = positive
At an equal distance behind it as the object is in front of the mirror


3. Mechanical waves in a medium fxn to transport what?
It decreases; the work done by the gas in expanding decreases its internal energy
It can absorb light that lets other electrons fill those orbitals
Energy
The current is the same


4. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
Faraday/electrons
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
It can absorb light that lets other electrons fill those orbitals


5. The coefficient of kinetic friction is always lower than what? Therefore what?
NO; reduction-oxidation
That of static friction; there is a net accelerating force on the block once it starts to slide
Pascal (N*m^2)
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14


6. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
Going from solid to gas phase
F = GMm/r^2
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
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. What are the three separate module for tensile stress - shear stress - and compression/expansion?

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8. How do you find specific gravity of an object?
6.02 x 10^23 ions/mol
Electron shell number
Half of the exponent
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


9. How would you find rate of rxn from pH 1 to pH2?
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
Gravity
Colligative: it depends on the number of solute molecules in a given volume of 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


10. The boiling point of a solution is what type of property? Which means is depends only on what?
They do not differ
T = 2pi/angular velocity; v/r
When electron falls from high energy to low energy level
Colligative; the number of solute particles present


11. What is the law of conservation of linear momentum?
Mv = mv
Helium; 4
Electrons from anode and battery
They must balance


12. What is the equation for bouyant force? What is p?
It will be reduced the voltage produced by the resistor which means IR; E- IR
[A]^a[B]^b
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
B = pVg; density


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

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14. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
Gravity
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
Negative
Mv = mv


15. Light can be carried along a distance within a transparent material by means of what?
They are directly proportional
Total internal reflection
Decreasing potential energy
The buoyant force on it; W = mg = pVg


16. Always remember that velocity has ____ and ____
Mag and direction
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
It's weight = mg; the work would be the weight times the distance fell
Faraday/electrons


17. When a falling mass is at terminal speed - what is the power expended by the air resistance?
P = F(v) = mg(v -terminal)
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
It's weight = mg; the work would be the weight times the distance fell
It can also equal 'mg'; the compressive strength of a substance


18. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
-l to +l
That it is negative
Decreasing potential energy


19. The range of pH in which a color change takes place in a titration depends on 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
When HIn is turned into In- - which is dependent upon the pKa of the indicator
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Mg


20. 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
Neutrons; atomic number
The lowest whole number ratio of moles of each element in a mole of a cmpd
They increase because you hear a lower frequency


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

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22. When does red litmus paper turn blue?
The buoyant force on it; W = mg = pVg
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Going from solid to gas phase
In the presence of a base


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

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24. What happens to a negatively charged particle put between two parallel plates?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
NO; reduction-oxidation
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
It experiences a constant electric force of qE and will thus accelerate towards the positive plate


25. What is the spin projection quantum number?
+/- 1/2
Yes - if the particle's trail is equidistant between two adjacent anodes
P = F(v) = mg(v -terminal)
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


26. Strength of dispersion force increases with what?
Half of the exponent
Ease of polarizability of the molecule and thus increasing molecular weight of mass
You look at what is being oxidized and reduced in the problem
400 to 700 nm


27. What kind of geometry is octahedral?
Colligative; the number of solute particles present
Zero
When you have central atom with six ions on it
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant


28. 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?
They increase because you hear a lower frequency
(+)
Ease of polarizability of the molecule and thus increasing molecular weight of mass
When you have central atom with six ions on it


29. What is the equation for a period (T)? What is the equation for angular velocity?
You look at what is being oxidized and reduced in the problem
3+
P = F(v) = mg(v -terminal)
T = 2pi/angular velocity; v/r


30. In general what is formed by an acid-base rxn?
Helium; 4
That they are catalysts in the rxn because they react with the substrate and are reformed
+/- 1/2
A salt and water


31. The visible spectrum ranges from ____ to _____
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
Sp^3
The regular one
400 to 700 nm


32. How many mL is in one liter?
At an equal distance behind it as the object is in front of the mirror
1000
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Liquid displaced by that object


33. Nuclear masses can be approximated from what?

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34. If temperature arises during a mixture what can you conclude about the enthalpy?
That it is negative
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
Colligative; the number of solute particles present
-l to +l


35. Why does light travel slower in an optically dense medium than through a vacuum?
The cross-sectional area through which the fluid flows
Going from solid to gas phase
400 to 700 nm
Light is absorbed and re-emitted by the atomic structure of the optically dense medium


36. How do you find wavelength if you known distance from adjacent crests and troughs?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Its twice that distance
An odd number
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect


37. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[A]^a[B]^b
Ability to locate an event in space
Its intensity in the spectrum
[S][2S]^2 = 4S^3


38. The probability of an X-ray emission event at a given wavelength is measured by what?
Density (gravitational constant) height
You look at what is being oxidized and reduced in the problem
Red
Its intensity in the spectrum


39. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
Voltage
A current; a magnetic field into a curved path; the charge and mass of the incoming particle and can be effectively used to distinguish different species of particles from one another
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water


40. A nearsighted person has what type of focal length? Thus what do we do to correct this?
F =ma and F= qE
It's weight = mg; the work would be the weight times the distance fell
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens


41. If you are given density and volume how do you find mass?
H = negative and S = positive
(density[p])(volume)
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Electron shell number


42. Hydrogen has what kind of standard oxidation or reduction potential?
Zero
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
+/- 1/2
E = (kq)/r^2


43. What is conserved in an inellastic collision?
V/m or N/C
180 degrees; when there is half a wave distance in phase between two waves
Momentum
Polar


44. In order to increase the kinetic energy of electrons - they must be what?
NO; reduction-oxidation
They are directly proportional
Accelerated by a higher voltage between the cathode and anode
Ease of polarizability of the molecule and thus increasing molecular weight of mass


45. When an element decreases its atomic number by one what is emitted?
+/- 1/2
L = wavelength/2 so L= (wavelength)(2)
Positron because this is known as positron decay/electron capture
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting


46. What do electrolytic techniques involve?
Electrons from anode and battery
3+
A positron or electron; when atomic number goes up you know an electron has been emitted
Isolating an atom from minerals by decomposing the minerals with an electric current


47. What is the unit for Young's Modulus?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
F =ma and F= qE
Pascal (N*m^2)
7 always!!!


48. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
One that has more solute particles per liter of solution
+/- 1/2
Only temperature of the water bath
Negative


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

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50. Friction is caused by what?
0 Hz because they are traveling side by side at the same speed
A current; a magnetic field into a curved path; the charge and mass of the incoming particle and can be effectively used to distinguish different species of particles from one another
Attractive molecular forces acting between material surfaces in contact
From peak to peak