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. What is newton's second law?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
[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
A constant force on a mass causes it to have a constant acceleration


2. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
One that has more solute particles per liter of solution
Mv = mv
The regular one
Positive


3. What does the empirical formula show?
Force times the distance over which the force acts
The lowest whole number ratio of moles of each element in a mole of a cmpd
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
Faraday/electrons


4. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
NO; reduction-oxidation
Going from solid to gas phase
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


5. What is the doppler equation for wavelength and frequency?
E = (kq)/r^2
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
[A]^a[B]^b
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus


6. What is the magnitude of the electric field produced by a point charge?
E = (kq)/r^2
Its twice that distance
Ability to locate an event in space
Its momentum is zero because velocity is zero; zero because of conservation of momentum


7. What color is above 656 nm?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
They do not differ
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Red


8. The volume of an object is equal to water?
Liquid displaced by that object
The number of electrons emitted
When all the external forces = zero
They must balance


9. 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
Alkali metals = first column
B = pVg; density
Constant to overcome the heat of fusion (solid to liquid state)


10. In a rxn - how do you figure out which atom has the highest electron affinity?
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
It will increase as well because they are directly related - only if pressure is kept constant
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
W = F(displacement)


11. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
7 always!!!
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
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


12. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
From peak to peak
The nucleus gains a proton and no neutrons
P = IV


13. Terminal voltage is provided to what?
External components of the circuit
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
F = GMm/r^2


14. 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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15. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
It has a positive oxidation potential so it is easily oxidized
Isolating an atom from minerals by decomposing the minerals with an electric current
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
That they are catalysts in the rxn because they react with the substrate and are reformed


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

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17. The closer the spacing of the anode wire - the better one can specify what?
Helium; 4
Density (gravitational constant) height
Where an event took place
(+)


18. What is the relationship between P and n in PV=nRT?
They are directly proportional
400 to 700 nm
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
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


19. Why are bonds between H and another atom shorter compared to most?
H has a small atomic radius
When you have central atom with six ions on it
Positron because this is known as positron decay/electron capture
Strong acid and strong base/ weak acid and weak base


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

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21. What energy conversion describes best what takes place in a battery-powered resistive circuit?
P = F(v) = mg(v -terminal)
Constant to overcome the heat of fusion (solid to liquid state)
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Half of the exponent


22. 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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23. Strength of dispersion force increases with what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Total internal reflection
Mv = mv
It has a positive oxidation potential so it is easily oxidized


24. The visible spectrum ranges from ____ to _____
The current is the same
400 to 700 nm
An odd number
Colligative: it depends on the number of solute molecules in a given volume of water


25. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
The lowest one
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Positive
H = negative and S = positive


26. What direction do gravity and bouyancy work? What direction does water pressure work?
Vertically; perpendicular to all surfaces
Going from solid to gas phase
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
T = (2h/g)^1/2; distance = vt


27. What is sublimation?
Going from solid to gas phase
Electrons from anode and battery
[A]^a[B]^b
E = (kq)/r^2


28. 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
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Energy
Zero


29. A plane mirror produces an image where?
Electrons from anode and battery
Cathode; anode
7 always!!!
At an equal distance behind it as the object is in front of the mirror


30. What is conserved in an inellastic collision?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
It can also equal 'mg'; the compressive strength of a substance
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Momentum


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

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32. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Only temperature of the water bath
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
The lowest one
Faraday/electrons


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

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34. Beta decay is the same as what?
Positron emission
The particle's charge and the magnitude of the electric field
It's weight = mg; h
1000


35. The number of incident photons on the cathode affect what?
It has a positive oxidation potential so it is easily oxidized
The number of electrons emitted
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
When all the external forces = zero


36. 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?
180 degrees; when there is half a wave distance in phase between two waves
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
(+)
Half of the exponent


37. What happens if an atom undergoes positron decay or electron capture?
How strong a base is
At an equal distance behind it as the object is in front of the mirror
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)


38. A pendulum moves under the influence of what?
Gravity
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
[A]^a[B]^b
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


39. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Neutrons; atomic number
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Sp^3
Force times the distance over which the force acts


40. 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
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Strong acid and strong base/ weak acid and weak base
Force times the distance over which the force acts


41. What is the principal quantum number (n)?
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 decreases; the work done by the gas in expanding decreases its internal energy
Electron shell number
Polar


42. In Bohr model of atom when is energy emitted?
When electron falls from high energy to low energy level
Going from solid to gas phase
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
Add them together


43. Acetic acid is a ______ solvent
No - it increases the speed at which the rxn reaches that equilibrium
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Add them together
Polar


44. If you are given density and volume how do you find mass?
Mass number stays the same but the atomic number increases
The lowest one
V/m or N/C
(density[p])(volume)


45. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
[S][2S]^2 = 4S^3
B = pVg; density
Mag and direction


46. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
Strong acid and strong base/ weak acid and weak base
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
That it is negative
They do not differ


47. What is Newton's Universal Law of Gravitation?
3+
F = GMm/r^2
They increase because you hear a lower frequency
Strong acid and strong base/ weak acid and weak base


48. What is one faraday equal to?
Colligative: it depends on the number of solute molecules in a given volume of water
Where an event took place
One mole of electric charge
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


49. Light can be carried along a distance within a transparent material by means of what?
It can absorb light that lets other electrons fill those orbitals
Positron because this is known as positron decay/electron capture
Total internal reflection
The volume of the ice cube or whatever it is


50. What kind of charge is on Al?
Alkali metals = first column
When all the external forces = zero
3+
That of static friction; there is a net accelerating force on the block once it starts to slide