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. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Positive
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
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces


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

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3. What is the magnitude of the electric field produced by a point charge?
Negative
Helium; 4
They do not differ
E = (kq)/r^2


4. The coefficient of kinetic friction is always lower than what? Therefore what?
(+)
Neutrons; atomic number
That of static friction; there is a net accelerating force on the block once it starts to slide
One mole of electric charge


5. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
The path is longer on the inclined plane so it will take object longer to reach the bottom
Sp^3
A saturated solution in which the aqueous ions are in equilibrium with the solid
Its twice that distance


6. The free energy change (G) must be negative when what?
External components of the circuit
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
H = negative and S = positive
When electron falls from high energy to low energy level


7. What is a metathesis rxn?
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
It has a positive oxidation potential so it is easily oxidized
Ability to locate an event in space
It decreases; the work done by the gas in expanding decreases its internal energy


8. When is a body in translational equilibrium?
When all the external forces = zero
They do not differ
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The regular one


9. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
They do not differ
Decreasing potential energy
One mole of electric charge
Mag and direction


10. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
[A]^a[B]^b
A saturated solution in which the aqueous ions are in equilibrium with the solid
1000


11. What is the principal quantum number (n)?
Where an event took place
F =ma and F= qE
Electron shell number
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


12. The visible spectrum ranges from ____ to _____
400 to 700 nm
Momentum
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
It experiences a constant electric force of qE and will thus accelerate towards the positive plate


13. How do you find length of time something is in flight? How do you find distance it traveled?
The force along the board to the normal force
External components of the circuit
The current is the same
T = (2h/g)^1/2; distance = vt


14. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
That they are catalysts in the rxn because they react with the substrate and are reformed
+/- 1/2
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
One that has more solute particles per liter of solution


15. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
It decreases; the work done by the gas in expanding decreases its internal energy
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
The element's mass number


16. 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
Force times the distance over which the force acts
A constant force on a mass causes it to have a constant acceleration
The reaction between the base and water


17. What is conserved in an inellastic collision?
Momentum
B = pVg; density
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
Colligative: it depends on the number of solute molecules in a given volume of water


18. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
Attractive molecular forces acting between material surfaces in contact
400 to 700 nm
[S][2S]^2 = 4S^3
Sp^3


19. The equivalence pt is what part of the titration curve? Thus looking at the range of change between the pH values along this part of the graph can tell you what?

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20. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
Mass number stays the same but the atomic number increases
Mv = mv
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
The element's mass number


21. In general what is formed by an acid-base rxn?
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
A salt and water
At an equal distance behind it as the object is in front of the mirror
It experiences a constant electric force of qE and will thus accelerate towards the positive plate


22. In Bohr model of atom when is energy emitted?
Electron shell number
[S][2S]^2 = 4S^3
When electron falls from high energy to low energy level
The force along the board to the normal force


23. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
The cross-sectional area through which the fluid flows
Helium; 4
NO; reduction-oxidation


24. What are the units of an electric field?
Accelerated by a higher voltage between the cathode and anode
When you have central atom with six ions on it
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
V/m or N/C


25. The range of pH in which a color change takes place in a titration depends on what?
Colligative; the number of solute particles present
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
It will be reduced the voltage produced by the resistor which means IR; E- IR
When HIn is turned into In- - which is dependent upon the pKa of the indicator


26. Heat from friction comes from what?
P = F(v) = mg(v -terminal)
Decreasing potential energy
No - it increases the speed at which the rxn reaches that equilibrium
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors


27. 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?
The current is the same
From peak to peak
Add them together
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


28. What do electrolytic techniques involve?
Liquid displaced by that object
Isolating an atom from minerals by decomposing the minerals with an electric current
Mg
V/m or N/C


29. 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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30. What is one faraday equal to?
One mole of electric charge
Ease of polarizability of the molecule and thus increasing molecular weight of mass
(density[p])(volume)
The number of electrons emitted


31. 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?
F =ma and F= qE
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Mag and direction
Voltage


32. In order to increase the kinetic energy of electrons - they must be what?
Ability to locate an event in space
Accelerated by a higher voltage between the cathode and anode
The reaction between the base and water
Where an event took place


33. How do you figure out the literature Ksp value of a compound?
Mg
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
A saturated solution in which the aqueous ions are in equilibrium with the solid
One mole of electric charge


34. How should the period of a waveform be calculated?
Electron shell number
Attractive molecular forces acting between material surfaces in contact
Mg
From peak to peak


35. Half-sine wave shape is what kind of wavelength with regards to length?
From peak to peak
A salt and water
L = wavelength/2 so L= (wavelength)(2)
Force times the distance over which the force acts


36. The square root of 10^anything is equal to what?
Half of the exponent
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
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


37. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Accelerated by a higher voltage between the cathode and anode
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
(+)
Colligative; the number of solute particles present


38. In PV=nRT - if temp increases what will happen to volume?
Pascal (N*m^2)
It will increase as well because they are directly related - only if pressure is kept constant
E = (kq)/r^2
In the presence of a base


39. What is the law of conservation of linear momentum?
Strong acid and strong base/ weak acid and weak base
Mv = mv
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The force along the board to the normal force


40. 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
F = GMm/r^2
Colligative; the number of solute particles present
Gravity


41. In radioactive decay the atomic number (A) and mass number (Z) must what?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Ease of polarizability of the molecule and thus increasing molecular weight of mass
They must balance
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens


42. If you have circuit elements in parallel what is the same across them?
P = IV
Voltage
It has a positive oxidation potential so it is easily oxidized
Attractive molecular forces acting between material surfaces in contact


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

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44. What is the equation for work done?
W = F(displacement)
The lowest whole number ratio of moles of each element in a mole of a cmpd
7 always!!!
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


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

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46. The number of incident photons on the cathode affect what?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Positive
The number of electrons emitted
They do not differ


47. What is newton's second law?
When all the external forces = zero
A constant force on a mass causes it to have a constant acceleration
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Negative


48. How do you find wavelength if you known distance from adjacent crests and troughs?
Going from solid to gas phase
Its twice that distance
Colligative; the number of solute particles present
T = 2pi/angular velocity; v/r


49. The basicity constant Kb measures what?
You look at what is being oxidized and reduced in the problem
How strong a base is
Mg
Positron emission


50. The coefficient of static friction is the ratio of what?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
The force along the board to the normal force
NO; reduction-oxidation
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