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. When does red litmus paper turn blue?
In the presence of a base
When electron falls from high energy to low energy level
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
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)


2. What is the magnetic quantum number?
-l to +l
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
It experiences a constant electric force of qE and will thus accelerate towards the positive plate


3. Acetic acid is a ______ solvent
Accelerated by a higher voltage between the cathode and anode
Faraday/electrons
Polar
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles


4. The freezing point of an aqueous solution is what kind of property? What does this mean?
Colligative: it depends on the number of solute molecules in a given volume of water
-l to +l
A saturated solution in which the aqueous ions are in equilibrium with the solid
One mole of electric charge


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

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

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7. How do you find 'g' from Newton's law of gravity?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
0 Hz because they are traveling side by side at the same speed
Only temperature of the water bath
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous


8. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
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
Colligative; the number of solute particles present
Where an event took place
[S][2S]^2 = 4S^3


9. 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?
Its intensity in the spectrum
Accelerated by a higher voltage between the cathode and anode
0 Hz because they are traveling side by side at the same speed
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c


10. In Bohr model of atom when is energy emitted?
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
400 to 700 nm
When electron falls from high energy to low energy level
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant


11. The square root of 10^anything is equal to what?
Half of the exponent
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
In the presence of a base


12. 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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13. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
No - it increases the speed at which the rxn reaches that equilibrium
They do not differ
Accelerated by a higher voltage between the cathode and anode
When you have central atom with six ions on it


14. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
Density (gravitational constant) height
Red
Mass number stays the same but the atomic number increases
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


15. Melting occurs at what type of temperature? Why?
One mole of electric charge
Constant to overcome the heat of fusion (solid to liquid state)
When electron falls from high energy to low energy level
Electron shell number


16. How do you find wavelength if you known distance from adjacent crests and troughs?
7 always!!!
Its twice that distance
Ability to locate an event in space
[S][2S]^2 = 4S^3


17. Isotopes have diff number of ______ but same what?
Neutrons; atomic number
Its intensity in the spectrum
That of static friction; there is a net accelerating force on the block once it starts to slide
Vertically; perpendicular to all surfaces


18. Mechanical waves in a medium fxn to transport what?
H has a small atomic radius
T = 2pi/angular velocity; v/r
Energy
Vertically; perpendicular to all surfaces


19. What is the law of conservation of linear momentum?
Mv = mv
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Force times the distance over which the force acts
B = pVg; density


20. The Ksp for a substance of AaBb is what?
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
[A]^a[B]^b
E = (kq)/r^2


21. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Its intensity in the spectrum
Positive
Positron emission


22. What is one faraday equal to?
One mole of electric charge
A constant force on a mass causes it to have a constant acceleration
The particle's charge and the magnitude of the electric field
Accelerated by a higher voltage between the cathode and anode


23. The closer the spacing of the anode wire - the better one can specify what?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Where an event took place
NO; reduction-oxidation
(+)


24. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
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
Neutrons; atomic number
The number of electrons emitted


25. A saturated solution of KNO3 means what? If you add salt that has any of these two ions what will happen? What is this called?
Mag and direction
Mv = mv
Electron shell number
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect


26. Can a catalyst shift equilibrium?
400 to 700 nm
It will be reduced the voltage produced by the resistor which means IR; E- IR
+/- 1/2
No - it increases the speed at which the rxn reaches that equilibrium


27. Half-sine wave shape is what kind of wavelength with regards to length?
It has a positive oxidation potential so it is easily oxidized
Polar
L = wavelength/2 so L= (wavelength)(2)
No - it increases the speed at which the rxn reaches that equilibrium


28. When a falling mass is at terminal speed - what is the power expended by the air resistance?
Ability to locate an event in space
P = F(v) = mg(v -terminal)
Positive
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous


29. What is the equation for pressure?
Density (gravitational constant) height
Yes - if the particle's trail is equidistant between two adjacent anodes
(+)
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


30. The electrons emitted from cathode are replaced with what?
1000
Where an event took place
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Electrons from anode and battery


31. What is weight equal to?
Electron shell number
That they are catalysts in the rxn because they react with the substrate and are reformed
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Mg


32. In radioactive decay the atomic number (A) and mass number (Z) must what?
Momentum
H has a small atomic radius
They must balance
Yes - if the particle's trail is equidistant between two adjacent anodes


33. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
It decreases; the work done by the gas in expanding decreases its internal energy
Positive
Constant to overcome the heat of fusion (solid to liquid state)
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)


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

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35. 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?
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
Its intensity in the spectrum
T = 2pi/angular velocity; v/r
V/m or N/C


36. 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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37. What happens to a negatively charged particle put between two parallel plates?
NO; reduction-oxidation
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
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous


38. What is the amt of energy that a frictional force generates?
Force times the distance over which the force acts
The cross-sectional area through which the fluid flows
Liquid displaced by that object
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14


39. What is Newton's Universal Law of Gravitation?
Energy
Its intensity in the spectrum
F = GMm/r^2
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure


40. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
They increase because you hear a lower frequency
Energy
Mg
It will be reduced the voltage produced by the resistor which means IR; E- IR


41. Is the work done by air resistance - positive or negative?
They increase because you hear a lower frequency
Negative
The volume of the ice cube or whatever it is
7 always!!!


42. The free energy change (G) must be negative when what?
The particle's charge and the magnitude of the electric field
The current is the same
The buoyant force on it; W = mg = pVg
H = negative and S = positive


43. For a given flow rate - the speed of fluid flow is inversely proportional to 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
The cross-sectional area through which the fluid flows
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio


44. The number of incident photons on the cathode affect what?
Where an event took place
T = 2pi/angular velocity; v/r
The number of electrons emitted
When electron falls from high energy to low energy level


45. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Force times the distance over which the force acts
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The current is the same
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R


46. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
Its twice that distance
The nucleus gains a proton and no neutrons
H = negative and S = positive
0 Hz because they are traveling side by side at the same speed


47. What is the unit for Young's Modulus?
Isolating an atom from minerals by decomposing the minerals with an electric current
Pascal (N*m^2)
Ability to locate an event in space
One mole of electric charge


48. What kind of metals react violently with water?
Alkali metals = first column
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
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
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect


49. Strength of dispersion force increases with what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
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 regular one
180 degrees; when there is half a wave distance in phase between two waves


50. Always remember that velocity has ____ and ____
The element's mass number
The lowest one
Mag and direction
3+