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. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
V/m or N/C
The path is longer on the inclined plane so it will take object longer to reach the bottom
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4


2. In general what is formed by an acid-base rxn?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
External components of the circuit
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
A salt and water


3. The probability of an X-ray emission event at a given wavelength is measured by what?
The current is the same
The buoyant force on it; W = mg = pVg
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Its intensity in the spectrum


4. A pendulum moves under the influence of what?
Gravity
From peak to peak
An odd number
Cathode; anode


5. The temperature of a metal will not increase above its melting point until what?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
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
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
One mole of electric charge


6. How do you find moles of a substance when you are given faradays and electrons?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Faraday/electrons
Force times the distance over which the force acts


7. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
The lowest whole number ratio of moles of each element in a mole of a cmpd
Yes - if the particle's trail is equidistant between two adjacent anodes
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant


8. What is the magnitude of the electric field produced by a point charge?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Gravity
Electrons from anode and battery
E = (kq)/r^2


9. In PV=nRT - if temp increases what will happen to volume?
Positive
It will increase as well because they are directly related - only if pressure is kept constant
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
It can absorb light that lets other electrons fill those orbitals


10. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
H has a small atomic radius
External components of the circuit
The lowest one
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)


11. If both weight and bouyant force are dependent on g - that makes g independent of what?
The volume of the ice cube or whatever it is
Positron emission
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
It will increase as well because they are directly related - only if pressure is kept constant


12. Strength of dispersion force increases with what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
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
Colligative: it depends on the number of solute molecules in a given volume of water
NO; reduction-oxidation


13. What is the formula for the power supplied by a battery to accelerate an electron beam?
Positive
Gravity
It can absorb light that lets other electrons fill those orbitals
P = IV


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

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15. 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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16. Mechanical waves in a medium fxn to transport what?
Energy
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
An odd number
Force times the distance over which the force acts


17. The free energy change (G) must be negative when what?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
H = negative and S = positive
It will be reduced the voltage produced by the resistor which means IR; E- IR


18. The square root of 10^anything is equal to what?
Electrons from anode and battery
Decreasing potential energy
Half of the exponent
H = negative and S = positive


19. The electrons emitted from cathode are replaced with what?
Electrons from anode and battery
L = wavelength/2 so L= (wavelength)(2)
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


20. Nuclear masses can be approximated from what?

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21. What is the magnetic quantum number?
Negative
Electrons from anode and battery
-l to +l
A salt and water


22. What are the units of an electric field?
V/m or N/C
Negative
Faraday/electrons
Gravity


23. What is the doppler equation for wavelength and frequency?
-l to +l
External components of the circuit
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Half of the exponent


24. What is the equation for pressure?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
A salt and water
Gravity
Density (gravitational constant) height


25. How do you figure out the literature Ksp value of a compound?
E = (kq)/r^2
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
A saturated solution in which the aqueous ions are in equilibrium with the solid
Positron emission


26. What is the amt of energy that a frictional force generates?
W = F(displacement)
Force times the distance over which the force acts
(+)
P = F(v) = mg(v -terminal)


27. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
F = GMm/r^2
E = (kq)/r^2
P = F(v) = mg(v -terminal)
Cathode; anode


28. What is usually conserved over oscillation periods?
Energy
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
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


29. Can a catalyst shift equilibrium?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
When HIn is turned into In- - which is dependent upon the pKa of the indicator
7 always!!!
No - it increases the speed at which the rxn reaches that equilibrium


30. 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
How strong a base is
Positive
Accelerated by a higher voltage between the cathode and anode


31. The force on an electrical charge is what?
A constant force on a mass causes it to have a constant acceleration
When HIn is turned into In- - which is dependent upon the pKa of the indicator
T = (2h/g)^1/2; distance = vt
F =ma and F= qE


32. How do you balance redox rxns?

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33. What do electrolytic techniques involve?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Isolating an atom from minerals by decomposing the minerals with an electric current
H = negative and S = positive
Electrons from anode and battery


34. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
It's weight = mg; h
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
Negative
They do not differ


35. What is newton's second law?
Electron shell number
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
A constant force on a mass causes it to have a constant acceleration


36. How should the period of a waveform be calculated?
It's weight = mg; the work would be the weight times the distance fell
At an equal distance behind it as the object is in front of the mirror
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
From peak to peak


37. The total pressure of a solution is what? Give example.
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
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
The nucleus gains a proton and no neutrons


38. 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
Cathode; anode
Force times the distance over which the force acts
(density[p])(volume)


39. The coefficient of kinetic friction is always lower than what? Therefore what?
That of static friction; there is a net accelerating force on the block once it starts to slide
P = IV
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
0 Hz because they are traveling side by side at the same speed


40. If temperature arises during a mixture what can you conclude about the enthalpy?
The lowest one
[A]^a[B]^b
The volume of the ice cube or whatever it is
That it is negative


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

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42. The phase difference corresponding to a half wave is what? When do you get destructive interference?
180 degrees; when there is half a wave distance in phase between two waves
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
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


43. What color is above 656 nm?
Momentum
Mg
Red
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect


44. Beta decay is the same as what?
Positron emission
Its intensity in the spectrum
W = F(displacement)
The particle's charge and the magnitude of the electric field


45. In order to increase the kinetic energy of electrons - they must be what?
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
Accelerated by a higher voltage between the cathode and anode
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
6.02 x 10^23 ions/mol


46. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Electron shell number
Mv = mv
Helium; 4
The lowest whole number ratio of moles of each element in a mole of a cmpd


47. Kb is the equilibrium constant for what?
The reaction between the base and water
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Energy


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

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49. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Faraday/electrons
External components of the circuit
It has a positive oxidation potential so it is easily oxidized
Positive


50. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
The force along the board to the normal force
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
It can absorb light that lets other electrons fill those orbitals
[S][2S]^2 = 4S^3