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 the magnetic quantum number?
B = pVg; density
Negative
Neutrons; atomic number
-l to +l


2. What is newton's second law?
A constant force on a mass causes it to have a constant acceleration
Negative
Toward the side with more gaseous molecules; towards the side that doesn't give off as much heat (remember heat is given off when molecules are formed and thus (-) enthalpy)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant


3. How should the period of a waveform be calculated?
From peak to peak
The nucleus gains a proton and no neutrons
Ease of polarizability of the molecule and thus increasing molecular weight of mass
That they are catalysts in the rxn because they react with the substrate and are reformed


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

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

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6. What happens to a negatively charged particle put between two parallel plates?
6.02 x 10^23 ions/mol
The cross-sectional area through which the fluid flows
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
The particle's charge and the magnitude of the electric field


7. 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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8. What is the unit for Young's Modulus?
Pascal (N*m^2)
W = F(displacement)
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 volume of the ice cube or whatever it is


9. 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
How strong a base is
W = F(displacement)
Where an event took place


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

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11. 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?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
[A]^a[B]^b
Polar
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)


12. How do you balance redox rxns?

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13. The volume of an object is equal to water?
They do not differ
Gravity
Sp^3
Liquid displaced by that object


14. What energy conversion describes best what takes place in a battery-powered resistive circuit?
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
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
The density of the water and volume of the lead object
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure


15. What is the amt of energy that a frictional force generates?
One mole of electric charge
T = (2h/g)^1/2; distance = vt
It has a positive oxidation potential so it is easily oxidized
Force times the distance over which the force acts


16. What is the doppler equation for wavelength and frequency?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Energy
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
One that has more solute particles per liter of solution


17. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
The volume of the ice cube or whatever it is
It will increase as well because they are directly related - only if pressure is kept constant
Mass number stays the same but the atomic number increases
It will be reduced the voltage produced by the resistor which means IR; E- IR


18. What type of acid and base would produce a pH closest to 7?
Strong acid and strong base/ weak acid and weak base
A salt and water
Going from solid to gas phase
Voltage


19. The probability of an X-ray emission event at a given wavelength is measured by what?
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
Its intensity in the spectrum
When you have central atom with six ions on it
Alkali metals = first column


20. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Positive
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio


21. What is Newton's Universal Law of Gravitation?
F = GMm/r^2
Mg
It will increase as well because they are directly related - only if pressure is kept constant
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous


22. The Ksp for a substance of AaBb is what?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Colligative: it depends on the number of solute molecules in a given volume of water
A saturated solution in which the aqueous ions are in equilibrium with the solid
[A]^a[B]^b


23. What kind of charge is on Al?
3+
No - it increases the speed at which the rxn reaches that equilibrium
The path is longer on the inclined plane so it will take object longer to reach the bottom
When electron falls from high energy to low energy level


24. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
[S][2S]^2 = 4S^3
The nucleus gains a proton and no neutrons
A saturated solution in which the aqueous ions are in equilibrium with the solid
An odd number


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

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26. Is the work done by air resistance - positive or negative?
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
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
(+)
Negative


27. In order to increase the kinetic energy of electrons - they must be what?
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
Neutrons; atomic number
Accelerated by a higher voltage between the cathode and anode
One that has more solute particles per liter of solution


28. Why does light travel slower in an optically dense medium than through a vacuum?
They must balance
It will be reduced the voltage produced by the resistor which means IR; E- IR
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
+/- 1/2


29. A nearsighted person has what type of focal length? Thus what do we do to correct this?
One mole of electric charge
B = pVg; density
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens


30. The closer the spacing of the anode wire - the better one can specify what?
-l to +l
Faraday/electrons
Gravity
Where an event took place


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

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32. How would you find rate of rxn from pH 1 to pH2?
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 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
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
F = GMm/r^2


33. When an element decreases its atomic number by one what is emitted?
F = GMm/r^2
Positron because this is known as positron decay/electron capture
Positive
Cathode; anode


34. Light can be carried along a distance within a transparent material by means of what?
Voltage
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Total internal reflection


35. The total pressure of a solution is what? Give example.
Helium; 4
NO; reduction-oxidation
A saturated solution in which the aqueous ions are in equilibrium with the solid
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


36. The electrons emitted from cathode are replaced with what?
Colligative; the number of solute particles present
Faraday/electrons
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Electrons from anode and battery


37. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
Sp^3
P = IV
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
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


38. In general what is formed by an acid-base rxn?
How strong a base is
Ease of polarizability of the molecule and thus increasing molecular weight of mass
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
A salt and water


39. If temperature arises during a mixture what can you conclude about the enthalpy?
An odd number
Only temperature of the water bath
That it is negative
The number of electrons emitted


40. So if you have a voltage of 1/4V it will be reduced by what? Thus what will be the equation for the terminal voltage?
A saturated solution in which the aqueous ions are in equilibrium with the solid
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Polar
It will be reduced the voltage produced by the resistor which means IR; E- IR


41. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
V/m or N/C
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
At an equal distance behind it as the object is in front of the mirror
It can absorb light that lets other electrons fill those orbitals


42. The force on an electrical charge is what?
Neutrons; atomic number
F =ma and F= qE
The path is longer on the inclined plane so it will take object longer to reach the bottom
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


43. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
400 to 700 nm
They increase because you hear a lower frequency
A constant force on a mass causes it to have a constant acceleration
That they are catalysts in the rxn because they react with the substrate and are reformed


44. At the moment of explosion of an object - what is its momementum? Why? After an explosion what is the total momentum carried by all the fragments?
Negative
7 always!!!
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Where an event took place


45. When does red litmus paper turn blue?
NO; reduction-oxidation
Where an event took place
Alkali metals = first column
In the presence of a base


46. What is a metathesis rxn?
The number of electrons emitted
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
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
Cathode; anode


47. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
That they are catalysts in the rxn because they react with the substrate and are reformed
T = (2h/g)^1/2; distance = vt
You look at what is being oxidized and reduced in the problem
Density (gravitational constant) height


48. How do you find wavelength if you known distance from adjacent crests and troughs?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Its twice that distance
-l to +l
It's weight = mg; the work would be the weight times the distance fell


49. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
Momentum
They are directly proportional
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
Faraday/electrons


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

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