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. Melting occurs at what type of temperature? Why?
Constant to overcome the heat of fusion (solid to liquid state)
+/- 1/2
Its intensity in the spectrum
At an equal distance behind it as the object is in front of the mirror


2. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
The cross-sectional area through which the fluid flows
Voltage
Gravity
It can absorb light that lets other electrons fill those orbitals


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

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4. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
How strong a base is
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
Alkali metals = first column
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. The probability of an X-ray emission event at a given wavelength is measured by what?
It decreases; the work done by the gas in expanding decreases its internal energy
The element's mass number
Its intensity in the spectrum
It experiences a constant electric force of qE and will thus accelerate towards the positive plate


6. What is conserved in an inellastic collision?
(density[p])(volume)
Voltage
Momentum
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)


7. 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
P = IV
The reaction between the base and water
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2


8. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
The cross-sectional area through which the fluid flows
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Sp^3
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


9. In radioactive decay the atomic number (A) and mass number (Z) must what?
The lowest one
One that has more solute particles per liter of solution
They must balance
It will be reduced the voltage produced by the resistor which means IR; E- IR


10. What does spatial resolution refer to?
When all the external forces = zero
Gravity
Ability to locate an event in space
Alkali metals = first column


11. A nearsighted person has what type of focal length? Thus what do we do to correct this?
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
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Total internal reflection


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

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13. The square root of 10^anything is equal to what?
It can absorb light that lets other electrons fill those orbitals
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Half of the exponent
Sp^3


14. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
Isolating an atom from minerals by decomposing the minerals with an electric current
Liquid displaced by that object
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
Mag and direction


15. What is different between an inclined plane and free fall?
The path is longer on the inclined plane so it will take object longer to reach the bottom
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
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
Light is absorbed and re-emitted by the atomic structure of the optically dense medium


16. The concentration of OH and H30 ions are approximately equal at what pH?
When electron falls from high energy to low energy level
7 always!!!
A saturated solution in which the aqueous ions are in equilibrium with the solid
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


17. What is the amt of energy that a frictional force generates?
Polar
1000
External components of the circuit
Force times the distance over which the force acts


18. What is Newton's Universal Law of Gravitation?
F = GMm/r^2
V/m or N/C
6.02 x 10^23 ions/mol
+/- 1/2


19. How do you find moles of a substance when you are given faradays and electrons?
Faraday/electrons
Force times the distance over which the force acts
That they are catalysts in the rxn because they react with the substrate and are reformed
One mole of electric charge


20. If you are given density and volume how do you find mass?
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)
Mv = mv
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
(density[p])(volume)


21. The free energy change (G) must be negative when what?
F =ma and F= qE
Constant to overcome the heat of fusion (solid to liquid state)
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
H = negative and S = positive


22. 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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23. How do you find specific gravity of an object?
Mass per unit volume compared to water: so if mass is 15 g and displaces 5g of benzene the ratio of object to liquid mass is 15/5 = 3 and then times 3 by the specific gravity of benzene which is 0.7
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)
Positron emission
(+)


24. Mechanical waves in a medium fxn to transport what?
The volume of the ice cube or whatever it is
Energy
[A]^a[B]^b
The lowest one


25. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Energy
Negative
Add them together


26. In order to increase the kinetic energy of electrons - they must be what?
Alkali metals = first column
The cross-sectional area through which the fluid flows
Accelerated by a higher voltage between the cathode and anode
Ease of polarizability of the molecule and thus increasing molecular weight of mass


27. Kb is the equilibrium constant for what?
1000
Constant to overcome the heat of fusion (solid to liquid state)
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
The reaction between the base and water


28. If you have circuit elements in parallel what is the same across them?
Voltage
Mv = mv
T = 2pi/angular velocity; v/r
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c


29. In PV=nRT - if temp increases what will happen to volume?
The reaction between the base and water
Mag and direction
The current is the same
It will increase as well because they are directly related - only if pressure is kept constant


30. How do you find wavelength if you known distance from adjacent crests and troughs?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Its twice that distance
Density (gravitational constant) height
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


31. The visible spectrum ranges from ____ to _____
400 to 700 nm
You look at what is being oxidized and reduced in the problem
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


32. 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?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Add them together
The current is the same
Yes - if the particle's trail is equidistant between two adjacent anodes


33. How should the period of a waveform be calculated?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Positron emission
When HIn is turned into In- - which is dependent upon the pKa of the indicator
From peak to peak


34. How many mL is in one liter?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
It decreases; the work done by the gas in expanding decreases its internal energy
1000
Voltage


35. The electrons emitted from cathode are replaced with what?
Electrons from anode and battery
The lowest whole number ratio of moles of each element in a mole of a cmpd
NO; reduction-oxidation
B = pVg; density


36. What is the magnetic quantum number?
-l to +l
Mg
No - it increases the speed at which the rxn reaches that equilibrium
It will increase as well because they are directly related - only if pressure is kept constant


37. What is the formula for the power supplied by a battery to accelerate an electron beam?
P = IV
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
B = pVg; density
-l to +l


38. How do you balance redox rxns?

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39. The number of incident photons on the cathode affect what?
V/m or N/C
At an equal distance behind it as the object is in front of the mirror
Going from solid to gas phase
The number of electrons emitted


40. The Ksp for a substance of AaBb is what?
400 to 700 nm
Red
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
[A]^a[B]^b


41. What is the law of conservation of linear momentum?
Mv = mv
180 degrees; when there is half a wave distance in phase between two waves
V/m or N/C
Force times the distance over which the force acts


42. If asked which electron configuration of an element is most stable which one do you choose?
Positron emission
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
When you have central atom with six ions on it
The regular one


43. Heat from friction comes from what?
Colligative; the number of solute particles present
W = F(displacement)
Decreasing potential energy
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


44. The temperature of a metal will not increase above its melting point until what?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
-l to +l
The buoyant force on it; W = mg = pVg


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

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46. What if the circuit elements are in series?
7 always!!!
Faraday/electrons
The current is the same
The mass number stays the number but the atomic number decreases by one - usually resulting in another element


47. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Helium; 4
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Electrons from anode and battery
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


48. 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
W = F(displacement)
The reaction between the base and water
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


49. What are the units of an electric field?
Ability to locate an event in space
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
Negative
V/m or N/C


50. The total pressure of a solution is what? Give example.
400 to 700 nm
They do not differ
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
Ease of polarizability of the molecule and thus increasing molecular weight of mass