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. The volume of an object is equal to water?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
The reaction between the base and water
Liquid displaced by that object
Strong acid and strong base/ weak acid and weak base


2. 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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3. What is the magnitude of the electric field produced by a point charge?
Total internal reflection
1000
Negative
E = (kq)/r^2


4. Is the work done by air resistance - positive or negative?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Negative
Pascal (N*m^2)
400 to 700 nm


5. 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?
An odd number
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
F = GMm/r^2
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


6. 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?
7 always!!!
Add them together
Mg
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens


7. How do you figure out the literature Ksp value of a compound?
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
Ease of polarizability of the molecule and thus increasing molecular weight of mass
It can also equal 'mg'; the compressive strength of a substance
A saturated solution in which the aqueous ions are in equilibrium with the solid


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

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9. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
Yes - if the particle's trail is equidistant between two adjacent anodes
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Alkali metals = first column
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles


10. What color is above 656 nm?
F =ma and F= qE
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
Red
They are directly proportional


11. Half-sine wave shape is what kind of wavelength with regards to length?
Half of the exponent
Positron emission
Mg
L = wavelength/2 so L= (wavelength)(2)


12. How do you balance redox rxns?

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13. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
F = GMm/r^2
They increase because you hear a lower frequency
400 to 700 nm
It's weight = mg; the work would be the weight times the distance fell


14. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
T = 2pi/angular velocity; v/r
Neutrons; atomic number
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
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


15. The freezing point of an aqueous solution is what kind of property? What does this mean?
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
Colligative: it depends on the number of solute molecules in a given volume of water
Mass number stays the same but the atomic number increases
They do not differ


16. The boiling point of a solution is what type of property? Which means is depends only on what?
Gravity
The element's mass number
Colligative; the number of solute particles present
L = wavelength/2 so L= (wavelength)(2)


17. What are the units of an electric field?
The lowest one
V/m or N/C
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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


18. Terminal voltage is provided to what?
External components of the circuit
Colligative: it depends on the number of solute molecules in a given volume of water
Decreasing potential energy
How strong a base is


19. What is the equation for bouyant force? What is p?
B = pVg; density
It's weight = mg; the work would be the weight times the distance fell
Pascal (N*m^2)
One that has more solute particles per liter of solution


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
L = wavelength/2 so L= (wavelength)(2)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Only temperature of the water bath


21. What is sublimation?
Going from solid to gas phase
They must balance
F = GMm/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


22. What is Avagadro's number regarding ions/mol?
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
6.02 x 10^23 ions/mol
Vertically; perpendicular to all surfaces
Sp^3


23. 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?
A positron or electron; when atomic number goes up you know an electron has been emitted
-l to +l
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Constant to overcome the heat of fusion (solid to liquid state)


24. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
Neutrons; atomic number
The lowest one
They do not differ
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure


25. What is conserved in an inellastic collision?
Momentum
One mole of electric charge
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Positron because this is known as positron decay/electron capture


26. The closer the spacing of the anode wire - the better one can specify what?
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
Where an event took place
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
Its momentum is zero because velocity is zero; zero because of conservation of momentum


27. In order to increase the kinetic energy of electrons - they must be what?
Momentum
Accelerated by a higher voltage between the cathode and anode
In the presence of a base
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c


28. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Momentum
P = F(v) = mg(v -terminal)
Only temperature of the water bath
That they are catalysts in the rxn because they react with the substrate and are reformed


29. The force on an electrical charge is what?
F =ma and F= qE
In the presence of a base
Where an event took place
The cross-sectional area through which the fluid flows


30. Always remember that velocity has ____ and ____
Decreasing potential energy
Mag and direction
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
It has a positive oxidation potential so it is easily oxidized


31. If temperature arises during a mixture what can you conclude about the enthalpy?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Pascal (N*m^2)
Its momentum is zero because velocity is zero; zero because of conservation of momentum
That it is negative


32. When an element decreases its atomic number by one what is emitted?
A positron or electron; when atomic number goes up you know an electron has been emitted
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Mv = mv
Positron because this is known as positron decay/electron capture


33. What kind of metals react violently with water?
Electrons from anode and battery
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Density (gravitational constant) height
Alkali metals = first column


34. 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
Sp^3
The cross-sectional area through which the fluid flows
Total internal reflection


35. Beta decay is the same as what?
Positron emission
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Helium; 4
W = F(displacement)


36. The total pressure of a solution is what? Give example.
P = IV
The current is the same
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 positron or electron; when atomic number goes up you know an electron has been emitted


37. How should the period of a waveform be calculated?
[A]^a[B]^b
From peak to peak
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
The volume of the ice cube or whatever it is


38. A plane mirror produces an image where?
(+)
Density (gravitational constant) height
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
At an equal distance behind it as the object is in front of the mirror


39. 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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40. The probability of an X-ray emission event at a given wavelength is measured by what?
Its intensity in the spectrum
That it is negative
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
NO; reduction-oxidation


41. Isotopes have diff number of ______ but same what?
Going from solid to gas phase
Neutrons; atomic number
0 Hz because they are traveling side by side at the same speed
One mole of electric charge


42. What is the magnetic quantum number?
-l to +l
Red
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
Positive


43. 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
They must balance
Electron shell number
Half of the exponent


44. 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?
It will be reduced the voltage produced by the resistor which means IR; E- IR
The current is the same
External components of the circuit
Colligative; the number of solute particles present


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

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46. What is the amt of energy that a frictional force generates?
Decreasing potential energy
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
The number of electrons emitted
Force times the distance over which the force acts


47. Melting occurs at what type of temperature? Why?
Constant to overcome the heat of fusion (solid to liquid state)
Mg
The buoyant force on it; W = mg = pVg
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2


48. What is the principal quantum number (n)?
L = wavelength/2 so L= (wavelength)(2)
Isolating an atom from minerals by decomposing the minerals with an electric current
When you have central atom with six ions on it
Electron shell number


49. What type of acid and base would produce a pH closest to 7?
Helium; 4
They do not differ
Strong acid and strong base/ weak acid and weak base
Constant to overcome the heat of fusion (solid to liquid state)


50. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
When electron falls from high energy to low energy level
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Helium; 4
It can absorb light that lets other electrons fill those orbitals