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 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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2. A floating ice cube implies that it's weight is balanced by what?
The buoyant force on it; W = mg = pVg
NO; reduction-oxidation
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
That they are catalysts in the rxn because they react with the substrate and are reformed


3. What is the magnitude of the electric field produced by a point charge?
T = (2h/g)^1/2; distance = vt
When electron falls from high energy to low energy level
They increase because you hear a lower frequency
E = (kq)/r^2


4. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
When you have central atom with six ions on it
The lowest one
(+)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant


5. What happens if an atom undergoes positron decay or electron capture?
Electrons from anode and battery
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
They must balance


6. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
One that has more solute particles per liter of solution
(+)
Only temperature of the water bath
An odd number


7. Beta decay is the emission of what? How do you know what it is the emission of?
From peak to peak
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Mv = mv
A positron or electron; when atomic number goes up you know an electron has been emitted


8. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
Total internal reflection
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
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
Half of the exponent


9. If you have circuit elements in parallel what is the same across them?
Voltage
They do not differ
You look at what is being oxidized and reduced in the problem
It will be reduced the voltage produced by the resistor which means IR; E- IR


10. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
Positive
That it is negative
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 buoyant force on it; W = mg = pVg


11. What energy conversion describes best what takes place in a battery-powered resistive circuit?
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
F = GMm/r^2
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Where an event took place


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

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

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14. If asked which electron configuration of an element is most stable which one do you choose?
The regular one
The lowest one
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
An odd number


15. The phase difference corresponding to a half wave is what? When do you get destructive interference?
One mole of electric charge
Colligative: it depends on the number of solute molecules in a given volume of water
180 degrees; when there is half a wave distance in phase between two waves
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


16. How do you balance redox rxns?

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17. 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?
The reaction between the base and water
Add them together
Voltage
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed


18. The concentration of OH and H30 ions are approximately equal at what pH?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
A positron or electron; when atomic number goes up you know an electron has been emitted
7 always!!!
A salt and water


19. What is usually conserved over oscillation periods?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Energy
A saturated solution in which the aqueous ions are in equilibrium with the solid
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting


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

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21. What type of acid and base would produce a pH closest to 7?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Strong acid and strong base/ weak acid and weak base
The number of electrons emitted


22. The total pressure of a solution is what? Give example.
Its intensity in the spectrum
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
They increase because you hear a lower frequency
It will be reduced the voltage produced by the resistor which means IR; E- IR


23. 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?
0 Hz because they are traveling side by side at the same speed
The density of the water and volume of the lead object
It can also equal 'mg'; the compressive strength of a substance
They increase because you hear a lower frequency


24. 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?
A positron or electron; when atomic number goes up you know an electron has been emitted
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
Liquid displaced by that object
The mass number stays the number but the atomic number decreases by one - usually resulting in another element


25. A pendulum moves under the influence of what?
Add them together
Gravity
Attractive molecular forces acting between material surfaces in contact
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant


26. In Bohr model of atom when is energy emitted?
They do not differ
In the presence of a base
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
When electron falls from high energy to low energy level


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

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28. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Sp^3
Electron shell number
Half of the exponent
External components of the circuit


29. What is one faraday equal to?
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
One mole of electric charge
The buoyant force on it; W = mg = pVg
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


30. If temperature arises during a mixture what can you conclude about the enthalpy?
Colligative: it depends on the number of solute molecules in a given volume of 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
That it is negative
NO; reduction-oxidation


31. What are the units of an electric field?
That it is negative
Force times the distance over which the force acts
From peak to peak
V/m or N/C


32. How do you figure out the literature Ksp value of a compound?
Pascal (N*m^2)
Mv = mv
A saturated solution in which the aqueous ions are in equilibrium with the solid
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


33. The boiling point of a solution is what type of property? Which means is depends only on what?
(density[p])(volume)
Yes - if the particle's trail is equidistant between two adjacent anodes
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Colligative; the number of solute particles present


34. If the standard potential for a rxn is negative when it is being reduced (thus a negative reduction potential) that means that the resulting atom has what?
The element's mass number
It has a positive oxidation potential so it is easily oxidized
P = IV
One mole of electric charge


35. What is the equation for a period (T)? What is the equation for angular velocity?
They do not differ
An odd number
Mag and direction
T = 2pi/angular velocity; v/r


36. The visible spectrum ranges from ____ to _____
It decreases; the work done by the gas in expanding decreases its internal energy
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
400 to 700 nm
Its momentum is zero because velocity is zero; zero because of conservation of momentum


37. 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
Yes - if the particle's trail is equidistant between two adjacent anodes
A saturated solution in which the aqueous ions are in equilibrium with the solid
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R


38. The closer the spacing of the anode wire - the better one can specify what?
Sp^3
Where an event took place
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
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


39. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Add them together
It can absorb light that lets other electrons fill those orbitals
Liquid displaced by that object
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens


40. What does spatial resolution refer to?
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
Ability to locate an event in space
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
A constant force on a mass causes it to have a constant acceleration


41. What is the unit for Young's Modulus?
(+)
From peak to peak
Pascal (N*m^2)
It can also equal 'mg'; the compressive strength of a substance


42. What is weight equal to?
Mg
At an equal distance behind it as the object is in front of the mirror
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
NO; reduction-oxidation


43. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
Only temperature of the water bath
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
F = GMm/r^2
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)


44. Light can be carried along a distance within a transparent material by means of what?
They are directly proportional
Colligative: it depends on the number of solute molecules in a given volume of water
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
Total internal reflection


45. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
External components of the circuit
Positive
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
V/m or N/C


46. The coefficient of kinetic friction is always lower than what? Therefore what?
It's weight = mg; the work would be the weight times the distance fell
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Only temperature of the water bath
That of static friction; there is a net accelerating force on the block once it starts to slide


47. 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?
Neutrons; atomic number
Its momentum is zero because velocity is zero; zero because of conservation of momentum
0 Hz because they are traveling side by side at the same speed
V/m or N/C


48. What is the doppler equation for wavelength and frequency?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
The current is the same
F =ma and F= qE
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R


49. In order to guarantee a non-zero spin how many electrons are needed?
An odd number
A saturated solution in which the aqueous ions are in equilibrium with the solid
Add them together
Energy


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

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