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DSST Physical Sciences2

Subjects : dsst, science

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. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Gravity
It will be reduced the voltage produced by the resistor which means IR; E- IR
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

2. Isotopes have diff number of ______ but same what?
Neutrons; atomic number
A salt and water
Attractive molecular forces acting between material surfaces in contact
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

3. The range of pH in which a color change takes place in a titration depends on what?
H = negative and S = positive
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Cathode; anode
+/- 1/2

4. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
That it is negative
Its intensity in the spectrum
One mole of electric charge

5. How do you find moles of a substance when you are given faradays and electrons?
F =ma and F= qE
Faraday/electrons
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

6. What does spatial resolution refer to?
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
The density of the water and volume of the lead object
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Ability to locate an event in space

7. 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?
It has a positive oxidation potential so it is easily oxidized
An odd number
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
The cross-sectional area through which the fluid flows

8. In radioactive decay the atomic number (A) and mass number (Z) must what?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
They must balance
(+)
It's weight = mg; h

9. What kind of metals react violently with water?
The force along the board to the normal force
Ability to locate an event in space
Vertically; perpendicular to all surfaces
Alkali metals = first column

10. What is the doppler equation for wavelength and frequency?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
How strong a base is
External components of the circuit
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

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

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12. The freezing point of an aqueous solution is what kind of property? What does this mean?
Colligative: it depends on the number of solute molecules in a given volume of water
F = GMm/r^2
400 to 700 nm
Isolating an atom from minerals by decomposing the minerals with an electric current

13. What does the empirical formula show?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Alkali metals = first column
That of static friction; there is a net accelerating force on the block once it starts to slide
-l to +l

14. What is the amt of energy that a frictional force generates?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
3+
[S][2S]^2 = 4S^3
Force times the distance over which the force acts

15. What type of acid and base would produce a pH closest to 7?
Strong acid and strong base/ weak acid and weak base
It will increase as well because they are directly related - only if pressure is kept constant
F = GMm/r^2
Cathode; anode

16. Terminal voltage is provided to what?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
External components of the circuit
Sp^3
When electron falls from high energy to low energy level

17. If both weight and bouyant force are dependent on g - that makes g independent of what?
1000
The volume of the ice cube or whatever it is
Energy
Alkali metals = first column

18. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Its twice that distance
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
In the presence of a base

19. 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?
Its intensity in the spectrum
H has a small atomic radius
They are directly proportional
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

20. If you have circuit elements in parallel what is the same across them?
Voltage
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
They must balance
At an equal distance behind it as the object is in front of the mirror

21. 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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22. The square root of 10^anything is equal to what?
Half of the exponent
A salt and water
You look at what is being oxidized and reduced in the problem
It's weight = mg; the work would be the weight times the distance fell

23. Equivalent mass is what?
Gravity
F = GMm/r^2
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
Isolating an atom from minerals by decomposing the minerals with an electric current

24. What direction do gravity and bouyancy work? What direction does water pressure work?
They do not differ
Vertically; perpendicular to all surfaces
Helium; 4
Strong acid and strong base/ weak acid and weak base

25. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Strong acid and strong base/ weak acid and weak base
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
When you have central atom with six ions on it
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

26. 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?
Mag and direction
Gravity
It has a positive oxidation potential so it is easily oxidized
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

27. The coefficient of kinetic friction is always lower than what? Therefore what?
The number of electrons emitted
That of static friction; there is a net accelerating force on the block once it starts to slide
7 always!!!
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

28. How would you find rate of rxn from pH 1 to pH2?
E = (kq)/r^2
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
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
In the presence of a base

29. The force on an electrical charge is what?
6.02 x 10^23 ions/mol
F =ma and F= qE
From peak to peak
Only temperature of the water bath

30. What color is above 656 nm?
The buoyant force on it; W = mg = pVg
F = GMm/r^2
Red
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

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

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32. The coefficient of static friction is the ratio of what?
The regular one
When HIn is turned into In- - which is dependent upon the pKa of the indicator
[A]^a[B]^b
The force along the board to the normal force

33. The total pressure of a solution is what? Give example.
The path is longer on the inclined plane so it will take object longer to reach the bottom
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)
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
Only temperature of the water bath

34. What is the formula for the power supplied by a battery to accelerate an electron beam?
P = IV
Strong acid and strong base/ weak acid and weak base
They increase because you hear a lower frequency
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

35. 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?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The number of electrons emitted
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

36. What is Newton's Universal Law of Gravitation?
[S][2S]^2 = 4S^3
Isolating an atom from minerals by decomposing the minerals with an electric current
F = GMm/r^2
Where an event took place

37. When does red litmus paper turn blue?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
H = negative and S = positive
Positron because this is known as positron decay/electron capture
In the presence of a base

38. What is the magnitude of the electric field produced by a point charge?
NO; reduction-oxidation
At an equal distance behind it as the object is in front of the mirror
The current is the same
E = (kq)/r^2

39. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Positive
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
1000
External components of the circuit

40. The boiling point of a solution is what type of property? Which means is depends only on what?
Colligative; the number of solute particles present
B = pVg; density
[A]^a[B]^b
They must balance

41. 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
Energy
B = pVg; density
-l to +l

42. What happens to a negatively charged particle put between two parallel plates?
Mass number stays the same but the atomic number increases
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
In the presence of a base
Add them together

43. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
Its twice that distance
When electron falls from high energy to low energy level
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

44. How do you find 'g' from Newton's law of gravity?
Helium; 4
T = (2h/g)^1/2; distance = vt
It has a positive oxidation potential so it is easily oxidized
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

45. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
Voltage
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
When HIn is turned into In- - which is dependent upon the pKa of the indicator
[S][2S]^2 = 4S^3

46. Strength of dispersion force increases with what?
They do not differ
Ease of polarizability of the molecule and thus increasing molecular weight of mass
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
A salt and water

47. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Cathode; anode
Alkali metals = first column
When HIn is turned into In- - which is dependent upon the pKa of the indicator

48. If temperature arises during a mixture what can you conclude about the enthalpy?
[A]^a[B]^b
Where an event took place
F = GMm/r^2
That it is negative

49. 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?
It will increase as well because they are directly related - only if pressure is kept constant
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 salt and water
The density of the water and volume of the lead object

50. What kind of charge is on Al?
The lowest one
Gravity
Red
3+