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DSST Physical Sciences2

Subjects : dsst, science

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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 temperature arises during a mixture what can you conclude about the enthalpy?
The volume of the ice cube or whatever it 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
That it is negative
V/m or N/C

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
External components of the circuit
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
It can absorb light that lets other electrons fill those orbitals

3. The probability of an X-ray emission event at a given wavelength is measured by what?
NO; reduction-oxidation
Its intensity in the spectrum
The number of electrons emitted
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

4. The Ksp for a substance of AaBb is what?
External components of the circuit
[A]^a[B]^b
Helium; 4
In the presence of a base

5. 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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6. 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?
[S][2S]^2 = 4S^3
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
In the presence of a base

7. Is the work done by air resistance - positive or negative?
Positron emission
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
The force along the board to the normal force
Negative

8. The total pressure of a solution is what? Give example.
Its twice that distance
A positron or electron; when atomic number goes up you know an electron has been emitted
Gravity
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

9. What is conserved in an inellastic collision?
Momentum
Where an event took place
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Going from solid to gas phase

10. If you have circuit elements in parallel what is the same across them?
6.02 x 10^23 ions/mol
Voltage
0 Hz because they are traveling side by side at the same speed
In the presence of a base

11. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
That of static friction; there is a net accelerating force on the block once it starts to slide
A positron or electron; when atomic number goes up you know an electron has been emitted
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

12. How do you find 'g' from Newton's law of gravity?
T = 2pi/angular velocity; v/r
Helium; 4
It can absorb light that lets other electrons fill those orbitals
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

13. Light can be carried along a distance within a transparent material by means of what?
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
T = 2pi/angular velocity; v/r
Total internal reflection
The force along the board to the normal force

14. What is the law of conservation of linear momentum?
Mv = mv
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Electrons from anode and battery
V/m or N/C

15. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Only temperature of the water bath
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
F = GMm/r^2
Helium; 4

16. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Pascal (N*m^2)
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
It's weight = mg; the work would be the weight times the distance fell
1000

17. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Electron shell number
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
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

18. The temperature of a metal will not increase above its melting point until what?
P = IV
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
0 Hz because they are traveling side by side at the same speed
3+

19. The coefficient of static friction is the ratio of what?
[S][2S]^2 = 4S^3
V/m or N/C
Neutrons; atomic number
The force along the board to the normal force

20. What is the amt of energy that a frictional force generates?
The reaction between the base and water
Force times the distance over which the force acts
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

21. The volume of an object is equal to water?
Force times the distance over which the force acts
Liquid displaced by that object
It decreases; the work done by the gas in expanding decreases its internal energy
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

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. The square root of 10^anything is equal to what?
Polar
Half of the exponent
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Cathode; anode

24. The boiling point of a solution is what type of property? Which means is depends only on what?
At an equal distance behind it as the object is in front of the mirror
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Colligative; the number of solute particles present
Positron because this is known as positron decay/electron capture

25. When an element decreases its atomic number by one what is emitted?
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
Positron because this is known as positron decay/electron capture
Yes - if the particle's trail is equidistant between two adjacent anodes

26. What are the units of an electric field?
Gravity
V/m or N/C
Mag and direction
They do not differ

27. What is the equation for pressure?
Density (gravitational constant) height
Alkali metals = first column
Force times the distance over which the force acts
Faraday/electrons

28. The electrons emitted from cathode are replaced with what?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Electrons from anode and battery
(density[p])(volume)
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

29. What is the relationship between P and n in PV=nRT?
An odd number
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
They are directly proportional
Neutrons; atomic number

30. What is the magnetic quantum number?
When all the external forces = zero
-l to +l
One that has more solute particles per liter of solution
Constant to overcome the heat of fusion (solid to liquid state)

31. Acetic acid is a ______ solvent
At an equal distance behind it as the object is in front of the mirror
Alkali metals = first column
Polar
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

32. What is the spin projection quantum number?
+/- 1/2
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
3+

33. When does red litmus paper turn blue?
In the presence of a base
Energy
Mass number stays the same but the atomic number increases
Positron emission

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

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35. The range of pH in which a color change takes place in a titration depends on what?
Zero
A salt and water
When HIn is turned into In- - which is dependent upon the pKa of the indicator
At an equal distance behind it as the object is in front of the mirror

36. What is newton's second law?
Polar
The path is longer on the inclined plane so it will take object longer to reach the bottom
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
A constant force on a mass causes it to have a constant acceleration

37. The concentration of OH and H30 ions are approximately equal at what pH?
Add them together
(+)
7 always!!!
You look at what is being oxidized and reduced in the problem

38. The freezing point of an aqueous solution is what kind of property? What does this mean?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The lowest whole number ratio of moles of each element in a mole of a cmpd
Colligative: it depends on the number of solute molecules in a given volume of water
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

39. 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)
[A]^a[B]^b
H has a small atomic radius
A saturated solution in which the aqueous ions are in equilibrium with the solid

40. What is the principal quantum number (n)?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
When HIn is turned into In- - which is dependent upon the pKa of the indicator
An odd number
Electron shell number

41. 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
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
How strong a base is
Its twice that distance

42. What is different between an inclined plane and free fall?
Helium; 4
The path is longer on the inclined plane so it will take object longer to reach the bottom
Neutrons; atomic number
T = 2pi/angular velocity; v/r

43. What direction do gravity and bouyancy work? What direction does water pressure work?
It can absorb light that lets other electrons fill those orbitals
Vertically; perpendicular to all surfaces
Mv = mv
F = GMm/r^2

44. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
The reaction between the base and water
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
7 always!!!
[S][2S]^2 = 4S^3

45. When is a body in translational equilibrium?
F = GMm/r^2
0 Hz because they are traveling side by side at the same speed
When all the external forces = zero
Colligative: it depends on the number of solute molecules in a given volume of water

46. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Liquid displaced by that object
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
H = negative and S = positive

47. What is the unit for Young's Modulus?
E = (kq)/r^2
Pascal (N*m^2)
The density of the water and volume of the lead object
The number of electrons emitted

48. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
In the presence of a base
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
Accelerated by a higher voltage between the cathode and anode
B = pVg; density

49. Kb is the equilibrium constant for what?
+/- 1/2
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Total internal reflection
The reaction between the base and water

50. What happens to a negatively charged particle put between two parallel plates?
When you have central atom with six ions on it
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Total internal reflection