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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. 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?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The reaction between the base and water
The particle's charge and the magnitude of the electric field
It will increase as well because they are directly related - only if pressure is kept constant

2. The Ksp for a substance of AaBb is what?
The density of the water and volume of the lead object
Momentum
[A]^a[B]^b
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

3. What is conserved in an inellastic collision?
[A]^a[B]^b
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Momentum
Its twice that distance

4. The probability of an X-ray emission event at a given wavelength is measured by what?
An odd number
Its intensity in the spectrum
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

5. How do you find specific gravity of an object?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
7 always!!!
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 regular one

6. What is the equation for bouyant force? What is p?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Isolating an atom from minerals by decomposing the minerals with an electric current
1000
B = pVg; density

7. What is the principal quantum number (n)?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Electron shell number
F = GMm/r^2
V/m or N/C

8. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Only temperature of the water bath
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

9. The freezing point of an aqueous solution is what kind of property? What does this mean?
H has a small atomic radius
Neutrons; atomic number
Colligative: it depends on the number of solute molecules in a given volume of water
3+

10. What is the equation for pressure?
The number of electrons emitted
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
Density (gravitational constant) height
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

11. What is the magnetic quantum number?
It will increase as well because they are directly related - only if pressure is kept constant
-l to +l
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

12. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
B = pVg; density
NO; reduction-oxidation
F =ma and F= qE
The buoyant force on it; W = mg = pVg

13. A floating ice cube implies that it's weight is balanced by what?
Colligative: it depends on the number of solute molecules in a given volume of water
The buoyant force on it; W = mg = pVg
They are directly proportional
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

14. Equivalent mass is what?
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
It can absorb light that lets other electrons fill those orbitals
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
Mass number stays the same but the atomic number increases

15. 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?
It's weight = mg; h
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Force times the distance over which the force acts
They increase because you hear a lower frequency

16. 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
Its intensity in the spectrum
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Positron because this is known as positron decay/electron capture

17. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Negative
That it is negative
NO; reduction-oxidation

18. If you have circuit elements in parallel what is the same across them?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Voltage
It's weight = mg; h
Cathode; anode

19. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
Energy
Electron shell number
Cathode; anode
NO; reduction-oxidation

20. When a falling mass is at terminal speed - what is the power expended by the air resistance?
6.02 x 10^23 ions/mol
Liquid displaced by that object
Voltage
P = F(v) = mg(v -terminal)

21. What is the equation for work done?
Mg
W = F(displacement)
-l to +l
T = (2h/g)^1/2; distance = vt

22. How do you figure out the literature Ksp value of a compound?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
One mole of electric charge
Strong acid and strong base/ weak acid and weak base

23. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
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
It decreases; the work done by the gas in expanding decreases its internal energy

24. 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?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
6.02 x 10^23 ions/mol
Add them together
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

25. 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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26. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
Neutrons; atomic number
Polar
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
They do not differ

27. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
One mole of electric charge
Negative
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

28. What if the circuit elements are in series?
It's weight = mg; the work would be the weight times the distance fell
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The current is the same
In the presence of a base

29. How do you find moles of a substance when you are given faradays and electrons?
Faraday/electrons
Strong acid and strong base/ weak acid and weak base
The nucleus gains a proton and no neutrons
When you have central atom with six ions on it

30. The visible spectrum ranges from ____ to _____
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Its intensity in the spectrum
Electron shell number
400 to 700 nm

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

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32. What is the unit for Young's Modulus?
Pascal (N*m^2)
Energy
The lowest one
Yes - if the particle's trail is equidistant between two adjacent anodes

33. The electrons emitted from cathode are replaced with what?
6.02 x 10^23 ions/mol
Constant to overcome the heat of fusion (solid to liquid state)
Electrons from anode and battery
Decreasing potential energy

34. What happens to a negatively charged particle put between two parallel plates?
P = F(v) = mg(v -terminal)
Positron emission
That it is negative
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

35. What are the three separate module for tensile stress - shear stress - and compression/expansion?

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36. Why does light travel slower in an optically dense medium than through a vacuum?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Gravity
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
When you have central atom with six ions on it

37. What do electrolytic techniques involve?
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
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
Isolating an atom from minerals by decomposing the minerals with an electric current
F = GMm/r^2

38. How do you find length of time something is in flight? How do you find distance it traveled?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
V/m or N/C
It's weight = mg; h
T = (2h/g)^1/2; distance = vt

39. 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?
W = F(displacement)
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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
Zero

40. What is the spin projection quantum number?
Going from solid to gas phase
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
+/- 1/2
One mole of electric charge

41. What type of acid and base would produce a pH closest to 7?
Momentum
A salt and water
When you have central atom with six ions on it
Strong acid and strong base/ weak acid and weak base

42. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Positive
Alkali metals = first column
7 always!!!
Energy

43. Beta decay is the emission of what? How do you know what it is the emission of?
A positron or electron; when atomic number goes up you know an electron has been emitted
In the presence of a base
[A]^a[B]^b
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

44. Neither N2 or O2 have a permanent what? What does this mean?
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
Ability to locate an event in space
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
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

45. Strength of dispersion force increases with what?
Red
1000
Add them together
Ease of polarizability of the molecule and thus increasing molecular weight of mass

46. Kb is the equilibrium constant for what?
The force along the board to the normal force
The reaction between the base and water
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Voltage

47. What is weight equal to?
How strong a base is
They do not differ
Ability to locate an event in space
Mg

48. 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?
Cathode; anode
Add them together
The density of the water and volume of the lead object
How strong a base is

49. For a given flow rate - the speed of fluid flow is inversely proportional to what?
They do not differ
Isolating an atom from minerals by decomposing the minerals with an electric current
The cross-sectional area through which the fluid flows
Momentum

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

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