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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. The coefficient of kinetic friction is always lower than what? Therefore what?
Alkali metals = first column
E = (kq)/r^2
The volume of the ice cube or whatever it is
That of static friction; there is a net accelerating force on the block once it starts to slide

2. In order to guarantee a non-zero spin how many electrons are needed?
An odd number
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Red

3. The force on an electrical charge is what?
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
The volume of the ice cube or whatever it is
Red
F =ma and F= qE

4. Neither N2 or O2 have a permanent what? What does this mean?
The lowest one
One mole of electric charge
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Alkali metals = first column

5. The Ksp for a substance of AaBb is what?
P = IV
[A]^a[B]^b
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
Half of the exponent

6. What is the law of conservation of linear momentum?
Polar
Its intensity in the spectrum
Mv = mv
Accelerated by a higher voltage between the cathode and anode

7. In a rxn - how do you figure out which atom has the highest electron affinity?
Sp^3
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
Positive
P = F(v) = mg(v -terminal)

8. What happens to a negatively charged particle put between two parallel plates?
Going from solid to gas phase
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Mg
The reaction between the base and water

9. Isotopes have diff number of ______ but same what?
That they are catalysts in the rxn because they react with the substrate and are reformed
Add them together
Neutrons; atomic number
Helium; 4

10. If both weight and bouyant force are dependent on g - that makes g independent of what?
The volume of the ice cube or whatever it is
Voltage
One mole of electric charge
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

11. The phase difference corresponding to a half wave is what? When do you get destructive interference?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
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
When you have central atom with six ions on it

12. What is the relationship between P and n in PV=nRT?
Energy
Ease of polarizability of the molecule and thus increasing molecular weight of mass
1000
They are directly proportional

13. How do you find specific gravity of an object?
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
Gravity
Isolating an atom from minerals by decomposing the minerals with an electric current

14. What is the equation for work done?
H has a small atomic radius
W = F(displacement)
The lowest whole number ratio of moles of each element in a mole of a cmpd
1000

15. When a falling mass is at terminal speed - what is the power expended by the air resistance?
P = F(v) = mg(v -terminal)
Colligative: it depends on the number of solute molecules in a given volume of water
F =ma and F= qE
Cathode; anode

16. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
They do not differ
Attractive molecular forces acting between material surfaces in contact
7 always!!!

17. How do you find wavelength if you known distance from adjacent crests and troughs?
Attractive molecular forces acting between material surfaces in contact
Its twice that distance
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
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

18. If temperature arises during a mixture what can you conclude about the enthalpy?
Strong acid and strong base/ weak acid and weak base
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
+/- 1/2

19. Equivalent mass is what?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
In the presence of a base
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
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

20. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
NO; reduction-oxidation
Energy
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
Gravity

21. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
H = negative and S = positive
(+)
Liquid displaced by that object
Positive

22. What does the empirical formula show?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
When you have central atom with six ions on it
The lowest whole number ratio of moles of each element in a mole of a cmpd
Positive

23. Melting occurs at what type of temperature? Why?
The density of the water and volume of the lead object
F = GMm/r^2
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Constant to overcome the heat of fusion (solid to liquid state)

24. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
Ability to locate an event in space
NO; reduction-oxidation
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The nucleus gains a proton and no neutrons

25. What kind of metals react violently with water?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
L = wavelength/2 so L= (wavelength)(2)
When electron falls from high energy to low energy level
Alkali metals = first column

26. Why does light travel slower in an optically dense medium than through a vacuum?
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
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Helium; 4

27. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The density of the water and volume of the lead object
Zero
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
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

28. Always remember that velocity has ____ and ____
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
It will be reduced the voltage produced by the resistor which means IR; E- IR
1000
Mag and direction

29. If the equation says that the E^o has (-) voltage when being reduced - but it is being oxidized in the problem - what does the voltage then become?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
(+)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
W = F(displacement)

30. 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?
0 Hz because they are traveling side by side at the same speed
It has a positive oxidation potential so it is easily oxidized
It will be reduced the voltage produced by the resistor which means IR; E- IR
The cross-sectional area through which the fluid flows

31. The concentration of OH and H30 ions are approximately equal at what pH?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
7 always!!!
When electron falls from high energy to low energy level
When HIn is turned into In- - which is dependent upon the pKa of the indicator

32. What is Avagadro's number regarding ions/mol?
You look at what is being oxidized and reduced in the problem
Add them together
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
6.02 x 10^23 ions/mol

33. A plane mirror produces an image where?
Zero
A saturated solution in which the aqueous ions are in equilibrium with the solid
At an equal distance behind it as the object is in front of the mirror
The path is longer on the inclined plane so it will take object longer to reach the bottom

34. The boiling point of a solution is what type of property? Which means is depends only on what?
It will increase as well because they are directly related - only if pressure is kept constant
Going from solid to gas phase
Colligative; the number of solute particles present
Liquid displaced by that object

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

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36. What is different between an inclined plane and free fall?
Sp^3
The path is longer on the inclined plane so it will take object longer to reach the bottom
It will be reduced the voltage produced by the resistor which means IR; E- IR
Mass number stays the same but the atomic number increases

37. 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?
0 Hz because they are traveling side by side at the same speed
(density[p])(volume)
It has a positive oxidation potential so it is easily oxidized
A positron or electron; when atomic number goes up you know an electron has been emitted

38. What are the units of an electric field?
Going from solid to gas phase
V/m or N/C
[S][2S]^2 = 4S^3
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

39. Light can be carried along a distance within a transparent material by means of what?
6.02 x 10^23 ions/mol
Total internal reflection
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
A salt and water

40. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on 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
Going from solid to gas phase
They do not differ
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

41. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
One that has more solute particles per liter of solution
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
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
Where an event took place

42. How would you find rate of rxn from pH 1 to pH2?
P = F(v) = mg(v -terminal)
External components of the circuit
Attractive molecular forces acting between material surfaces in contact
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

43. How many mL is in one liter?
(+)
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
1000

44. 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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45. Kb is the equilibrium constant for what?
When you have central atom with six ions on it
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
It can also equal 'mg'; the compressive strength of a substance
The reaction between the base and water

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

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47. Heat from friction comes from what?
They must balance
E = (kq)/r^2
Decreasing potential energy
V/m or N/C

48. Hydrogen has what kind of standard oxidation or reduction potential?
180 degrees; when there is half a wave distance in phase between two waves
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Zero

49. The temperature of a metal will not increase above its melting point until what?
It will be reduced the voltage produced by the resistor which means IR; E- IR
Positron because this is known as positron decay/electron capture
They are directly proportional
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

50. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
Total internal reflection
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
Yes - if the particle's trail is equidistant between two adjacent anodes
The force along the board to the normal force

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DSST Physical Sciences2

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