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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. 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?
Pascal (N*m^2)
H = negative and S = positive
Add them together
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

2. Strength of dispersion force increases with what?
The current is the same
Ease of polarizability of the molecule and thus increasing molecular weight of mass
The path is longer on the inclined plane so it will take object longer to reach the bottom
L = wavelength/2 so L= (wavelength)(2)

3. In order to increase the kinetic energy of electrons - they must be what?
Mg
Accelerated by a higher voltage between the cathode and anode
H = negative and S = positive
From peak to peak

4. 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?
The nucleus gains a proton and no neutrons
(+)
Zero
Pascal (N*m^2)

5. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
V/m or N/C
Polar
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

6. What is the equation for bouyant force? What is p?
L = wavelength/2 so L= (wavelength)(2)
When all the external forces = zero
B = pVg; density
It's weight = mg; the work would be the weight times the distance fell

7. Half-sine wave shape is what kind of wavelength with regards to length?
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
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
L = wavelength/2 so L= (wavelength)(2)
Mg

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

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

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10. Why are bonds between H and another atom shorter compared to most?
H has a small atomic radius
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
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
P = IV

11. What is the angular momentum quantum number (l)? It is the same as what? What does an S orbital appear to look like? What would it's (l) be?
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 number of electrons emitted
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
A salt and water

12. When does red litmus paper turn blue?
L = wavelength/2 so L= (wavelength)(2)
The force along the board to the normal force
In the presence of a base
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

13. The Ksp for a substance of AaBb is what?
H has a small atomic radius
They increase because you hear a lower frequency
[A]^a[B]^b
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

14. 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?
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
The lowest one
The current is the same

15. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
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
From peak to peak
NO; reduction-oxidation

16. What energy conversion describes best what takes place in a battery-powered resistive circuit?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
(+)
Mag and direction
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

17. Melting occurs at what type of temperature? Why?
Constant to overcome the heat of fusion (solid to liquid state)
Half of the exponent
It's weight = mg; the work would be the weight times the distance fell
Add them together

18. When an element decreases its atomic number by one what is emitted?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Positron because this is known as positron decay/electron capture
E = (kq)/r^2
Ability to locate an event in space

19. 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
E = (kq)/r^2
An odd number
The buoyant force on it; W = mg = pVg

20. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
It decreases; the work done by the gas in expanding decreases its internal energy
Add them together
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

21. What direction do gravity and bouyancy work? What direction does water pressure work?
Where an event took place
Vertically; perpendicular to all surfaces
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Polar

22. The coefficient of kinetic friction is always lower than what? Therefore what?
You look at what is being oxidized and reduced in the problem
That of static friction; there is a net accelerating force on the block once it starts to slide
The element's mass number
They must balance

23. What is the amt of energy that a frictional force generates?
Going from solid to gas phase
Force times the distance over which the force acts
[A]^a[B]^b
When HIn is turned into In- - which is dependent upon the pKa of the indicator

24. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Zero
Accelerated by a higher voltage between the cathode and anode
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The element's mass number

25. Mechanical waves in a medium fxn to transport what?
Energy
The lowest one
Density (gravitational constant) height
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

26. What is the spin projection quantum number?
+/- 1/2
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Yes - if the particle's trail is equidistant between two adjacent anodes
One that has more solute particles per liter of solution

27. Kb is the equilibrium constant for what?
The reaction between the base and water
From peak to peak
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
No - it increases the speed at which the rxn reaches that equilibrium

28. The total pressure of a solution is what? Give example.
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
Strong acid and strong base/ weak acid and weak base
T = (2h/g)^1/2; distance = vt
Zero

29. Beta decay is the emission of what? How do you know what it is the emission of?
Cathode; anode
A positron or electron; when atomic number goes up you know an electron has been emitted
It decreases; the work done by the gas in expanding decreases its internal energy
It can also equal 'mg'; the compressive strength of a substance

30. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
From peak to peak
It will increase as well because they are directly related - only if pressure is kept constant
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

31. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
Positive
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
A constant force on a mass causes it to have a constant acceleration
H = negative and S = positive

32. When a falling mass is at terminal speed - what is the power expended by the air resistance?
It has a positive oxidation potential so it is easily oxidized
The element's mass number
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
P = F(v) = mg(v -terminal)

33. Friction is caused by what?
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
Attractive molecular forces acting between material surfaces in contact
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

34. The visible spectrum ranges from ____ to _____
It will be reduced the voltage produced by the resistor which means IR; E- IR
Where an event took place
400 to 700 nm
The path is longer on the inclined plane so it will take object longer to reach the bottom

35. What is the magnetic quantum number?
-l to +l
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
E = (kq)/r^2
The volume of the ice cube or whatever it is

36. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
The nucleus gains a proton and no neutrons
Gravity
Its intensity in the spectrum
H has a small atomic radius

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

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38. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
Pascal (N*m^2)
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
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
The buoyant force on it; W = mg = pVg

39. The basicity constant Kb measures what?
Where an event took place
How strong a base is
Positron because this is known as positron decay/electron capture
Sp^3

40. The range of pH in which a color change takes place in a titration depends on what?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Half of the exponent
Going from solid to gas phase
Isolating an atom from minerals by decomposing the minerals with an electric current

41. What is a metathesis rxn?
Zero
It will increase as well because they are directly related - only if pressure is kept constant
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
F =ma and F= qE

42. Beta decay is the same as what?
Pascal (N*m^2)
Positron emission
V/m or N/C
Mass number stays the same but the atomic number increases

43. 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?
The density of the water and volume of the lead object
Colligative; the number of solute particles present
An odd number
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

44. The probability of an X-ray emission event at a given wavelength is measured by what?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Its intensity in the spectrum
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 nucleus gains a proton and no neutrons

45. The phase difference corresponding to a half wave is what? When do you get destructive interference?
180 degrees; when there is half a wave distance in phase between two waves
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Red
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

46. The coefficient of static friction is the ratio of what?
Liquid displaced by that object
The force along the board to the normal force
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
It can absorb light that lets other electrons fill those orbitals

47. When is a body in translational equilibrium?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
When all the external forces = zero
It can absorb light that lets other electrons fill those orbitals
6.02 x 10^23 ions/mol

48. How do you find length of time something is in flight? How do you find distance it traveled?
Negative
T = (2h/g)^1/2; distance = vt
1000
Sp^3

49. How do you find specific gravity of an object?
Going from solid to gas phase
Neutrons; atomic number
Decreasing potential energy
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

50. What is Newton's Universal Law of Gravitation?
Pascal (N*m^2)
F = GMm/r^2
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Its twice that distance