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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. When an element decreases its atomic number by one what is emitted?
From peak to peak
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
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
Positron because this is known as positron decay/electron capture

2. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Its intensity in the spectrum
It will increase as well because they are directly related - only if pressure is kept constant
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
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

3. How do you find wavelength if you known distance from adjacent crests and troughs?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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
[S][2S]^2 = 4S^3
Its twice that distance

4. What is the equation for bouyant force? What is p?
Colligative; the number of solute particles present
B = pVg; density
Its momentum is zero because velocity is zero; zero because of conservation of momentum
That it is negative

5. Can a catalyst shift equilibrium?
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
No - it increases the speed at which the rxn reaches that equilibrium
H has a small atomic radius
When electron falls from high energy to low energy level

6. 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
It will be reduced the voltage produced by the resistor which means IR; E- IR
Cathode; anode
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

7. What kind of charge is on Al?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
3+
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
They increase because you hear a lower frequency

8. 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?
L = wavelength/2 so L= (wavelength)(2)
It's weight = mg; h
Mv = mv
It will be reduced the voltage produced by the resistor which means IR; E- IR

9. Can a charged particle be detected by two anodes?

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10. If the source of sound and the listener are traveling side by side at the same speed - what will the change in freq heard by the listener be?
The regular one
Neutrons; atomic 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
0 Hz because they are traveling side by side at the same speed

11. 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 mass number stays the number but the atomic number decreases by one - usually resulting in another element
It's weight = mg; h
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
(+)

12. Why does light travel slower in an optically dense medium than through a vacuum?
[S][2S]^2 = 4S^3
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Neutrons; atomic number
T = 2pi/angular velocity; v/r

13. If you have circuit elements in parallel what is the same across them?
The buoyant force on it; W = mg = pVg
Voltage
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
When all the external forces = zero

14. Hydrogen has what kind of standard oxidation or reduction potential?
Where an event took place
Gravity
Zero
Electron shell number

15. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
Sp^3
1000
At an equal distance behind it as the object is in front of the mirror
They do not differ

16. What is the unit for Young's Modulus?
P = IV
Pascal (N*m^2)
Electron shell number
Only temperature of the water bath

17. What is newton's second law?
Energy
Strong acid and strong base/ weak acid and weak base
A constant force on a mass causes it to have a constant acceleration
0 Hz because they are traveling side by side at the same speed

18. 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?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Constant to overcome the heat of fusion (solid to liquid state)
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 also equal 'mg'; the compressive strength of a substance

19. How do you find specific gravity of an object?
Where an event took place
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
Isolating an atom from minerals by decomposing the minerals with an electric current
Red

20. What is sublimation?
A positron or electron; when atomic number goes up you know an electron has been emitted
P = F(v) = mg(v -terminal)
Mg
Going from solid to gas phase

21. 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?
Zero
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 has a positive oxidation potential so it is easily oxidized
Its intensity in the spectrum

22. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
The lowest whole number ratio of moles of each element in a mole of a cmpd
The density of the water and volume of the lead object
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

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

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24. Heat from friction comes from what?
Liquid displaced by that object
Decreasing potential energy
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
It can absorb light that lets other electrons fill those orbitals

25. A pendulum moves under the influence of what?
7 always!!!
The lowest one
V/m or N/C
Gravity

26. Friction is caused by what?
0 Hz because they are traveling side by side at the same speed
One that has more solute particles per liter of solution
The regular one
Attractive molecular forces acting between material surfaces in contact

27. What is a metathesis rxn?
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
(density[p])(volume)
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 are directly proportional

28. What is the equation for work done?
W = F(displacement)
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
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

29. Nuclear masses can be approximated from what?

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30. How do you figure out the literature Ksp value of a compound?
[S][2S]^2 = 4S^3
Alkali metals = first column
A saturated solution in which the aqueous ions are in equilibrium with the solid
One mole of electric charge

31. What is conserved in an inellastic collision?
Momentum
Energy
They do not differ
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

32. What are the units of an electric field?
V/m or N/C
Pascal (N*m^2)
-l to +l
Electron shell number

33. 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
Gravity
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
The nucleus gains a proton and no neutrons

34. What direction do gravity and bouyancy work? What direction does water pressure work?
They must balance
Vertically; perpendicular to all surfaces
It can absorb light that lets other electrons fill those orbitals
The cross-sectional area through which the fluid flows

35. What is the equation for a period (T)? What is the equation for angular velocity?
Force times the distance over which the force acts
It's weight = mg; the work would be the weight times the distance fell
Accelerated by a higher voltage between the cathode and anode
T = 2pi/angular velocity; v/r

36. What happens if an atom undergoes positron decay or electron capture?
It's weight = mg; the work would be the weight times the distance fell
The element's mass number
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

37. What is the magnitude of the electric field produced by a point charge?
An odd number
The nucleus gains a proton and no neutrons
In the presence of a base
E = (kq)/r^2

38. In radioactive decay the atomic number (A) and mass number (Z) must what?
In the presence of a base
The volume of the ice cube or whatever it is
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
They must balance

39. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
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
[A]^a[B]^b
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
One that has more solute particles per liter of solution

40. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
P = IV
When HIn is turned into In- - which is dependent upon the pKa of the indicator
It decreases; the work done by the gas in expanding decreases its internal energy
Cathode; anode

41. How do you find 'g' from Newton's law of gravity?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Mag and direction
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

42. What is the principal quantum number (n)?
Electron shell 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
3+
Liquid displaced by that object

43. The total pressure of a solution is what? Give example.
L = wavelength/2 so L= (wavelength)(2)
H = negative and S = positive
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
Positive

44. The volume of an object is equal to water?
You look at what is being oxidized and reduced in the problem
Strong acid and strong base/ weak acid and weak base
Liquid displaced by that object
Faraday/electrons

45. A floating ice cube implies that it's weight is balanced by what?
Mv = mv
The buoyant force on it; W = mg = pVg
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Red

46. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
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
Voltage
(+)

47. How would you find rate of rxn from pH 1 to pH2?
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 can absorb light that lets other electrons fill those orbitals
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
Where an event took place

48. What is the relationship between P and n in PV=nRT?
The nucleus gains a proton and no neutrons
Positron emission
H = negative and S = positive
They are directly proportional

49. The square root of 10^anything is equal to what?
6.02 x 10^23 ions/mol
Half of the exponent
180 degrees; when there is half a wave distance in phase between two waves
NO; reduction-oxidation

50. The basicity constant Kb measures what?
How strong a base is
Electrons from anode and battery
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
An odd number