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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.
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. What if the circuit elements are in series?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Attractive molecular forces acting between material surfaces in contact
The current is the same
+/- 1/2

2. 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?
400 to 700 nm
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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
It's weight = mg; h

3. What does spatial resolution refer to?
Ability to locate an event in space
Electrons from anode and battery
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
When you have central atom with six ions on it

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

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5. What happens to a negatively charged particle put between two parallel plates?
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
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
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 force along the board to the normal force

6. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
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]^a[B]^b
Its momentum is zero because velocity is zero; zero because of conservation of momentum
That they are catalysts in the rxn because they react with the substrate and are reformed

7. What is the equation for bouyant force? What is p?
In the presence of a base
B = pVg; density
When HIn is turned into In- - which is dependent upon the pKa of the indicator
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

8. When you are trying to calculate a galvanic cell's emf - what do you look at?
You look at what is being oxidized and reduced in the problem
Toward the side with more gaseous molecules; towards the side that doesn't give off as much heat (remember heat is given off when molecules are formed and thus (-) enthalpy)
The density of the water and volume of the lead object
The element's mass number

9. Why are bonds between H and another atom shorter compared to most?
H has a small atomic radius
Energy
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
7 always!!!

10. What is the principal quantum number (n)?
It has a positive oxidation potential so it is easily oxidized
Positron because this is known as positron decay/electron capture
Electron shell number
When all the external forces = zero

11. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
Gravity
Voltage
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
The lowest whole number ratio of moles of each element in a mole of a cmpd

12. What is one faraday equal to?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
One mole of electric charge
-l to +l
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

13. Neither N2 or O2 have a permanent what? What does this mean?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
P = IV
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

14. The phase difference corresponding to a half wave is what? When do you get destructive interference?
Sp^3
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
180 degrees; when there is half a wave distance in phase between two waves
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

15. A plane mirror produces an image where?
Mg
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
The lowest one
At an equal distance behind it as the object is in front of the mirror

16. The Ksp for a substance of AaBb is what?
B = pVg; density
[A]^a[B]^b
In the presence of a base
L = wavelength/2 so L= (wavelength)(2)

17. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
The buoyant force on it; W = mg = pVg
P = F(v) = mg(v -terminal)
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
Sp^3

18. What is newton's second law?
A salt and water
Yes - if the particle's trail is equidistant between two adjacent anodes
Attractive molecular forces acting between material surfaces in contact
A constant force on a mass causes it to have a constant acceleration

19. 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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20. What kind of geometry is octahedral?
When you have central atom with six ions on it
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
(density[p])(volume)
[A]^a[B]^b

21. A nearsighted person has what type of focal length? Thus what do we do to correct this?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The cross-sectional area through which the fluid flows
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The particle's charge and the magnitude of the electric field

22. What is the relationship between P and n in PV=nRT?
Toward the side with more gaseous molecules; towards the side that doesn't give off as much heat (remember heat is given off when molecules are formed and thus (-) enthalpy)
180 degrees; when there is half a wave distance in phase between two waves
They are directly proportional
The reaction between the base and water

23. 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?
Neutrons; atomic number
An odd number
0 Hz because they are traveling side by side at the same speed
A constant force on a mass causes it to have a constant acceleration

24. The visible spectrum ranges from ____ to _____
In the presence of a base
Cathode; anode
Voltage
400 to 700 nm

25. In radioactive decay the atomic number (A) and mass number (Z) must what?
It will increase as well because they are directly related - only if pressure is kept constant
Voltage
400 to 700 nm
They must balance

26. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
A constant force on a mass causes it to have a constant acceleration
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
They do not differ
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

27. How do you find length of time something is in flight? How do you find distance it traveled?
T = (2h/g)^1/2; distance = vt
It decreases; the work done by the gas in expanding decreases its internal energy
Density (gravitational constant) height
Electron shell number

28. A floating ice cube implies that it's weight is balanced by what?
The buoyant force on it; W = mg = pVg
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
L = wavelength/2 so L= (wavelength)(2)
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

29. Hydrogen has what kind of standard oxidation or reduction potential?
Zero
L = wavelength/2 so L= (wavelength)(2)
Positive
Density (gravitational constant) height

30. The total pressure of a solution is what? Give example.
Going from solid to gas phase
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's weight = mg; h
P = IV

31. What is the magnetic quantum number?
-l to +l
They increase because you hear a lower frequency
It can also equal 'mg'; the compressive strength of a substance
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

32. F in the Young's modulus equation can also equal what? What is E?

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33. What is Newton's Universal Law of Gravitation?
They do not differ
Ease of polarizability of the molecule and thus increasing molecular weight of mass
F = GMm/r^2
V/m or N/C

34. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
They increase because you hear a lower frequency
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
E = (kq)/r^2
The volume of the ice cube or whatever it is

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

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36. What is sublimation?
-l to +l
1000
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
Going from solid to gas phase

37. Kb is the equilibrium constant for what?
[S][2S]^2 = 4S^3
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
The reaction between the base and water
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

38. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
[S][2S]^2 = 4S^3
Mv = mv
When electron falls from high energy to low energy level
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

39. What happens if an atom undergoes positron decay or electron capture?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
It will increase as well because they are directly related - only if pressure is kept constant
Mag and direction
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

40. The probability of an X-ray emission event at a given wavelength is measured by what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Its intensity in the spectrum
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
No - it increases the speed at which the rxn reaches that equilibrium

41. The coefficient of kinetic friction is always lower than what? Therefore what?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Positron emission
They increase because you hear a lower frequency
That of static friction; there is a net accelerating force on the block once it starts to slide

42. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
E = (kq)/r^2
Red
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
NO; reduction-oxidation

43. When a falling mass is at terminal speed - what is the power expended by the air resistance?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
P = F(v) = mg(v -terminal)
How strong a base is
A salt and water

44. Beta decay is the same as what?
It's weight = mg; the work would be the weight times the distance fell
It decreases; the work done by the gas in expanding decreases its internal energy
Alkali metals = first column
Positron emission

45. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
(density[p])(volume)
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
V/m or N/C
Positive

46. Acetic acid is a ______ solvent
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Polar
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

47. What is the law of conservation of linear momentum?
Mv = mv
F = GMm/r^2
6.02 x 10^23 ions/mol
Liquid displaced by that object

48. When is a body in translational equilibrium?
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
When all the external forces = zero
Total internal reflection
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

49. What is Avagadro's number regarding ions/mol?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Its twice that distance
6.02 x 10^23 ions/mol
[A]^a[B]^b

50. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
Only temperature of the water bath
Add them together
Mag and direction
The lowest one