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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. If you are given density and volume how do you find mass?
F =ma and F= qE
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
At an equal distance behind it as the object is in front of the mirror
(density[p])(volume)

2. The visible spectrum ranges from ____ to _____
Positron because this is known as positron decay/electron capture
Sp^3
400 to 700 nm
Vertically; perpendicular to all surfaces

3. What is conserved in an inellastic collision?
Momentum
Density (gravitational constant) height
At an equal distance behind it as the object is in front of the mirror
Energy

4. When something is falling what is the force acting on it? Thus what would be the work done?

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5. What does spatial resolution refer to?
They must balance
Positron emission
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Ability to locate an event in space

6. What is the unit for Young's Modulus?
Electrons from anode and battery
Pascal (N*m^2)
Yes - if the particle's trail is equidistant between two adjacent anodes
Sp^3

7. Half-sine wave shape is what kind of wavelength with regards to length?
It has a positive oxidation potential so it is easily oxidized
L = wavelength/2 so L= (wavelength)(2)
The path is longer on the inclined plane so it will take object longer to reach the bottom
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. The temperature of a metal will not increase above its melting point until 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
Vertically; perpendicular to all surfaces
400 to 700 nm
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

9. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Polar
Pascal (N*m^2)
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
The volume of the ice cube or whatever it is

10. What is the magnetic quantum number?
One mole of electric charge
Add them together
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
-l to +l

11. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
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
P = IV
Alkali metals = first column

12. What type of acid and base would produce a pH closest to 7?
It can absorb light that lets other electrons fill those orbitals
Strong acid and strong base/ weak acid and weak base
The nucleus gains a proton and no neutrons
[A]^a[B]^b

13. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
The element's mass number
They increase because you hear a lower frequency
A saturated solution in which the aqueous ions are in equilibrium with the solid

14. 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?
From peak to peak
W = F(displacement)
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
Its momentum is zero because velocity is zero; zero because of conservation of momentum

15. What is Newton's Universal Law of Gravitation?
The path is longer on the inclined plane so it will take object longer to reach the bottom
When electron falls from high energy to low energy level
F = GMm/r^2
Polar

16. What is the formula for the power supplied by a battery to accelerate an electron beam?
P = IV
V/m or N/C
The regular one
Strong acid and strong base/ weak acid and weak base

17. In Bohr model of atom when is energy emitted?
It will be reduced the voltage produced by the resistor which means IR; E- IR
When electron falls from high energy to low energy level
They increase because you hear a lower frequency
The path is longer on the inclined plane so it will take object longer to reach the bottom

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

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19. What kind of geometry is octahedral?
W = F(displacement)
When you have central atom with six ions on it
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Force times the distance over which the force acts

20. How would you find rate of rxn from pH 1 to pH2?
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
L = wavelength/2 so L= (wavelength)(2)
E = (kq)/r^2
Attractive molecular forces acting between material surfaces in contact

21. 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
That it is negative
Half of the exponent
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

22. What is the magnitude of the electric field produced by a point charge?
Mv = mv
Total internal reflection
Colligative; the number of solute particles present
E = (kq)/r^2

23. What is newton's second law?
A constant force on a mass causes it to have a constant acceleration
It decreases; the work done by the gas in expanding decreases its internal energy
NO; reduction-oxidation
Pascal (N*m^2)

24. When does red litmus paper turn blue?
3+
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
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
In the presence of a base

25. Melting occurs at what type of temperature? Why?
Energy
Constant to overcome the heat of fusion (solid to liquid state)
The density of the water and volume of the lead object
[S][2S]^2 = 4S^3

26. How do you find wavelength if you known distance from adjacent crests and troughs?
They increase because you hear a lower frequency
Its twice that distance
External components of the circuit
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

27. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
That it is negative
+/- 1/2
The nucleus gains a proton and no neutrons
It can absorb light that lets other electrons fill those orbitals

28. What are the units of an electric field?
It will be reduced the voltage produced by the resistor which means IR; E- IR
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
+/- 1/2
V/m or N/C

29. Strength of dispersion force increases with what?
H = negative and S = positive
T = (2h/g)^1/2; distance = vt
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Neutrons; atomic number

30. The freezing point of an aqueous solution is what kind of property? What does this mean?
Total internal reflection
No - it increases the speed at which the rxn reaches that equilibrium
Colligative: it depends on the number of solute molecules in a given volume of water
A positron or electron; when atomic number goes up you know an electron has been emitted

31. How do you balance redox rxns?

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32. The electrons emitted from cathode are replaced with what?
180 degrees; when there is half a wave distance in phase between two waves
400 to 700 nm
Energy
Electrons from anode and battery

33. When an element decreases its atomic number by one what is emitted?
1000
Positron because this is known as positron decay/electron capture
Zero
They must balance

34. Acetic acid is a ______ solvent
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
3+
Polar
400 to 700 nm

35. The Ksp for a substance of AaBb 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
[A]^a[B]^b
+/- 1/2
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

36. What is the principal quantum number (n)?
Ability to locate an event in space
Electron shell number
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
That of static friction; there is a net accelerating force on the block once it starts to slide

37. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
180 degrees; when there is half a wave distance in phase between two waves
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
An odd number
NO; reduction-oxidation

38. In PV=nRT - if temp increases what will happen to 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
It will increase as well because they are directly related - only if pressure is kept constant
Positive
One mole of electric charge

39. What direction do gravity and bouyancy work? What direction does water pressure work?
It has a positive oxidation potential so it is easily oxidized
400 to 700 nm
Vertically; perpendicular to all surfaces
The element's mass number

40. When you are trying to calculate a galvanic cell's emf - what do you look at?
They do not differ
Add them together
B = pVg; density
You look at what is being oxidized and reduced in the problem

41. What is one faraday equal to?
One mole of electric charge
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
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
From peak to peak

42. What is different between an inclined plane and free fall?
Colligative; the number of solute particles present
That it is negative
The path is longer on the inclined plane so it will take object longer to reach the bottom
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

43. The concentration of OH and H30 ions are approximately equal at what pH?
That it is negative
Mag and direction
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
7 always!!!

44. Hydrogen has what kind of standard oxidation or reduction potential?
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
Zero
When you have central atom with six ions on it
Mag and direction

45. The boiling point of a solution is what type of property? Which means is depends only on what?
Colligative; the number of solute particles present
Isolating an atom from minerals by decomposing the minerals with an electric current
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
Add them together

46. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
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
E = (kq)/r^2
Cathode; anode
The regular one

47. In order to increase the kinetic energy of electrons - they must be what?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
The particle's charge and the magnitude of the electric field
Liquid displaced by that object
Accelerated by a higher voltage between the cathode and anode

48. 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?
Positron emission
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Energy
It has a positive oxidation potential so it is easily oxidized

49. What happens to a negatively charged particle put between two parallel plates?
NO; reduction-oxidation
When all the external forces = zero
They increase because you hear a lower frequency
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

50. Heat from friction comes from what?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
It can absorb light that lets other electrons fill those orbitals
(+)
Decreasing potential energy