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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 a falling mass is at terminal speed - what is the power expended by the air resistance?
0 Hz because they are traveling side by side at the same speed
P = F(v) = mg(v -terminal)
400 to 700 nm
The volume of the ice cube or whatever it is

2. What is the spin projection quantum number?
Cathode; anode
+/- 1/2
Only temperature of the water bath
Mag and direction

3. Nuclear masses can be approximated from what?

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4. Light can be carried along a distance within a transparent material by means of what?
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
Zero
Total internal reflection
Alkali metals = first column

5. How do you find wavelength if you known distance from adjacent crests and troughs?
Its twice that distance
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
H has a small atomic radius
Red

6. 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
Attractive molecular forces acting between material surfaces in contact
External components of the circuit
Electrons from anode and battery

7. Always remember that velocity has ____ and ____
Half of the exponent
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Mag and direction
3+

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

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9. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
It can also equal 'mg'; the compressive strength of a substance
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 particle's charge and the magnitude of the electric field
The regular one

10. The free energy change (G) must be negative when what?
When electron falls from high energy to low energy level
Polar
H = negative and S = positive
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

11. 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?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
It will be reduced the voltage produced by the resistor which means IR; E- IR
The lowest one
The number of electrons emitted

12. 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?
0 Hz because they are traveling side by side at the same speed
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
It decreases; the work done by the gas in expanding decreases its internal energy
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

13. In general what is formed by an acid-base rxn?
A salt and water
[S][2S]^2 = 4S^3
That it is negative
V/m or N/C

14. If you have an alcohol with OH on the end and then another cmpd with an O in the middle but no H - what is different between the bonds they can make with water?

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15. 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?
Faraday/electrons
External components of the circuit
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
At an equal distance behind it as the object is in front of the mirror

16. Half-sine wave shape is what kind of wavelength with regards to length?
Only temperature of the water bath
L = wavelength/2 so L= (wavelength)(2)
It can absorb light that lets other electrons fill those orbitals
Electrons from anode and battery

17. The electrons emitted from cathode are replaced with what?
Constant to overcome the heat of fusion (solid to liquid state)
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
Electrons from anode and battery
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

18. What is the equation for a period (T)? What is the equation for angular velocity?
V/m or N/C
T = 2pi/angular velocity; v/r
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
(density[p])(volume)

19. For a given flow rate - the speed of fluid flow is inversely proportional to what?
The density of the water and volume of the lead object
The cross-sectional area through which the fluid flows
Where an event took place
Attractive molecular forces acting between material surfaces in contact

20. What do electrolytic techniques involve?
Only temperature of the water bath
Alkali metals = first column
Isolating an atom from minerals by decomposing the minerals with an electric current
When HIn is turned into In- - which is dependent upon the pKa of the indicator

21. What is the equation for bouyant force? What is p?
When you have central atom with six ions on it
B = pVg; density
T = (2h/g)^1/2; distance = vt
The element's mass number

22. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
Negative
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
It can absorb light that lets other electrons fill those orbitals
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

23. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
One that has more solute particles per liter of solution
Constant to overcome the heat of fusion (solid to liquid state)
Ease of polarizability of the molecule and thus increasing molecular weight of mass

24. The temperature of a metal will not increase above its melting point until what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
A constant force on a mass causes it to have a constant acceleration
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
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

25. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
(+)
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
They do not differ
The number of electrons emitted

26. Friction is caused by what?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Accelerated by a higher voltage between the cathode and anode
Attractive molecular forces acting between material surfaces in contact
+/- 1/2

27. The equivalence pt is what part of the titration curve? Thus looking at the range of change between the pH values along this part of the graph can tell you what?

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28. Strength of dispersion force increases with what?
The element's mass number
Constant to overcome the heat of fusion (solid to liquid state)
B = pVg; density
Ease of polarizability of the molecule and thus increasing molecular weight of mass

29. The freezing point of an aqueous solution is what kind of property? What does this mean?
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 also equal 'mg'; the compressive strength of a substance
Colligative: it depends on the number of solute molecules in a given volume of water
The cross-sectional area through which the fluid flows

30. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The element's mass number
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Force times the distance over which the force acts
E = (kq)/r^2

31. What happens if an atom undergoes positron decay or electron capture?
Electrons from anode and battery
-l to +l
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Liquid displaced by that object

32. Terminal voltage is provided to what?
External components of the circuit
It's weight = mg; the work would be the weight times the distance fell
They increase because you hear a lower frequency
H = negative and S = positive

33. What is the relationship between P and n in PV=nRT?
They are directly proportional
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
0 Hz because they are traveling side by side at the same speed
[S][2S]^2 = 4S^3

34. The force on an electrical charge is 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
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
F =ma and F= qE
In the presence of a base

35. How do you figure out the literature Ksp value of a compound?
A saturated solution in which the aqueous ions are in equilibrium with the solid
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Force times the distance over which the force acts
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

36. In a healthy person standing at rest - a comparison of arterial blood pressure measured in the arm with that in the leg - shows what about the differences between these pressures?
A constant force on a mass causes it to have a constant acceleration
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
That it is negative

37. How many mL is in one liter?
It's weight = mg; h
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
1000
That they are catalysts in the rxn because they react with the substrate and are reformed

38. What is the equation for pressure?
Density (gravitational constant) height
Colligative; the number of solute particles present
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
Electron shell number

39. A plane mirror produces an image where?
Only temperature of the water bath
(density[p])(volume)
P = F(v) = mg(v -terminal)
At an equal distance behind it as the object is in front of the mirror

40. What if the circuit elements are in series?
Polar
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
The current is the same
Its twice that distance

41. The closer the spacing of the anode wire - the better one can specify what?
You look at what is being oxidized and reduced in the problem
It will increase as well because they are directly related - only if pressure is kept constant
Where an event took place
H has a small atomic radius

42. When an element decreases its atomic number by one what is emitted?
Attractive molecular forces acting between material surfaces in contact
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 Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Positron because this is known as positron decay/electron capture

43. In order to increase the kinetic energy of electrons - they must be what?
Accelerated by a higher voltage between the cathode and anode
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
When all the external forces = zero

44. Neither N2 or O2 have a permanent what? What does this mean?
Pascal (N*m^2)
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

45. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Force times the distance over which the force acts
L = wavelength/2 so L= (wavelength)(2)

46. What is Newton's Universal Law of Gravitation?
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 cross-sectional area through which the fluid flows
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
F = GMm/r^2

47. The Ksp for a substance of AaBb is what?
The reaction between the base and water
3+
[A]^a[B]^b
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

48. When is a body in translational equilibrium?
Colligative; the number of solute particles present
When all the external forces = zero
It can absorb light that lets other electrons fill those orbitals
External components of the circuit

49. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
The nucleus gains a proton and no neutrons
Mass number stays the same but the atomic number increases
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
V/m or N/C

50. In order to guarantee a non-zero spin how many electrons are needed?
Decreasing potential energy
The element's mass number
An odd number
Constant to overcome the heat of fusion (solid to liquid state)