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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. Half-sine wave shape is what kind of wavelength with regards to length?
L = wavelength/2 so L= (wavelength)(2)
No - it increases the speed at which the rxn reaches that 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
-l to +l

2. What kind of metals react violently with water?
L = wavelength/2 so L= (wavelength)(2)
Alkali metals = first column
It can also equal 'mg'; the compressive strength of a substance
It decreases; the work done by the gas in expanding decreases its internal energy

3. What is Avagadro's number regarding ions/mol?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
6.02 x 10^23 ions/mol
Sp^3
Momentum

4. 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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5. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
Pascal (N*m^2)
Mass number stays the same but the atomic number increases
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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

6. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
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
It decreases; the work done by the gas in expanding decreases its internal energy
The element's mass number

7. Beta decay is the same as what?
Positron emission
Where an event took place
Cathode; anode
The reaction between the base and water

8. In radioactive decay the atomic number (A) and mass number (Z) must what?
Accelerated by a higher voltage between the cathode and anode
They must balance
A salt and water
Half of the exponent

9. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
That they are catalysts in the rxn because they react with the substrate and are reformed
The nucleus gains a proton and no neutrons
Momentum
(+)

10. What are the units of an electric field?
V/m or N/C
Polar
Mv = mv
Colligative; the number of solute particles present

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

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12. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Positron emission
Accelerated by a higher voltage between the cathode and anode
Yes - if the particle's trail is equidistant between two adjacent anodes

13. The range of pH in which a color change takes place in a titration depends on what?
Momentum
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
The lowest whole number ratio of moles of each element in a mole of a cmpd

14. 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?
180 degrees; when there is half a wave distance in phase between two waves
The lowest whole number ratio of moles of each element in a mole of a cmpd
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

15. What is the equation for work done?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
It's weight = mg; h
When HIn is turned into In- - which is dependent upon the pKa of the indicator
W = F(displacement)

16. What is the amt of energy that a frictional force generates?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Force times the distance over which the force acts
It can also equal 'mg'; the compressive strength of a substance
Faraday/electrons

17. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
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 = F(v) = mg(v -terminal)
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. 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?
Strong acid and strong base/ weak acid and weak base
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
The element's mass number

19. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
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
Electrons from anode and battery
An odd number

20. What is the spin projection quantum number?
+/- 1/2
Half of the exponent
The lowest one
They do not differ

21. What is conserved in an inellastic collision?
Faraday/electrons
Positive
It can also equal 'mg'; the compressive strength of a substance
Momentum

22. How should the period of a waveform be calculated?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
They increase because you hear a lower frequency
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
From peak to peak

23. A pendulum moves under the influence of what?
Gravity
They are directly proportional
Strong acid and strong base/ weak acid and weak base
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

24. Light can be carried along a distance within a transparent material by means of what?
H = negative and S = positive
That it is negative
Total internal reflection
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

25. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
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)
It decreases; the work done by the gas in expanding decreases its internal energy
Its intensity in the spectrum
The regular one

26. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
F = GMm/r^2
Positive
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Yes - if the particle's trail is equidistant between two adjacent anodes

27. 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?
Add them together
The path is longer on the inclined plane so it will take object longer to reach the bottom
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
When HIn is turned into In- - which is dependent upon the pKa of the indicator

28. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
Strong acid and strong base/ weak acid and weak base
Add them together
[S][2S]^2 = 4S^3
One mole of electric charge

29. What is a metathesis rxn?
One mole of electric charge
When all the external forces = zero
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
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

30. Melting occurs at what type of temperature? Why?
Constant to overcome the heat of fusion (solid to liquid state)
3+
Polar
H = negative and S = positive

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

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32. Neither N2 or O2 have a permanent what? What does this mean?
Where an event took place
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
You look at what is being oxidized and reduced in the problem
Sp^3

33. The force on an electrical charge is what?
F =ma and F= qE
At an equal distance behind it as the object is in front of the mirror
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

34. How do you find specific gravity of an object?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
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
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
T = 2pi/angular velocity; v/r

35. A saturated solution of KNO3 means what? If you add salt that has any of these two ions what will happen? What is this called?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
400 to 700 nm
It decreases; the work done by the gas in expanding decreases its internal energy
The regular one

36. 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
-l to +l
External components of the circuit

37. How would you find rate of rxn from pH 1 to pH2?
The buoyant force on it; W = mg = pVg
Mg
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
The element's mass number

38. The probability of an X-ray emission event at a given wavelength is measured by what?
Yes - if the particle's trail is equidistant between two adjacent anodes
That of static friction; there is a net accelerating force on the block once it starts to slide
Its intensity in the spectrum
F = GMm/r^2

39. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Polar
-l to +l
Its twice that distance

40. In order to increase the kinetic energy of electrons - they must be what?
At an equal distance behind it as the object is in front of the mirror
Only temperature of the water bath
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
Accelerated by a higher voltage between the cathode and anode

41. What if the circuit elements are in series?
The current is the same
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
A constant force on a mass causes it to have a constant acceleration
Going from solid to gas phase

42. How do you find length of time something is in flight? How do you find distance it traveled?
Electrons from anode and battery
One mole of electric charge
T = (2h/g)^1/2; distance = vt
The volume of the ice cube or whatever it is

43. What happens to a negatively charged particle put between two parallel plates?
L = wavelength/2 so L= (wavelength)(2)
How strong a base is
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Faraday/electrons

44. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
How strong a base is
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
The cross-sectional area through which the fluid flows
Momentum

45. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
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
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Accelerated by a higher voltage between the cathode and anode

46. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
7 always!!!
It's weight = mg; the work would be the weight times the distance fell
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
NO; reduction-oxidation

47. In Bohr model of atom when is energy emitted?
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
Isolating an atom from minerals by decomposing the minerals with an electric current
When electron falls from high energy to low energy level
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

48. 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?
Vertically; perpendicular to all surfaces
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
It's weight = mg; the work would be the weight times the distance fell
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

49. The boiling point of a solution is what type of property? Which means is depends only on what?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
A saturated solution in which the aqueous ions are in equilibrium with the solid
F =ma and F= qE
Colligative; the number of solute particles present

50. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
P = IV
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
They do not differ
Accelerated by a higher voltage between the cathode and anode