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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?
H = negative and S = positive
(density[p])(volume)
They are directly proportional
The nucleus gains a proton and no neutrons

2. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
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
Liquid displaced by that object
Sp^3

3. What does spatial resolution refer to?
Helium; 4
The reaction between the base and water
A positron or electron; when atomic number goes up you know an electron has been emitted
Ability to locate an event in space

4. The visible spectrum ranges from ____ to _____
The element's mass number
Zero
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)
400 to 700 nm

5. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
Yes - if the particle's trail is equidistant between two adjacent anodes
NO; reduction-oxidation
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
(density[p])(volume)

6. Beta decay is the same as what?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Vertically; perpendicular to all surfaces
Half of the exponent
Positron emission

7. How do you find specific gravity of an object?
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
That of static friction; there is a net accelerating force on the block once it starts to slide
When all the external forces = zero
The current is the same

8. What is newton's second law?
Mass number stays the same but the atomic number increases
A constant force on a mass causes it to have a constant acceleration
Mv = mv
The regular one

9. In Bohr model of atom when is energy emitted?
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 can also equal 'mg'; the compressive strength of a substance
When electron falls from high energy to low energy level
One that has more solute particles per liter of solution

10. Heat from friction comes from what?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Decreasing potential energy
The buoyant force on it; W = mg = pVg
Voltage

11. 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?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
6.02 x 10^23 ions/mol
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

12. Why does light travel slower in an optically dense medium than through a vacuum?
Gravity
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
A saturated solution in which the aqueous ions are in equilibrium with the solid
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

13. The probability of an X-ray emission event at a given wavelength is measured by what?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
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
Pascal (N*m^2)
Its intensity in the spectrum

14. Friction is caused by what?
Attractive molecular forces acting between material surfaces in contact
Colligative; the number of solute particles present
The cross-sectional area through which the fluid flows
V/m or N/C

15. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Zero
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
W = F(displacement)
In the presence of a base

16. What kind of geometry is octahedral?
7 always!!!
The nucleus gains a proton and no neutrons
When you have central atom with six ions on it
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

17. Light can be carried along a distance within a transparent material by means of what?
Total internal reflection
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
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

18. What is Newton's Universal Law of Gravitation?
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
Force times the distance over which the force acts
F = GMm/r^2
400 to 700 nm

19. Always remember that velocity has ____ and ____
No - it increases the speed at which the rxn reaches that equilibrium
Mag and direction
Electrons from anode and battery
P = IV

20. The freezing point of an aqueous solution is what kind of property? What does this mean?
Its twice that distance
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Colligative: it depends on the number of solute molecules in a given volume of water
Strong acid and strong base/ weak acid and weak base

21. For a given flow rate - the speed of fluid flow is inversely proportional to what?
The cross-sectional area through which the fluid flows
Gravity
Only temperature of the water bath
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

22. The boiling point of a solution is what type of property? Which means is depends only on what?
W = F(displacement)
The current is the same
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Colligative; the number of solute particles present

23. What are the units of an electric field?
Positron emission
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
V/m or N/C
When all the external forces = zero

24. The square root of 10^anything is equal to what?
Half of the exponent
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
That it is negative
Ability to locate an event in space

25. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
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)
T = 2pi/angular velocity; v/r
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
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

26. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
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)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
One mole of electric charge

27. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Positive
Only temperature of the water bath
It decreases; the work done by the gas in expanding decreases its internal energy
T = (2h/g)^1/2; distance = vt

28. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
The nucleus gains a proton and no neutrons
(density[p])(volume)
When all the external forces = zero
Its momentum is zero because velocity is zero; zero because of conservation of momentum

29. What type of acid and base would produce a pH closest to 7?
Positive
P = F(v) = mg(v -terminal)
Strong acid and strong base/ weak acid and weak base
Colligative; the number of solute particles present

30. 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
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 nucleus gains a proton and no neutrons
T = 2pi/angular velocity; v/r

31. What is the unit for Young's Modulus?
They must balance
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Electrons from anode and battery
Pascal (N*m^2)

32. The total pressure of a solution is what? Give example.
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Positive
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 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

33. The range of pH in which a color change takes place in a titration depends on what?
It's weight = mg; h
You look at what is being oxidized and reduced in the problem
Constant to overcome the heat of fusion (solid to liquid state)
When HIn is turned into In- - which is dependent upon the pKa of the indicator

34. The basicity constant Kb measures what?
How strong a base is
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
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
Ease of polarizability of the molecule and thus increasing molecular weight of mass

35. What is the relationship between P and n in PV=nRT?
Strong acid and strong base/ weak acid and weak base
They are directly proportional
Voltage
Liquid displaced by that object

36. When you are trying to find the buyoancy force of water on a lead object what density do you use in the equation B = pVg? what volume?
That they are catalysts in the rxn because they react with the substrate and are reformed
The density of the water and volume of the lead object
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
They are directly proportional

37. What is one faraday equal to?
Positive
One mole of electric charge
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
When all the external forces = zero

38. Is the work done by air resistance - positive or negative?
Colligative; the number of solute particles present
Negative
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
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

39. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
Half of the exponent
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
T = 2pi/angular velocity; v/r
One that has more solute particles per liter of solution

40. In a rxn - how do you figure out which atom has the highest electron affinity?
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
Neutrons; atomic number
That of static friction; there is a net accelerating force on the block once it starts to slide
The buoyant force on it; W = mg = pVg

41. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
Electron shell number
They are directly proportional
The lowest one
Yes - if the particle's trail is equidistant between two adjacent anodes

42. What if the circuit elements are in series?
Positron emission
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The current is the same
Neutrons; atomic number

43. What is the law of conservation of linear momentum?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Red
Mv = mv
The number of electrons emitted

44. What is a metathesis rxn?
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
3+
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 will be reduced the voltage produced by the resistor which means IR; E- IR

45. What is weight equal to?
NO; reduction-oxidation
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
Mg
H has a small atomic radius

46. The coefficient of kinetic friction is always lower than what? Therefore what?
180 degrees; when there is half a wave distance in phase between two waves
It decreases; the work done by the gas in expanding decreases its internal energy
That of static friction; there is a net accelerating force on the block once it starts to slide
The lowest whole number ratio of moles of each element in a mole of a cmpd

47. 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?
Positron emission
0 Hz because they are traveling side by side at the same speed
The number of electrons emitted
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)

48. What is usually conserved over oscillation periods?
Sp^3
Energy
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
From peak to peak

49. The concentration of OH and H30 ions are approximately equal at what pH?
Faraday/electrons
7 always!!!
They increase because you hear a lower frequency
Colligative: it depends on the number of solute molecules in a given volume of water

50. 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
Colligative; the number of solute particles present
The path is longer on the inclined plane so it will take object longer to reach the bottom
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