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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. In general what is formed by an acid-base rxn?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
A salt and water
Decreasing potential energy
-l to +l

2. Friction is caused by what?
180 degrees; when there is half a wave distance in phase between two waves
Electrons from anode and battery
Negative
Attractive molecular forces acting between material surfaces in contact

3. What is weight equal to?
+/- 1/2
Colligative; the number of solute particles present
Half of the exponent
Mg

4. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
That they are catalysts in the rxn because they react with the substrate and are reformed
When all the external forces = zero
Positive

5. What is Avagadro's number regarding ions/mol?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
It can absorb light that lets other electrons fill those orbitals
6.02 x 10^23 ions/mol
[A]^a[B]^b

6. The number of incident photons on the cathode affect what?
Its intensity in the spectrum
Electrons from anode and battery
The number of electrons emitted
That they are catalysts in the rxn because they react with the substrate and are reformed

7. What is the unit for Young's Modulus?
Yes - if the particle's trail is equidistant between two adjacent anodes
3+
Pascal (N*m^2)
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

8. 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?
Positive
From peak to peak
H = negative and S = positive
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

9. If you have circuit elements in parallel what is the same across them?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Strong acid and strong base/ weak acid and weak base
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Voltage

10. The coefficient of kinetic friction is always lower than what? Therefore what?
Electrons from anode and battery
That of static friction; there is a net accelerating force on the block once it starts to slide
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Its intensity in the spectrum

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?
Its intensity in the spectrum
Yes - if the particle's trail is equidistant between two adjacent anodes
W = F(displacement)
It will be reduced the voltage produced by the resistor which means IR; E- IR

12. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
Where an event took place
The nucleus gains a proton and no neutrons
Force times the distance over which the force acts
Strong acid and strong base/ weak acid and weak base

13. The force on an electrical charge is what?
Voltage
They must balance
[A]^a[B]^b
F =ma and F= qE

14. The total pressure of a solution is what? Give example.
6.02 x 10^23 ions/mol
T = 2pi/angular velocity; v/r
Strong acid and strong base/ weak acid and weak base
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

15. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
Density (gravitational constant) height
Add them together
One that has more solute particles per liter of solution
Energy

16. What do electrolytic techniques involve?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
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
Isolating an atom from minerals by decomposing the minerals with an electric current
[S][2S]^2 = 4S^3

17. How do you find moles of a substance when you are given faradays and electrons?
Its intensity in the spectrum
One mole of electric charge
Faraday/electrons
It decreases; the work done by the gas in expanding decreases its internal energy

18. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Positive
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
External components of the circuit
When electron falls from high energy to low energy level

19. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
It will increase as well because they are directly related - only if pressure is kept constant
They do not differ
When electron falls from high energy to low energy level

20. What is the equation for a period (T)? What is the equation for angular velocity?
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
T = 2pi/angular velocity; v/r
The nucleus gains a proton and no neutrons
That of static friction; there is a net accelerating force on the block once it starts to slide

21. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
P = F(v) = mg(v -terminal)
The element's mass number
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

22. Nuclear masses can be approximated from what?

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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?
The force along the board to the normal force
The volume of the ice cube or whatever it is
Mag and direction
0 Hz because they are traveling side by side at the same speed

24. How do you balance redox rxns?

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25. Mechanical waves in a medium fxn to transport what?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Energy
Cathode; anode
+/- 1/2

26. A floating ice cube implies that it's weight is balanced by what?
That of static friction; there is a net accelerating force on the block once it starts to slide
180 degrees; when there is half a wave distance in phase between two waves
Neutrons; atomic number
The buoyant force on it; W = mg = pVg

27. 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?
Polar
The current is the same
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Total internal reflection

28. The basicity constant Kb measures what?
The reaction between the base and water
How strong a base is
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
P = IV

29. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
The regular one
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
-l to +l
E = (kq)/r^2

30. What is the magnitude of the electric field produced by a point charge?
Add them together
E = (kq)/r^2
H has a small atomic radius
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

31. What is Newton's Universal Law of Gravitation?
F = GMm/r^2
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
At an equal distance behind it as the object is in front of the mirror
Sp^3

32. In Bohr model of atom when is energy emitted?
Vertically; perpendicular to all surfaces
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
When electron falls from high energy to low energy level
Polar

33. If asked which electron configuration of an element is most stable which one do you choose?
Helium; 4
-l to +l
The regular one
Momentum

34. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
Colligative: it depends on the number of solute molecules in a given volume of water
P = IV
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 lowest one

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

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36. What does spatial resolution refer to?
Ability to locate an event in space
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Vertically; perpendicular to all surfaces
The path is longer on the inclined plane so it will take object longer to reach the bottom

37. If you are given density and volume how do you find mass?
(density[p])(volume)
Zero
Its intensity in the spectrum
It has a positive oxidation potential so it is easily oxidized

38. The concentration of OH and H30 ions are approximately equal at what pH?
One that has more solute particles per liter of solution
7 always!!!
The path is longer on the inclined plane so it will take object longer to reach the bottom
(+)

39. The range of pH in which a color change takes place in a titration depends on what?
Energy
Alkali metals = first column
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
When HIn is turned into In- - which is dependent upon the pKa of the indicator

40. Light can be carried along a distance within a transparent material by means of what?
Only temperature of the water bath
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
You look at what is being oxidized and reduced in the problem
Total internal reflection

41. What is the formula for the power supplied by a battery to accelerate an electron beam?
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
P = IV
They do not differ
3+

42. 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
Force times the distance over which the force acts
Its momentum is zero because velocity is zero; zero because of conservation of momentum
When all the external forces = zero

43. The free energy change (G) must be negative when what?
H = negative and S = positive
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
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

44. 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?
Add them together
A constant force on a mass causes it to have a constant acceleration
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
How strong a base is

45. What is the equation for pressure?
Density (gravitational constant) height
Liquid displaced by that object
Momentum
The number of electrons emitted

46. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
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
Sp^3
B = pVg; density
Liquid displaced by that object

47. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
NO; reduction-oxidation
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Force times the distance over which the force acts
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

48. What is the amt of energy that a frictional force generates?
The nucleus gains a proton and no neutrons
Strong acid and strong base/ weak acid and weak base
Liquid displaced by that object
Force times the distance over which the force acts

49. What is the magnetic quantum number?
They increase because you hear a lower frequency
In the presence of a base
-l to +l
How strong a base is

50. What is the equation for work done?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Electron shell number
W = F(displacement)
The number of electrons emitted