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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 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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2. What are the units of an electric field?
Helium; 4
E = (kq)/r^2
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
V/m or N/C

3. In a rxn - how do you figure out which atom has the highest electron affinity?
It can absorb light that lets other electrons fill those orbitals
The nucleus gains a proton and no neutrons
Faraday/electrons
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

4. The number of incident photons on the cathode affect what?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
The lowest one
The number of electrons emitted
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

5. What happens to a negatively charged particle put between two parallel plates?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
The volume of the ice cube or whatever it is
NO; reduction-oxidation
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. In radioactive decay the atomic number (A) and mass number (Z) must what?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
At an equal distance behind it as the object is in front of the mirror
Only temperature of the water bath
They must balance

7. 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?
Half of the exponent
Vertically; perpendicular to all surfaces
H has a small atomic radius
Its momentum is zero because velocity is zero; zero because of conservation of momentum

8. A pendulum moves under the influence of what?
NO; reduction-oxidation
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
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Gravity

9. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Electrons from anode and battery
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
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
The nucleus gains a proton and no neutrons

10. How do you find length of time something is in flight? How do you find distance it traveled?
Helium; 4
Its momentum is zero because velocity is zero; zero because of conservation of momentum
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
T = (2h/g)^1/2; distance = vt

11. How many mL is in one liter?
A positron or electron; when atomic number goes up you know an electron has been emitted
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Its intensity in the spectrum
1000

12. In order to increase the kinetic energy of electrons - they must be what?
External components of the circuit
It decreases; the work done by the gas in expanding decreases its internal energy
Accelerated by a higher voltage between the cathode and anode
180 degrees; when there is half a wave distance in phase between two waves

13. The temperature of a metal will not increase above its melting point until what?
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
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
L = wavelength/2 so L= (wavelength)(2)

14. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
Faraday/electrons
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

15. Melting occurs at what type of temperature? Why?
A salt and water
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
Constant to overcome the heat of fusion (solid to liquid state)
400 to 700 nm

16. The concentration of OH and H30 ions are approximately equal at what pH?
H = negative and S = positive
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Isolating an atom from minerals by decomposing the minerals with an electric current
7 always!!!

17. What is the equation for work done?
E = (kq)/r^2
P = IV
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
W = F(displacement)

18. 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?
Vertically; perpendicular to all surfaces
The particle's charge and the magnitude of the electric field
T = 2pi/angular velocity; v/r
Add them together

19. What happens if an atom undergoes positron decay or electron capture?
Attractive molecular forces acting between material surfaces in contact
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Negative

20. The probability of an X-ray emission event at a given wavelength is measured by what?
How strong a base is
Accelerated by a higher voltage between the cathode and anode
The number of electrons emitted
Its intensity in the spectrum

21. If melting pt of a substance is 80 degrees - then what is the diff in time the substance melts when it is either placed in 100 degree test tube and 90 degree test tube?
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
The force along the board to the normal force
Mass number stays the same but the atomic number increases
When electron falls from high energy to low energy level

22. How do you find wavelength if you known distance from adjacent crests and troughs?
Voltage
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
It's weight = mg; h
Its twice that distance

23. Strength of dispersion force increases with what?
When all the external forces = zero
0 Hz because they are traveling side by side at the same speed
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
Ease of polarizability of the molecule and thus increasing molecular weight of mass

24. The basicity constant Kb measures what?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
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
Electrons from anode and battery
How strong a base is

25. When is a body in translational equilibrium?
When all the external forces = zero
Ability to locate an event in space
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
Liquid displaced by that object

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

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27. In order to guarantee a non-zero spin how many electrons are needed?
An odd number
No - it increases the speed at which the rxn reaches that equilibrium
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)
(+)

28. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
W = F(displacement)
One mole of electric charge
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
They increase because you hear a lower frequency

29. 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?
It has a positive oxidation potential so it is easily oxidized
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 particle's charge and the magnitude of the electric field
They must balance

30. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
E = (kq)/r^2
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
A constant force on a mass causes it to have a constant acceleration
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

31. When a falling mass is at terminal speed - what is the power expended by the air resistance?
Total internal reflection
P = F(v) = mg(v -terminal)
When electron falls from high energy to low energy level
Helium; 4

32. The coefficient of static friction is the ratio of what?
H has a small atomic radius
At an equal distance behind it as the object is in front of the mirror
The force along the board to the normal force
Energy

33. If temperature arises during a mixture what can you conclude about the enthalpy?
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
That it is negative
That of static friction; there is a net accelerating force on the block once it starts to slide
Positron emission

34. Why does light travel slower in an optically dense medium than through a vacuum?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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
E = (kq)/r^2
The particle's charge and the magnitude of the electric field

35. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
Decreasing potential energy
-l to +l
The nucleus gains a proton and no neutrons

36. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
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
Neutrons; atomic number
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
Sp^3

37. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
An odd number
Cathode; anode
A positron or electron; when atomic number goes up you know an electron has been emitted
Mag and direction

38. What is the equation for pressure?
The regular one
Density (gravitational constant) height
180 degrees; when there is half a wave distance in phase between two waves
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. Why are bonds between H and another atom shorter compared to most?
Alkali metals = first column
B = pVg; density
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
H has a small atomic radius

40. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
At an equal distance behind it as the object is in front of the mirror
Add them together
The nucleus gains a proton and no neutrons
Negative

41. If asked which electron configuration of an element is most stable which one do you choose?
Energy
The regular one
Force times the distance over which the force acts
V/m or N/C

42. The force on an electrical charge is what?
F =ma and F= qE
Colligative: it depends on the number of solute molecules in a given volume of water
V/m or N/C
The reaction between the base and water

43. What do electrolytic techniques involve?
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
Isolating an atom from minerals by decomposing the minerals with an electric current
It has a positive oxidation potential so it is easily oxidized
Ease of polarizability of the molecule and thus increasing molecular weight of mass

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

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45. How do you find 'g' from Newton's law of gravity?
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)
You look at what is being oxidized and reduced in the problem
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

46. Hydrogen has what kind of standard oxidation or reduction potential?
Total internal reflection
Colligative; the number of solute particles present
L = wavelength/2 so L= (wavelength)(2)
Zero

47. Friction is caused by what?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
+/- 1/2
Attractive molecular forces acting between material surfaces in contact
When you have central atom with six ions on it

48. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
Electrons from anode and battery
That they are catalysts in the rxn because they react with the substrate and are reformed
180 degrees; when there is half a wave distance in phase between two waves
External components of the circuit

49. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
It's weight = mg; the work would be the weight times the distance fell
H has a small atomic radius
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
They are directly proportional

50. What kind of charge is on Al?
Mv = mv
The force along the board to the normal force
P = IV
3+