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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. What is the doppler equation for wavelength and frequency?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
V/m or N/C
Total internal reflection
P = F(v) = mg(v -terminal)

2. Strength of dispersion force increases with what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
NO; reduction-oxidation
The reaction between the base and water
H = negative and S = positive

3. What is the equation for work done?
No - it increases the speed at which the rxn reaches that equilibrium
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
Zero
W = F(displacement)

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

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5. What is the equation for pressure?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Only temperature of the water bath
It will be reduced the voltage produced by the resistor which means IR; E- IR
Density (gravitational constant) height

6. What is the amt of energy that a frictional force generates?
Force times the distance over which the force acts
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Mv = mv
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

7. When does red litmus paper turn blue?
The number of electrons emitted
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
B = pVg; density
In the presence of a base

8. If you have a decrease of pressure to which side of the equation is it equilibrium shifted towards? What about if you increase temperature?

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9. Friction is caused by what?
(+)
Attractive molecular forces acting between material surfaces in contact
At an equal distance behind it as the object is in front of the mirror
Mv = mv

10. What do electrolytic techniques involve?
Isolating an atom from minerals by decomposing the minerals with an electric current
H = negative and S = positive
Where an event took place
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

11. Melting occurs at what type of temperature? Why?
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 path is longer on the inclined plane so it will take object longer to reach the bottom
Going from solid to gas phase
Constant to overcome the heat of fusion (solid to liquid state)

12. When an element decreases its atomic number by one what is emitted?
Positron because this is known as positron decay/electron capture
Only temperature of the water bath
Pascal (N*m^2)
When all the external forces = zero

13. The visible spectrum ranges from ____ to _____
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
F =ma and F= qE
400 to 700 nm
Add them together

14. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
Force times the distance over which the force acts
Accelerated by a higher voltage between the cathode and anode
[S][2S]^2 = 4S^3
The lowest one

15. When you are trying to calculate a galvanic cell's emf - what do you look at?
Zero
You look at what is being oxidized and reduced in the problem
3+
Mg

16. What is Newton's Universal Law of Gravitation?
F = GMm/r^2
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
It has a positive oxidation potential so it is easily oxidized
Voltage

17. What is different between an inclined plane and free fall?
The path is longer on the inclined plane so it will take object longer to reach the bottom
Colligative; the number of solute particles present
Going from solid to gas phase
NO; reduction-oxidation

18. A floating ice cube implies that it's weight is balanced by what?
The buoyant force on it; W = mg = pVg
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Colligative: it depends on the number of solute molecules in a given volume of water
T = 2pi/angular velocity; v/r

19. 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
That it is negative
[A]^a[B]^b
They increase because you hear a lower frequency

20. The temperature of a metal will not increase above its melting point until what?
400 to 700 nm
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
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

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 lowest whole number ratio of moles of each element in a mole of a cmpd
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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

22. Acetic acid is a ______ solvent
That of static friction; there is a net accelerating force on the block once it starts to slide
Add them together
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Polar

23. How many mL is in one liter?
When you have central atom with six ions on it
From peak to peak
1000
Pascal (N*m^2)

24. Kb is the equilibrium constant for what?
It can absorb light that lets other electrons fill those orbitals
Isolating an atom from minerals by decomposing the minerals with an electric current
The reaction between the base and water
A constant force on a mass causes it to have a constant acceleration

25. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
The particle's charge and the magnitude of the electric field
Positive
Helium; 4
They must balance

26. What does spatial resolution refer to?
Ability to locate an event in space
Going from solid to gas phase
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
Mv = mv

27. What is a metathesis rxn?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
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 is a rxn where you mix aqueous solutions of cations and anions and the ionic cmpds switch the ions with which they were paired
E = (kq)/r^2

28. What is newton's second law?
A constant force on a mass causes it to have a constant acceleration
Constant to overcome the heat of fusion (solid to liquid state)
V/m or N/C
They increase because you hear a lower frequency

29. In order to increase the kinetic energy of electrons - they must be what?
Density (gravitational constant) height
Accelerated by a higher voltage between the cathode and anode
Positron because this is known as positron decay/electron capture
The cross-sectional area through which the fluid flows

30. 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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31. Light can be carried along a distance within a transparent material by means of what?
(density[p])(volume)
Its twice that distance
Total internal reflection
A saturated solution in which the aqueous ions are in equilibrium with the solid

32. The electrons emitted from cathode are replaced with what?
Force times the distance over which the force acts
Electrons from anode and battery
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
6.02 x 10^23 ions/mol

33. What is the magnetic quantum number?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
-l to +l
Its twice that distance
Positive

34. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
Positive
The density of the water and volume of the lead object
One that has more solute particles per liter of solution
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

35. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
Gravity
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Liquid displaced by that object
They increase because you hear a lower frequency

36. How should the period of a waveform be calculated?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Mg
From peak to peak
When you have central atom with six ions on it

37. Is the work done by air resistance - positive or negative?
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
Negative
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
[A]^a[B]^b

38. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Add them together
Sp^3
180 degrees; when there is half a wave distance in phase between two waves

39. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
Cathode; anode
The number of electrons emitted
It has a positive oxidation potential so it is easily oxidized
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

40. The basicity constant Kb measures what?
That they are catalysts in the rxn because they react with the substrate and are reformed
Constant to overcome the heat of fusion (solid to liquid state)
How strong a base is
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

41. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
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
They increase because you hear a lower frequency
It decreases; the work done by the gas in expanding decreases its internal energy
Liquid displaced by that object

42. If you are given density and volume how do you find mass?
Negative
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
(density[p])(volume)

43. For a given flow rate - the speed of fluid flow is inversely proportional to what?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The force along the board to the normal force
External components of the circuit
The cross-sectional area through which the fluid flows

44. 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?
6.02 x 10^23 ions/mol
Mag and direction
180 degrees; when there is half a wave distance in phase between two waves
It will be reduced the voltage produced by the resistor which means IR; E- IR

45. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
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
When all the external forces = zero
180 degrees; when there is half a wave distance in phase between two waves

46. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
The current is the same
F =ma and F= qE
Positive

47. What type of acid and base would produce a pH closest to 7?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Mv = mv
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

48. What is the law of conservation of linear momentum?
Mv = mv
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Negative
Density (gravitational constant) height

49. What is the formula for the power supplied by a battery to accelerate an electron beam?
Ability to locate an event in space
P = IV
Its momentum is zero because velocity is zero; zero because of conservation of momentum
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

50. 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?
Zero
The path is longer on the inclined plane so it will take object longer to reach the bottom
0 Hz because they are traveling side by side at the same speed
V/m or N/C