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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. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
[S][2S]^2 = 4S^3
T = (2h/g)^1/2; distance = vt
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
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

2. The phase difference corresponding to a half wave is what? When do you get destructive interference?
The particle's charge and the magnitude of the electric field
It's weight = mg; h
Positron because this is known as positron decay/electron capture
180 degrees; when there is half a wave distance in phase between two waves

3. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
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 amt than any of the other cmpds with a higher carbon to oxygen ratio
The path is longer on the inclined plane so it will take object longer to reach the bottom
H = negative and S = positive

4. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
(density[p])(volume)
Helium; 4
The element's mass number
T = (2h/g)^1/2; distance = vt

5. What is newton's second law?
A constant force on a mass causes it to have a constant acceleration
It's weight = mg; h
(+)
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

6. 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
No - it increases the speed at which the rxn reaches that equilibrium
Half of the exponent
H = negative and S = positive

7. What is the doppler equation for wavelength and frequency?
Force times the distance over which the force acts
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
P = F(v) = mg(v -terminal)
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

8. What is conserved in an inellastic collision?
Momentum
When you have central atom with six ions on it
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Constant to overcome the heat of fusion (solid to liquid state)

9. The basicity constant Kb measures what?
How strong a base is
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
[A]^a[B]^b

10. What direction do gravity and bouyancy work? What direction does water pressure work?
In the presence of a base
Cathode; anode
Vertically; perpendicular to all surfaces
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

11. 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
[A]^a[B]^b
400 to 700 nm
One mole of electric charge

12. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
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
Going from solid to gas phase
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

13. What kind of geometry is octahedral?
When you have central atom with six ions on it
B = pVg; density
It's weight = mg; h
Positive

14. The electrons emitted from cathode are replaced with what?
Electrons from anode and battery
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The reaction between the base and water

15. What is the spin projection quantum number?
Momentum
Mag and direction
+/- 1/2
Faraday/electrons

16. In order to guarantee a non-zero spin how many electrons are needed?
They do not differ
It can also equal 'mg'; the compressive strength of a substance
The element's mass number
An odd number

17. What is the equation for pressure?
3+
The regular one
Zero
Density (gravitational constant) height

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?
Energy
Add them together
When you have central atom with six ions on it
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

19. What is Avagadro's number regarding ions/mol?
Cathode; anode
6.02 x 10^23 ions/mol
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Positron emission

20. When a falling mass is at terminal speed - what is the power expended by the air resistance?
P = F(v) = mg(v -terminal)
Positron emission
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Positron because this is known as positron decay/electron capture

21. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
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
Energy
That they are catalysts in the rxn because they react with the substrate and are reformed
T = (2h/g)^1/2; distance = vt

22. The free energy change (G) must be negative when what?
Colligative: it depends on the number of solute molecules in a given volume of water
Liquid displaced by that object
The cross-sectional area through which the fluid flows
H = negative and S = positive

23. What are the units of an electric field?
They are directly proportional
V/m or N/C
How strong a base is
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

24. Is the work done by air resistance - positive or negative?
Constant to overcome the heat of fusion (solid to liquid state)
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Negative
Momentum

25. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
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
They increase because you hear a lower frequency
H has a small atomic radius
Ease of polarizability of the molecule and thus increasing molecular weight of mass

26. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Only temperature of the water bath
Electron shell number
NO; reduction-oxidation
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

27. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
They do not differ
The particle's charge and the magnitude of the electric field
+/- 1/2

28. What is the principal quantum number (n)?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Electrons from anode and battery
0 Hz because they are traveling side by side at the same speed
Electron shell number

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

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30. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
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
-l to +l
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

31. Always remember that velocity has ____ and ____
The lowest one
Helium; 4
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
Mag and direction

32. Isotopes have diff number of ______ but same what?
Neutrons; atomic number
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
That they are catalysts in the rxn because they react with the substrate and are reformed
B = pVg; density

33. What kind of metals react violently with water?
It can also equal 'mg'; the compressive strength of a substance
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Alkali metals = first column
The element's mass number

34. If you are told to find the maximum number of NiCo3 that can form how do you do that?

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35. When does red litmus paper turn blue?
In the presence of a base
W = F(displacement)
Vertically; perpendicular to all surfaces
It has a positive oxidation potential so it is easily oxidized

36. In PV=nRT - if temp increases what will happen to volume?
Mv = mv
-l to +l
It will increase as well because they are directly related - only if pressure is kept constant
6.02 x 10^23 ions/mol

37. Terminal voltage is provided to what?
External components of the circuit
(+)
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
Force times the distance over which the force acts

38. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Helium; 4
Constant to overcome the heat of fusion (solid to liquid state)
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Colligative; the number of solute particles present

39. 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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40. Why are bonds between H and another atom shorter compared to most?
From peak to peak
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
H has a small atomic radius
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

41. 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?
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
Its momentum is zero because velocity is zero; zero because of conservation of momentum
It decreases; the work done by the gas in expanding decreases its internal energy
It has a positive oxidation potential so it is easily oxidized

42. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
Electron shell number
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
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
One that has more solute particles per liter of solution

43. Heat from friction comes from what?
Total internal reflection
E = (kq)/r^2
That it is negative
Decreasing potential energy

44. If temperature arises during a mixture what can you conclude about the enthalpy?
(+)
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
That it is negative
Mg

45. The force on an electrical charge is what?
Density (gravitational constant) height
P = F(v) = mg(v -terminal)
F =ma and F= qE
Neutrons; atomic number

46. What is Newton's Universal Law of Gravitation?
F = GMm/r^2
The current is the same
The buoyant force on it; W = mg = pVg
Alkali metals = first column

47. In order to increase the kinetic energy of electrons - they must be what?
It will increase as well because they are directly related - only if pressure is kept constant
At an equal distance behind it as the object is in front of the mirror
Accelerated by a higher voltage between the cathode and anode
Sp^3

48. The range of pH in which a color change takes place in a titration depends on what?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Attractive molecular forces acting between material surfaces in contact
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

49. The probability of an X-ray emission event at a given wavelength is measured by what?
B = pVg; density
You look at what is being oxidized and reduced in the problem
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
Its intensity in the spectrum

50. What is the law of conservation of linear momentum?
Mv = mv
They do not differ
[S][2S]^2 = 4S^3
The buoyant force on it; W = mg = pVg