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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. The volume of an object is equal to water?
A positron or electron; when atomic number goes up you know an electron has been emitted
Liquid displaced by that object
The path is longer on the inclined plane so it will take object longer to reach the bottom
When you have central atom with six ions on it

2. How do you find 'g' from Newton's law of gravity?
6.02 x 10^23 ions/mol
Positron emission
V/m or N/C
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

3. The electrons emitted from cathode are replaced with what?
Electrons from anode and battery
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
When all the external forces = zero
The nucleus gains a proton and no neutrons

4. What are the units of an electric field?
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
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)
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
V/m or N/C

5. How do you find moles of a substance when you are given faradays and electrons?
NO; reduction-oxidation
180 degrees; when there is half a wave distance in phase between two waves
Faraday/electrons
6.02 x 10^23 ions/mol

6. What is sublimation?
Alkali metals = first column
7 always!!!
Going from solid to gas phase
The volume of the ice cube or whatever it is

7. Neither N2 or O2 have a permanent what? What does this mean?
T = 2pi/angular velocity; v/r
Helium; 4
They increase because you hear a lower frequency
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

8. How should the period of a waveform be calculated?
Energy
From peak to peak
Ability to locate an event in space
That they are catalysts in the rxn because they react with the substrate and are reformed

9. What if the circuit elements are in series?
3+
7 always!!!
The current is the same
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

10. Acetic acid is a ______ solvent
From peak to peak
The particle's charge and the magnitude of the electric field
They increase because you hear a lower frequency
Polar

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?
It will be reduced the voltage produced by the resistor which means IR; E- IR
Its intensity in the spectrum
Positron emission
+/- 1/2

12. What is newton's second law?
Its intensity in the spectrum
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 constant force on a mass causes it to have a constant acceleration
The force along the board to the normal force

13. Can a charged particle be detected by two anodes?

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14. In Bohr model of atom when is energy emitted?
The force along the board to the normal force
When electron falls from high energy to low energy level
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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

15. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Colligative: it depends on the number of solute molecules in a given volume of water
It decreases; the work done by the gas in expanding decreases its internal energy
One mole of electric charge

16. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
Mass number stays the same but the atomic number increases
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

17. If both weight and bouyant force are dependent on g - that makes g independent of what?
Electrons from anode and battery
You look at what is being oxidized and reduced in the problem
The volume of the ice cube or whatever it is
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

18. How many mL is in one liter?
1000
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Yes - if the particle's trail is equidistant between two adjacent anodes

19. How do you figure out the literature Ksp value of a compound?
A saturated solution in which the aqueous ions are in equilibrium with the solid
The cross-sectional area through which the fluid flows
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

20. What is one faraday equal to?
+/- 1/2
When electron falls from high energy to low energy level
One mole of electric charge
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

21. What is the angular momentum quantum number (l)? It is the same as what? What does an S orbital appear to look like? What would it's (l) be?
3+
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
Ability to locate an event in space
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

22. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
Accelerated by a higher voltage between the cathode and anode
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
H has a small atomic radius
Yes - if the particle's trail is equidistant between two adjacent anodes

23. If the equation says that the E^o has (-) voltage when being reduced - but it is being oxidized in the problem - what does the voltage then become?
H = negative and S = positive
V/m or N/C
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
(+)

24. The square root of 10^anything is equal to what?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Half of the exponent
Yes - if the particle's trail is equidistant between two adjacent anodes
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

25. What is Avagadro's number regarding ions/mol?
Momentum
6.02 x 10^23 ions/mol
Strong acid and strong base/ weak acid and weak base
It decreases; the work done by the gas in expanding decreases its internal energy

26. When an element decreases its atomic number by one what is emitted?
Positron emission
Positron because this is known as positron decay/electron capture
Half of the exponent
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

27. What is the equation for a period (T)? What is the equation for angular velocity?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
T = 2pi/angular velocity; v/r
When electron falls from high energy to low energy level
External components of the circuit

28. What type of acid and base would produce a pH closest to 7?
Cathode; anode
Strong acid and strong base/ weak acid and weak base
One that has more solute particles per liter of solution
Force times the distance over which the force acts

29. What direction do gravity and bouyancy work? What direction does water pressure work?
Mag and direction
Only temperature of the water bath
The particle's charge and the magnitude of the electric field
Vertically; perpendicular to all surfaces

30. What is conserved in an inellastic collision?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
The number of electrons emitted
Momentum
Colligative: it depends on the number of solute molecules in a given volume of water

31. Light can be carried along a distance within a transparent material by means of what?
It can also equal 'mg'; the compressive strength of a substance
Total internal reflection
Red
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

32. How do you balance redox rxns?

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33. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Positron because this is known as positron decay/electron capture
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
The particle's charge and the magnitude of the electric field

34. How do you find wavelength if you known distance from adjacent crests and troughs?
Liquid displaced by that object
Its twice that distance
F =ma and F= qE
At an equal distance behind it as the object is in front of the mirror

35. The coefficient of static friction is the ratio of what?
The force along the board to the normal force
They do not differ
No - it increases the speed at which the rxn reaches that equilibrium
That of static friction; there is a net accelerating force on the block once it starts to slide

36. Always remember that velocity has ____ and ____
From peak to peak
Only temperature of the water bath
Colligative; the number of solute particles present
Mag and direction

37. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
No - it increases the speed at which the rxn reaches that equilibrium
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
From peak to peak
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

38. How would you find rate of rxn from pH 1 to pH2?
That they are catalysts in the rxn because they react with the substrate and are reformed
It can also equal 'mg'; the compressive strength of a substance
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
Isolating an atom from minerals by decomposing the minerals with an electric current

39. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
[A]^a[B]^b
3+
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

40. 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?
Add them together
Polar
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

41. What is the unit for Young's Modulus?
H = negative and S = positive
Its intensity in the spectrum
Pascal (N*m^2)
0 Hz because they are traveling side by side at the same speed

42. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
The cross-sectional area through which the fluid flows
An odd number
6.02 x 10^23 ions/mol

43. Equivalent mass is what?
They must balance
Positron emission
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
Liquid displaced by that object

44. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
P = IV
A salt and water

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

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46. The Ksp for a substance of AaBb is what?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
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
[A]^a[B]^b
Faraday/electrons

47. What is the spin projection quantum number?
It will increase as well because they are directly related - only if pressure is kept constant
Density (gravitational constant) height
+/- 1/2
At an equal distance behind it as the object is in front of the mirror

48. 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?
No - it increases the speed at which the rxn reaches that equilibrium
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
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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

49. What would the force be of a block on a pulley? What would be its displacement?

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50. What is the equation for pressure?
Colligative: it depends on the number of solute molecules in a given volume of water
Density (gravitational constant) height
400 to 700 nm
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)