DSST Physical Sciences2

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 direction do gravity and bouyancy work? What direction does water pressure work?
The density of the water and volume of the lead object
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Vertically; perpendicular to all surfaces
Mv = mv


2. When you are trying to calculate a galvanic cell's emf - what do you look at?
Zero
Mass number stays the same but the atomic number increases
You look at what is being oxidized and reduced in the problem
The mass number stays the number but the atomic number decreases by one - usually resulting in another element


3. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
H = negative and S = positive
Positron emission
The reaction between the base and water


4. 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?
An odd number
(+)
P = F(v) = mg(v -terminal)
400 to 700 nm


5. How do you find 'g' from Newton's law of gravity?
Density (gravitational constant) height
It decreases; the work done by the gas in expanding decreases its internal energy
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles


6. If temperature arises during a mixture what can you conclude about the enthalpy?
When all the external forces = zero
That it is negative
(+)
Electron shell number


7. What is different between an inclined plane and free fall?
Only temperature of the water bath
The path is longer on the inclined plane so it will take object longer to reach the bottom
Isolating an atom from minerals by decomposing the minerals with an electric current
A salt and water


8. 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
The element's mass number
Mass number stays the same but the atomic number increases
Colligative: it depends on the number of solute molecules in a given volume of water


9. Beta decay is the same as what?
The path is longer on the inclined plane so it will take object longer to reach the bottom
Positron because this is known as positron decay/electron capture
Positron emission
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


10. 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?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
-l to +l
Total internal reflection
The reaction between the base and water


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

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12. What do electrolytic techniques involve?
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
Isolating an atom from minerals by decomposing the minerals with an electric current
When all the external forces = zero


13. Melting occurs at what type of temperature? Why?
It will be reduced the voltage produced by the resistor which means IR; E- IR
The reaction between the base and water
Constant to overcome the heat of fusion (solid to liquid state)
When all the external forces = zero


14. 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?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Mg
Add them together
Energy


15. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
They increase because you hear a lower frequency
V/m or N/C
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)


16. Hydrogen has what kind of standard oxidation or reduction potential?
You look at what is being oxidized and reduced in the problem
Zero
E = (kq)/r^2
(+)


17. The boiling point of a solution is what type of property? Which means is depends only on what?
The number of electrons emitted
Colligative; the number of solute particles present
The lowest one
Decreasing potential energy


18. 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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19. In general what is formed by an acid-base rxn?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Energy
A salt and water


20. How should the period of a waveform be calculated?
W = F(displacement)
It's weight = mg; the work would be the weight times the distance fell
They increase because you hear a lower frequency
From peak to peak


21. If both weight and bouyant force are dependent on g - that makes g independent of what?
The volume of the ice cube or whatever it is
L = wavelength/2 so L= (wavelength)(2)
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
The lowest one


22. 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?
H = negative and S = positive
It will be reduced the voltage produced by the resistor which means IR; E- IR
400 to 700 nm
T = 2pi/angular velocity; v/r


23. The number of incident photons on the cathode affect what?
The number of electrons emitted
Zero
A positron or electron; when atomic number goes up you know an electron has been emitted
Light is absorbed and re-emitted by the atomic structure of the optically dense medium


24. What kind of charge is on Al?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
3+
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
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting


25. In PV=nRT - if temp increases what will happen to volume?
Sp^3
Red
It will increase as well because they are directly related - only if pressure is kept constant
Ease of polarizability of the molecule and thus increasing molecular weight of mass


26. 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?
Red
It has a positive oxidation potential so it is easily oxidized
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)


27. The square root of 10^anything is equal to what?
In the presence of a base
Half of the exponent
You look at what is being oxidized and reduced in the problem
How strong a base is


28. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
Zero
[A]^a[B]^b
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Electron shell number


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

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30. A plane mirror produces an image where?
At an equal distance behind it as the object is in front of the mirror
Pascal (N*m^2)
Electrons from anode and battery
Ease of polarizability of the molecule and thus increasing molecular weight of mass


31. 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?
Colligative; the number of solute particles present
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Energy
Its momentum is zero because velocity is zero; zero because of conservation of momentum


32. What is the equation for bouyant force? What is p?
B = pVg; density
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
The buoyant force on it; W = mg = pVg
Where an event took place


33. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
They must balance
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


34. The freezing point of an aqueous solution is what kind of property? What does this mean?
Electron shell number
The path is longer on the inclined plane so it will take object longer to reach the bottom
Colligative: it depends on the number of solute molecules in a given volume of water
Its momentum is zero because velocity is zero; zero because of conservation of momentum


35. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Polar
Sp^3
(density[p])(volume)
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous


36. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
NO; reduction-oxidation
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens


37. Why are bonds between H and another atom shorter compared to most?
Mag and direction
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Vertically; perpendicular to all surfaces
H has a small atomic radius


38. 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?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Faraday/electrons
Constant to overcome the heat of fusion (solid to liquid state)
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus


39. What is weight equal to?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Mg
The density of the water and volume of the lead object
Sp^3


40. 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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41. If you have circuit elements in parallel what is the same across them?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
7 always!!!
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Voltage


42. The temperature of a metal will not increase above its melting point until what?
Red
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Neutrons; atomic number
Mv = mv


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

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44. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
They do not differ
Gravity
Cathode; anode
Mag and direction


45. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
The current is the same
Mass number stays the same but the atomic number increases
It will increase as well because they are directly related - only if pressure is kept constant
Neutrons; atomic number


46. The Ksp for a substance of AaBb is what?
P = F(v) = mg(v -terminal)
[A]^a[B]^b
NO; reduction-oxidation
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


47. In radioactive decay the atomic number (A) and mass number (Z) must what?
Vertically; perpendicular to all surfaces
+/- 1/2
They must balance
External components of the circuit


48. What is the relationship between P and n in PV=nRT?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
T = 2pi/angular velocity; v/r
When electron falls from high energy to low energy level
They are directly proportional


49. 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?
It will be reduced the voltage produced by the resistor which means IR; E- IR
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
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Mass number stays the same but the atomic number increases


50. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
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
6.02 x 10^23 ions/mol
Energy
One that has more solute particles per liter of solution