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. If you are given density and volume how do you find mass?
(density[p])(volume)
Faraday/electrons
The volume of the ice cube or whatever it is
P = IV


2. What is the equation for work done?
Its twice that distance
[A]^a[B]^b
Only temperature of the water bath
W = F(displacement)


3. The closer the spacing of the anode wire - the better one can specify what?
They increase because you hear a lower frequency
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 lowest one
Where an event took place


4. 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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5. When is a body in translational equilibrium?
It will increase as well because they are directly related - only if pressure is kept constant
When all the external forces = zero
They must balance
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R


6. 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?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
They must balance
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
Cathode; anode


7. What is sublimation?
Mag and direction
Faraday/electrons
Going from solid to gas phase
H = negative and S = positive


8. Friction is caused by what?
Liquid displaced by that object
Its twice that distance
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Attractive molecular forces acting between material surfaces in contact


9. What is Newton's Universal Law of Gravitation?
Its intensity in the spectrum
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
F = GMm/r^2
Colligative; the number of solute particles present


10. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
When all the external forces = zero
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
3+
Helium; 4


11. The volume of an object is equal to water?
No - it increases the speed at which the rxn reaches that equilibrium
Liquid displaced by that object
It can absorb light that lets other electrons fill those orbitals
Going from solid to gas phase


12. A nearsighted person has what type of focal length? Thus what do we do to correct this?
They are directly proportional
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
External components of the circuit
They must balance


13. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
Mg
E = (kq)/r^2
That of static friction; there is a net accelerating force on the block once it starts to slide
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


14. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
NO; reduction-oxidation
400 to 700 nm
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
P = IV


15. The phase difference corresponding to a half wave is what? When do you get destructive interference?
180 degrees; when there is half a wave distance in phase between two waves
Mv = mv
That it is negative
It will increase as well because they are directly related - only if pressure is kept constant


16. When you are trying to calculate a galvanic cell's emf - what do you look at?
You look at what is being oxidized and reduced in the problem
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
3+
Electrons from anode and battery


17. Half-sine wave shape is what kind of wavelength with regards to length?
L = wavelength/2 so L= (wavelength)(2)
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Mg
Total internal reflection


18. Isotopes have diff number of ______ but same what?
External components of the circuit
Helium; 4
The buoyant force on it; W = mg = pVg
Neutrons; atomic number


19. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
They must balance
E = (kq)/r^2
Cathode; anode
V/m or N/C


20. How would you find rate of rxn from pH 1 to pH2?
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
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Faraday/electrons
6.02 x 10^23 ions/mol


21. The free energy change (G) must be negative when what?
H = negative and S = positive
Positron because this is known as positron decay/electron capture
How strong a base is
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


22. When you are trying to find the buyoancy force of water on a lead object what density do you use in the equation B = pVg? what volume?
The density of the water and volume of the lead object
Colligative; the number of solute particles present
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 element's mass number


23. Mechanical waves in a medium fxn to transport what?
The force along the board to the normal force
Energy
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
When HIn is turned into In- - which is dependent upon the pKa of the indicator


24. In order to guarantee a non-zero spin how many electrons are needed?
F =ma and F= qE
An odd number
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
Strong acid and strong base/ weak acid and weak base


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

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26. Nuclear masses can be approximated from what?

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27. Kb is the equilibrium constant for what?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
The reaction between the base and water


28. What type of acid and base would produce a pH closest to 7?
Red
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
When electron falls from high energy to low energy level
Strong acid and strong base/ weak acid and weak base


29. What is the amt of energy that a frictional force generates?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
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
Force times the distance over which the force acts
Decreasing potential energy


30. Terminal voltage is provided to what?
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
External components of the circuit
They increase because you hear a lower frequency
At an equal distance behind it as the object is in front of the mirror


31. If you have circuit elements in parallel what is the same across them?
No - it increases the speed at which the rxn reaches that equilibrium
Vertically; perpendicular to all surfaces
Voltage
That they are catalysts in the rxn because they react with the substrate and are reformed


32. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
It's weight = mg; h
H = negative and S = positive
Mv = mv
Mass number stays the same but the atomic number increases


33. Always remember that velocity has ____ and ____
No - it increases the speed at which the rxn reaches that equilibrium
Mag and direction
B = pVg; density
7 always!!!


34. Beta decay is the emission of what? How do you know what it is the emission of?
A positron or electron; when atomic number goes up you know an electron has been emitted
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
When you have central atom with six ions on it
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


35. The visible spectrum ranges from ____ to _____
400 to 700 nm
The buoyant force on it; W = mg = pVg
The density of the water and volume of the lead object
Mass number stays the same but the atomic number increases


36. How do you find wavelength if you known distance from adjacent crests and troughs?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Its twice that distance
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Going from solid to gas phase


37. What is a metathesis rxn?
Energy
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
Electron shell number
Accelerated by a higher voltage between the cathode and anode


38. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
Energy
The cross-sectional area through which the fluid flows
180 degrees; when there is half a wave distance in phase between two waves


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

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40. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
Red
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 density of the water and volume of the lead object
The force along the board to the normal force


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

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42. 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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43. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
No - it increases the speed at which the rxn reaches that equilibrium
Total internal reflection
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


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

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45. 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?
F = GMm/r^2
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
T = 2pi/angular velocity; v/r
Mg


46. What is the spin projection quantum number?
V/m or N/C
When you have central atom with six ions on it
+/- 1/2
Positron emission


47. The total pressure of a solution is what? Give example.
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
The lowest one
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
7 always!!!


48. If both weight and bouyant force are dependent on g - that makes g independent of what?
Total internal reflection
The volume of the ice cube or whatever it is
At an equal distance behind it as the object is in front of the mirror
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


49. For a given flow rate - the speed of fluid flow is inversely proportional to what?
The cross-sectional area through which the fluid flows
In the presence of a base
The nucleus gains a proton and no neutrons
The particle's charge and the magnitude of the electric field


50. The coefficient of static friction is the ratio of what?
E = (kq)/r^2
The force along the board to the normal force
How strong a base is
Electrons from anode and battery