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 are the three separate module for tensile stress - shear stress - and compression/expansion?

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2. 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?
When you have central atom with six ions on it
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 volume of the ice cube or whatever it is
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed


3. The freezing point of an aqueous solution is what kind of property? What does this mean?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Positive
The lowest whole number ratio of moles of each element in a mole of a cmpd
Colligative: it depends on the number of solute molecules in a given volume of water


4. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
Strong acid and strong base/ weak acid and weak base
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
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 can also equal 'mg'; the compressive strength of a substance


5. 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?
Liquid displaced by that object
(+)
A saturated solution in which the aqueous ions are in equilibrium with the solid
E = (kq)/r^2


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

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7. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
T = 2pi/angular velocity; v/r
The nucleus gains a proton and no neutrons


8. What is one faraday equal to?
No - it increases the speed at which the rxn reaches that equilibrium
Helium; 4
One mole of electric charge
The buoyant force on it; W = mg = pVg


9. 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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10. What is the equation for a period (T)? What is the equation for angular velocity?
T = 2pi/angular velocity; v/r
How strong a base is
The lowest whole number ratio of moles of each element in a mole of a cmpd
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


11. Why are bonds between H and another atom shorter compared to most?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
H has a small atomic radius
Faraday/electrons
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c


12. Friction is caused by what?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The current is the same
Attractive molecular forces acting between material surfaces in contact
Ease of polarizability of the molecule and thus increasing molecular weight of mass


13. What is different between an inclined plane and free fall?
Energy
The density of the water and volume of the lead object
The buoyant force on it; W = mg = pVg
The path is longer on the inclined plane so it will take object longer to reach the bottom


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

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15. 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?
The current is the same
Red
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Momentum


16. What if the circuit elements are in series?
Colligative: it depends on the number of solute molecules in a given volume of water
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
A constant force on a mass causes it to have a constant acceleration
The current is the same


17. What do electrolytic techniques involve?
Isolating an atom from minerals by decomposing the minerals with an electric current
L = wavelength/2 so L= (wavelength)(2)
H = negative and S = positive
One that has more solute particles per liter of solution


18. In order to guarantee a non-zero spin how many electrons are needed?
Add them together
Electrons from anode and battery
An odd number
T = 2pi/angular velocity; v/r


19. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
3+
One that has more solute particles per liter of solution
E = (kq)/r^2
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


20. 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
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Alkali metals = first column
In the presence of a base


21. What is the amt of energy that a frictional force generates?
Faraday/electrons
W = F(displacement)
The element's mass number
Force times the distance over which the force acts


22. The probability of an X-ray emission event at a given wavelength is measured by what?
Its intensity in the spectrum
Neutrons; atomic number
Zero
Yes - if the particle's trail is equidistant between two adjacent anodes


23. A floating ice cube implies that it's weight is balanced by what?
The buoyant force on it; W = mg = pVg
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 element's mass number
E = (kq)/r^2


24. A pendulum moves under the influence of what?
Helium; 4
Energy
Gravity
That it is negative


25. The concentration of OH and H30 ions are approximately equal at what pH?
Constant to overcome the heat of fusion (solid to liquid state)
Negative
It can absorb light that lets other electrons fill those orbitals
7 always!!!


26. What is the law of conservation of linear momentum?
Mv = mv
The lowest one
Ease of polarizability of the molecule and thus increasing molecular weight of mass
It's weight = mg; h


27. The electrons emitted from cathode are replaced with what?
Electrons from anode and battery
You look at what is being oxidized and reduced in the problem
Half of the exponent
The reaction between the base and water


28. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
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
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
Positive
Isolating an atom from minerals by decomposing the minerals with an electric current


29. The closer the spacing of the anode wire - the better one can specify what?
The nucleus gains a proton and no neutrons
400 to 700 nm
Where an event took place
Its momentum is zero because velocity is zero; zero because of conservation of momentum


30. What is weight equal to?
Mg
Isolating an atom from minerals by decomposing the minerals with an electric current
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Negative


31. The temperature of a metal will not increase above its melting point until what?
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
It decreases; the work done by the gas in expanding decreases its internal energy
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors


32. 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?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
The density of the water and volume of the lead object
6.02 x 10^23 ions/mol
The reaction between the base and water


33. Nuclear masses can be approximated from what?

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34. Always remember that velocity has ____ and ____
The lowest one
Mag and direction
Mg
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


35. What is sublimation?
Going from solid to gas phase
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
[S][2S]^2 = 4S^3
Zero


36. What is the spin projection quantum number?
+/- 1/2
7 always!!!
Faraday/electrons
Attractive molecular forces acting between material surfaces in contact


37. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
(density[p])(volume)
When all the external forces = zero
-l to +l


38. What is the relationship between P and n in PV=nRT?
The cross-sectional area through which the fluid flows
They are directly proportional
+/- 1/2
T = (2h/g)^1/2; distance = vt


39. The boiling point of a solution is what type of property? Which means is depends only on what?
Colligative; the number of solute particles present
+/- 1/2
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
V/m or N/C


40. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
It's weight = mg; h
Ability to locate an event in space
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio


41. 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?
One that has more solute particles per liter of solution
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)


42. 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?
That of static friction; there is a net accelerating force on the block once it starts to slide
0 Hz because they are traveling side by side at the same speed
+/- 1/2
It will increase as well because they are directly related - only if pressure is kept constant


43. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Attractive molecular forces acting between material surfaces in contact
P = F(v) = mg(v -terminal)
Density (gravitational constant) height


44. What happens if an atom undergoes positron decay or electron capture?
(+)
3+
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 mass number stays the number but the atomic number decreases by one - usually resulting in another element


45. 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
Sp^3
Density (gravitational constant) height
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


46. When a falling mass is at terminal speed - what is the power expended by the air resistance?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
It can also equal 'mg'; the compressive strength of a substance
Mass number stays the same but the atomic number increases
P = F(v) = mg(v -terminal)


47. Heat from friction comes from what?
(density[p])(volume)
V/m or N/C
1000
Decreasing potential energy


48. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
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)
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
The mass number stays the number but the atomic number decreases by one - usually resulting in another element


49. If temperature arises during a mixture what can you conclude about the enthalpy?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Strong acid and strong base/ weak acid and weak base
+/- 1/2
That it is negative


50. 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?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
The density of the water and volume of the lead object
It has a positive oxidation potential so it is easily oxidized
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio