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 does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
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
Force times the distance over which the force acts
B = pVg; density
Its momentum is zero because velocity is zero; zero because of conservation of momentum


2. What is the magnetic quantum number?
-l to +l
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
Attractive molecular forces acting between material surfaces in contact
3+


3. Is the work done by air resistance - positive or negative?
One that has more solute particles per liter of solution
Negative
Colligative: it depends on the number of solute molecules in a given volume of water
When all the external forces = zero


4. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
Mv = mv
Colligative; the number of solute particles present
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
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


5. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Energy
The regular one
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)


6. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
It can also equal 'mg'; the compressive strength of a substance
The lowest one
1000
0 Hz because they are traveling side by side at the same speed


7. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
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
Colligative; the number of solute particles present
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)


8. The visible spectrum ranges from ____ to _____
A salt and water
1000
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)


9. What is the equation for a period (T)? What is the equation for angular velocity?
A constant force on a mass causes it to have a constant acceleration
T = 2pi/angular velocity; v/r
The regular one
F =ma and F= qE


10. Beta decay is the emission of what? How do you know what it is the emission of?
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
A positron or electron; when atomic number goes up you know an electron has been emitted
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
It will be reduced the voltage produced by the resistor which means IR; E- IR


11. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Negative
H has a small atomic radius
Helium; 4
+/- 1/2


12. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
Liquid displaced by that object
It can also equal 'mg'; the compressive strength of a substance
They increase because you hear a lower frequency
Positron because this is known as positron decay/electron capture


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

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14. Mechanical waves in a medium fxn to transport what?
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
Energy
Red
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. What is the equation for work done?
W = F(displacement)
It decreases; the work done by the gas in expanding decreases its internal energy
180 degrees; when there is half a wave distance in phase between two waves
A saturated solution in which the aqueous ions are in equilibrium with the solid


16. If temperature arises during a mixture what can you conclude about the enthalpy?
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
The force along the board to the normal force
That it is negative
Faraday/electrons


17. 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?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Mag and direction
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors


18. A pendulum moves under the influence of what?
That it is negative
[A]^a[B]^b
Gravity
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)


19. How many mL is in one liter?
1000
Cathode; anode
It decreases; the work done by the gas in expanding decreases its internal energy
A salt and water


20. What are the units of an electric field?
The buoyant force on it; W = mg = pVg
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
Polar
V/m or N/C


21. Melting occurs at what type of temperature? Why?
The element's mass number
Constant to overcome the heat of fusion (solid to liquid state)
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
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect


22. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Positive
(+)
3+
It decreases; the work done by the gas in expanding decreases its internal energy


23. Terminal voltage is provided to what?
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
(density[p])(volume)
It will be reduced the voltage produced by the resistor which means IR; E- IR
External components of the circuit


24. How do you find specific gravity of an object?
Vertically; perpendicular to all surfaces
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
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
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect


25. When does red litmus paper turn blue?
In the presence of a base
+/- 1/2
At an equal distance behind it as the object is in front of the mirror
NO; reduction-oxidation


26. What is a metathesis rxn?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
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
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
F =ma and F= qE


27. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
It's weight = mg; the work would be the weight times the distance fell
It will increase as well because they are directly related - only if pressure is kept constant
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors


28. When a falling mass is at terminal speed - what is the power expended by the air resistance?
Mg
P = F(v) = mg(v -terminal)
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
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


29. What direction do gravity and bouyancy work? What direction does water pressure work?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
A salt and water
Vertically; perpendicular to all surfaces
The nucleus gains a proton and no neutrons


30. A floating ice cube implies that it's weight is balanced by what?
Energy
T = (2h/g)^1/2; distance = vt
Faraday/electrons
The buoyant force on it; W = mg = pVg


31. Light can be carried along a distance within a transparent material by means of what?
It can absorb light that lets other electrons fill those orbitals
(+)
Total internal reflection
A positron or electron; when atomic number goes up you know an electron has been emitted


32. What kind of metals react violently with water?
F =ma and F= qE
They increase because you hear a lower frequency
Alkali metals = first column
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)


33. What if the circuit elements are in series?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
H has a small atomic radius
The current is the same
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


34. How do you balance redox rxns?

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35. How do you find length of time something is in flight? How do you find distance it traveled?
Electron shell number
Colligative: it depends on the number of solute molecules in a given volume of water
T = (2h/g)^1/2; distance = vt
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


36. How do you find 'g' from Newton's law of gravity?
Half of the exponent
W = F(displacement)
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
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


37. What is the equation for bouyant force? What is p?
Energy
Colligative: it depends on the number of solute molecules in a given volume of water
B = pVg; density
Sp^3


38. For a given flow rate - the speed of fluid flow is inversely proportional to what?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The cross-sectional area through which the fluid flows
Strong acid and strong base/ weak acid and weak base
A constant force on a mass causes it to have a constant acceleration


39. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
It can absorb light that lets other electrons fill those orbitals
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
The particle's charge and the magnitude of the electric field


40. 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?
Attractive molecular forces acting between material surfaces in contact
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Electrons from anode and battery
The buoyant force on it; W = mg = pVg


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

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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. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
Mass number stays the same but the atomic number increases
(+)
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)
From peak to peak


44. 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?
Colligative: it depends on the number of solute molecules in a given volume of water
That of static friction; there is a net accelerating force on the block once it starts to slide
When electron falls from high energy to low energy level
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


45. What is the law of conservation of linear momentum?
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
L = wavelength/2 so L= (wavelength)(2)
Mv = mv
That it is negative


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

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47. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
When you have central atom with six ions on it
A constant force on a mass causes it to have a constant acceleration
Only temperature of the water bath


48. Beta decay is the same as what?
Cathode; anode
Positron emission
It can also equal 'mg'; the compressive strength of a substance
W = F(displacement)


49. Acetic acid is a ______ solvent
It's weight = mg; h
Voltage
It will be reduced the voltage produced by the resistor which means IR; E- IR
Polar


50. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
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
Polar