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DSST Physical Sciences2

Subjects : dsst, science

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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 is the magnitude of the electric field produced by a point charge?
A constant force on a mass causes it to have a constant acceleration
Negative
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

2. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
H has a small atomic radius
7 always!!!
One that has more solute particles per liter of solution
1000

3. What is the equation for work done?
W = F(displacement)
The nucleus gains a proton and no neutrons
Electron shell number
Positive

4. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
The density of the water and volume of the lead object
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
They are directly proportional

5. The equivalence pt is what part of the titration curve? Thus looking at the range of change between the pH values along this part of the graph can tell you what?

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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?
When you have central atom with six ions on it
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
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
An odd number

7. What is weight equal to?
Liquid displaced by that object
Mg
[S][2S]^2 = 4S^3
Positron because this is known as positron decay/electron capture

8. When a falling mass is at terminal speed - what is the power expended by the air resistance?
One that has more solute particles per liter of solution
Only temperature of the water bath
Mv = mv
P = F(v) = mg(v -terminal)

9. If temperature arises during a mixture what can you conclude about the enthalpy?
-l to +l
That it is negative
The lowest whole number ratio of moles of each element in a mole of a cmpd
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)

10. If you have circuit elements in parallel what is the same across them?
H = negative and S = positive
Voltage
Red
NO; reduction-oxidation

11. 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?
(+)
The particle's charge and the magnitude of the electric field
It's weight = mg; the work would be the weight times the distance fell
Going from solid to gas phase

12. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
Neutrons; atomic number
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Colligative; the number of solute particles present
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

13. When does red litmus paper turn blue?
An odd number
A salt and water
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
In the presence of a base

14. What is one faraday equal to?
One mole of electric charge
Only temperature of the water bath
They must balance
1000

15. Terminal voltage is provided to what?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
When all the external forces = zero
External components of the circuit

16. In general what is formed by an acid-base rxn?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Negative
From peak to peak
A salt and water

17. Heat from friction comes from what?
P = IV
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Decreasing potential energy
Constant to overcome the heat of fusion (solid to liquid state)

18. What is different between an inclined plane and free fall?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
T = 2pi/angular velocity; v/r
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 path is longer on the inclined plane so it will take object longer to reach the bottom

19. What do electrolytic techniques involve?
T = 2pi/angular velocity; v/r
7 always!!!
The number of electrons emitted
Isolating an atom from minerals by decomposing the minerals with an electric current

20. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Add them together
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
NO; reduction-oxidation
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

21. What is Newton's Universal Law of Gravitation?
Accelerated by a higher voltage between the cathode and anode
F = GMm/r^2
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
The volume of the ice cube or whatever it is

22. 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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23. What is the unit for Young's Modulus?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Pascal (N*m^2)
NO; reduction-oxidation
Force times the distance over which the force acts

24. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
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)
V/m or N/C
Helium; 4
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

25. In radioactive decay the atomic number (A) and mass number (Z) must what?
Density (gravitational constant) height
At an equal distance behind it as the object is in front of the mirror
When electron falls from high energy to low energy level
They must balance

26. What is the relationship between P and n in PV=nRT?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
They are directly proportional
Sp^3
An odd number

27. The temperature of a metal will not increase above its melting point until what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
When electron falls from high energy to low energy level
Vertically; perpendicular to all surfaces

28. What is the principal quantum number (n)?
Ability to locate an event in space
Constant to overcome the heat of fusion (solid to liquid state)
Electron shell number
3+

29. Friction is caused by what?
They must balance
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
Attractive molecular forces acting between material surfaces in contact
One that has more solute particles per liter of solution

30. 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
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
Liquid displaced by that object
The regular one

31. Is the work done by air resistance - positive or negative?
Negative
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

32. What kind of charge is on Al?
In the presence of a base
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
3+
[A]^a[B]^b

33. Neither N2 or O2 have a permanent what? What does this mean?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Mag and direction

34. Why are bonds between H and another atom shorter compared to most?
It decreases; the work done by the gas in expanding decreases its internal energy
H has a small atomic radius
Voltage
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

35. Always remember that velocity has ____ and ____
The current is the same
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)
Mag and direction
Density (gravitational constant) height

36. The basicity constant Kb measures what?
Its intensity in the spectrum
400 to 700 nm
It decreases; the work done by the gas in expanding decreases its internal energy
How strong a base is

37. 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?
It can absorb light that lets other electrons fill those orbitals
Attractive molecular forces acting between material surfaces in contact
0 Hz because they are traveling side by side at the same speed
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

38. If you are given a table of substances and are told to find which two show effect of molecular weight on melting point alone - which two substances should you look for?
Its intensity in the spectrum
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Density (gravitational constant) height

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

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40. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
They increase because you hear a lower frequency
Energy
One mole of electric charge
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

41. How do you find specific gravity of an object?
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 mass number stays the number but the atomic number decreases by one - usually resulting in another element
[A]^a[B]^b
Energy

42. The volume of an object is equal to water?
When electron falls from high energy to low energy level
Voltage
Liquid displaced by that object
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

43. A pendulum moves under the influence of what?
P = F(v) = mg(v -terminal)
Colligative: it depends on the number of solute molecules in a given volume of water
Gravity
Decreasing potential energy

44. 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?
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
They must balance
The path is longer on the inclined plane so it will take object longer to reach the bottom
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

45. 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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46. What color is above 656 nm?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The buoyant force on it; W = mg = pVg
Red
The density of the water and volume of the lead object

47. 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
0 Hz because they are traveling side by side at the same speed
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Positron emission

48. In order to guarantee a non-zero spin how many electrons are needed?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
A constant force on a mass causes it to have a constant acceleration
Pascal (N*m^2)
An odd number

49. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
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
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
No - it increases the speed at which the rxn reaches that equilibrium
From peak to peak

50. If both weight and bouyant force are dependent on g - that makes g independent of what?
Positron because this is known as positron decay/electron capture
0 Hz because they are traveling side by side at the same speed
Accelerated by a higher voltage between the cathode and anode
The volume of the ice cube or whatever it is