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. Can a charged particle be detected by two anodes?

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2. Acetic acid is a ______ solvent
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
The regular one
The number of electrons emitted
Polar


3. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
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
Voltage
The buoyant force on it; W = mg = pVg


4. 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?
Add them together
Helium; 4
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Decreasing potential energy


5. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
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
Where an event took place
Add them together
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


6. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
The regular one
It decreases; the work done by the gas in expanding decreases its internal energy
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
0 Hz because they are traveling side by side at the same speed


7. What happens to a negatively charged particle put between two parallel plates?
A positron or electron; when atomic number goes up you know an electron has been emitted
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Yes - if the particle's trail is equidistant between two adjacent anodes


8. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
E = (kq)/r^2
Sp^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
Zero


9. The probability of an X-ray emission event at a given wavelength is measured by what?
W = F(displacement)
Mv = mv
Zero
Its intensity in the spectrum


10. The closer the spacing of the anode wire - the better one can specify what?
They must balance
Where an event took place
It can absorb light that lets other electrons fill those orbitals
Liquid displaced by that object


11. How would you find rate of rxn from pH 1 to pH2?
Constant to overcome the heat of fusion (solid to liquid state)
Sp^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
Ability to locate an event in space


12. What kind of charge is on Al?
3+
It decreases; the work done by the gas in expanding decreases its internal energy
Neutrons; atomic number
Light is absorbed and re-emitted by the atomic structure of the optically dense medium


13. What is the magnetic quantum number?
In the presence of a base
Add them together
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
-l to +l


14. What is sublimation?
Going from solid to gas phase
1000
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
P = F(v) = mg(v -terminal)


15. What is Newton's Universal Law of Gravitation?
F = GMm/r^2
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
Its momentum is zero because velocity is zero; zero because of conservation of momentum
It experiences a constant electric force of qE and will thus accelerate towards the positive plate


16. The volume of an object is equal to water?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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
Liquid displaced by that object
F = GMm/r^2


17. What is the equation for pressure?
That of static friction; there is a net accelerating force on the block once it starts to slide
Density (gravitational constant) height
The force along the board to the normal force
It's weight = mg; h


18. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Colligative: it depends on the number of solute molecules in a given volume of water
The nucleus gains a proton and no neutrons


19. In order to guarantee a non-zero spin how many electrons are needed?
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
An odd number
7 always!!!
Faraday/electrons


20. How do you figure out the literature Ksp value of a compound?
A saturated solution in which the aqueous ions are in equilibrium with the solid
The reaction between the base and water
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Attractive molecular forces acting between material surfaces in contact


21. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
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 particle's charge and the magnitude of the electric field
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c


22. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Electron shell number
[S][2S]^2 = 4S^3
Total internal reflection


23. The concentration of OH and H30 ions are approximately equal at what pH?
A constant force on a mass causes it to have a constant acceleration
7 always!!!
It will be reduced the voltage produced by the resistor which means IR; E- IR
The mass number stays the number but the atomic number decreases by one - usually resulting in another element


24. What is the formula for the power supplied by a battery to accelerate an electron beam?
7 always!!!
P = IV
[S][2S]^2 = 4S^3
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles


25. What is the spin projection quantum number?
A constant force on a mass causes it to have a constant acceleration
Its intensity in the spectrum
+/- 1/2
Its momentum is zero because velocity is zero; zero because of conservation of momentum


26. Why does light travel slower in an optically dense medium than through a vacuum?
T = (2h/g)^1/2; distance = vt
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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
(density[p])(volume)


27. How do you find specific gravity of an object?
The reaction between the base and water
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
It can absorb light that lets other electrons fill those orbitals
[A]^a[B]^b


28. 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?
H = negative and S = positive
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 density of the water and volume of the lead object
H has a small atomic radius


29. In PV=nRT - if temp increases what will happen to volume?
H has a small atomic radius
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
Energy
It will increase as well because they are directly related - only if pressure is kept constant


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

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31. What kind of metals react violently with water?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Electrons from anode and battery
T = (2h/g)^1/2; distance = vt
Alkali metals = first column


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

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34. What color is above 656 nm?
Polar
Red
Mv = mv
It will be reduced the voltage produced by the resistor which means IR; E- IR


35. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
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
Ability to locate an event in space
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


36. Nuclear masses can be approximated from what?

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37. 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?
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
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
400 to 700 nm
The reaction between the base and water


38. What is a metathesis rxn?
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
The force along the board to the normal force
NO; reduction-oxidation
6.02 x 10^23 ions/mol


39. What is the equation for a period (T)? What is the equation for angular velocity?
Energy
T = 2pi/angular velocity; v/r
One that has more solute particles per liter of solution
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water


40. The electrons emitted from cathode are replaced with what?
V/m or N/C
Electrons from anode and battery
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
Mv = mv


41. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
[A]^a[B]^b
Only temperature of the water bath
E = (kq)/r^2
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio


42. The coefficient of kinetic friction is always lower than what? Therefore what?
Density (gravitational constant) height
That of static friction; there is a net accelerating force on the block once it starts to slide
Red
A positron or electron; when atomic number goes up you know an electron has been emitted


43. Hydrogen has what kind of standard oxidation or reduction potential?
Zero
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
3+
The buoyant force on it; W = mg = pVg


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

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45. What is usually conserved over oscillation periods?
Energy
F = GMm/r^2
When all the external forces = zero
One mole of electric charge


46. In Bohr model of atom when is energy emitted?
Its twice that distance
When electron falls from high energy to low energy level
Colligative: it depends on the number of solute molecules in a given volume of water
A saturated solution in which the aqueous ions are in equilibrium with the solid


47. The free energy change (G) must be negative when what?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Sp^3
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
H = negative and S = positive


48. Why are bonds between H and another atom shorter compared to most?
P = F(v) = mg(v -terminal)
When HIn is turned into In- - which is dependent upon the pKa of the indicator
H has a small atomic radius
Yes - if the particle's trail is equidistant between two adjacent anodes


49. In a rxn - how do you figure out which atom has the highest electron affinity?
P = IV
The cross-sectional area through which the fluid flows
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
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


50. Neither N2 or O2 have a permanent what? What does this mean?
E = (kq)/r^2
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
H has a small atomic radius
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces