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. Heat from friction comes from what?
NO; reduction-oxidation
Decreasing potential energy
Negative
3+


2. If you have circuit elements in parallel what is the same across them?
One that has more solute particles per liter of solution
Isolating an atom from minerals by decomposing the minerals with an electric current
They increase because you hear a lower frequency
Voltage


3. What is usually conserved over oscillation periods?
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
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Energy
The force along the board to the normal force


4. What is the magnetic quantum number?
[S][2S]^2 = 4S^3
Yes - if the particle's trail is equidistant between two adjacent anodes
Its momentum is zero because velocity is zero; zero because of conservation of momentum
-l to +l


5. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Helium; 4
E = (kq)/r^2
No - it increases the speed at which the rxn reaches that equilibrium


6. Why are bonds between H and another atom shorter compared to most?
Cathode; anode
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
H has a small atomic radius
Yes - if the particle's trail is equidistant between two adjacent anodes


7. What direction do gravity and bouyancy work? What direction does water pressure work?
Sp^3
Vertically; perpendicular to all surfaces
It will be reduced the voltage produced by the resistor which means IR; E- IR
1000


8. How do you find 'g' from Newton's law of gravity?
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
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
When all the external forces = zero
Only temperature of the water bath


9. Isotopes have diff number of ______ but same what?
3+
Neutrons; atomic number
Faraday/electrons
It experiences a constant electric force of qE and will thus accelerate towards the positive plate


10. What is the equation for a period (T)? What is the equation for angular velocity?
T = 2pi/angular velocity; v/r
From peak to peak
Neutrons; atomic number
Polar


11. Friction is caused by what?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Attractive molecular forces acting between material surfaces in contact
Ease of polarizability of the molecule and thus increasing molecular weight of mass
They do not differ


12. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
H = negative and S = positive
3+
They do not differ
Half of the exponent


13. 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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14. Can a catalyst shift equilibrium?
The density of the water and volume of the lead object
Ability to locate an event in space
No - it increases the speed at which the rxn reaches that equilibrium
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


15. How many mL is in one liter?
Colligative: it depends on the number of solute molecules in a given volume of water
A salt and water
Half of the exponent
1000


16. What is the doppler equation for wavelength and frequency?
Electron shell number
It can also equal 'mg'; the compressive strength of a substance
It will be reduced the voltage produced by the resistor which means IR; E- IR
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c


17. Strength of dispersion force increases with what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
How strong a base is
Its momentum is zero because velocity is zero; zero because of conservation of momentum


18. What is newton's second law?
Negative
Half of the exponent
Mg
A constant force on a mass causes it to have a constant acceleration


19. What is different between an inclined plane and free fall?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
The path is longer on the inclined plane so it will take object longer to reach the bottom
400 to 700 nm
It can also equal 'mg'; the compressive strength of a substance


20. What is a metathesis rxn?
P = F(v) = mg(v -terminal)
The lowest one
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
Neutrons; atomic number


21. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
A saturated solution in which the aqueous ions are in equilibrium with the solid
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
NO; reduction-oxidation
One that has more solute particles per liter of solution


22. 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?
Mag and direction
A salt and water
No - it increases the speed at which the rxn reaches that equilibrium
(+)


23. Melting occurs at what type of temperature? Why?
When electron falls from high energy to low energy level
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
A positron or electron; when atomic number goes up you know an electron has been emitted
Constant to overcome the heat of fusion (solid to liquid state)


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

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25. 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
The density of the water and volume of the lead object
6.02 x 10^23 ions/mol
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


26. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
F = GMm/r^2
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
A saturated solution in which the aqueous ions are in equilibrium with the solid
The lowest one


27. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Mass number stays the same but the atomic number increases
Vertically; perpendicular to all surfaces
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c


28. The electrons emitted from cathode are replaced with what?
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
Add them together
Electrons from anode and battery
(density[p])(volume)


29. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Positron emission
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
The nucleus gains a proton and no neutrons
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens


30. The coefficient of static friction is the ratio of what?
Helium; 4
The force along the board to the normal force
Where an event took place
Positive


31. How do you find wavelength if you known distance from adjacent crests and troughs?
They increase because you hear a lower frequency
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
Faraday/electrons
Its twice that distance


32. 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?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
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
It has a positive oxidation potential so it is easily oxidized
E = (kq)/r^2


33. The temperature of a metal will not increase above its melting point until 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
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Attractive molecular forces acting between material surfaces in contact
It can absorb light that lets other electrons fill those orbitals


34. What is the equation for pressure?
Helium; 4
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
Density (gravitational constant) height
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces


35. What is Newton's Universal Law of Gravitation?
They must balance
The element's mass number
F = GMm/r^2
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus


36. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
Colligative; the number of solute particles present
One that has more solute particles per liter of solution
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
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


37. In Bohr model of atom when is energy emitted?
When electron falls from high energy to low energy level
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Mass number stays the same but the atomic number increases
When HIn is turned into In- - which is dependent upon the pKa of the indicator


38. The phase difference corresponding to a half wave is what? When do you get destructive interference?
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
180 degrees; when there is half a wave distance in phase between two waves
Cathode; anode
That it is negative


39. In order to guarantee a non-zero spin how many electrons are needed?
Energy
An odd number
V/m or N/C
The lowest one


40. What type of acid and base would produce a pH closest to 7?
The volume of the ice cube or whatever it is
Voltage
Strong acid and strong base/ weak acid and weak base
Total internal reflection


41. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Momentum
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
T = (2h/g)^1/2; distance = vt
Energy


42. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
Add them together
Energy
Polar
The nucleus gains a proton and no neutrons


43. In general what is formed by an acid-base rxn?
A salt and water
Voltage
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
They are directly proportional


44. The probability of an X-ray emission event at a given wavelength is measured by what?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Only temperature of the water bath
Its intensity in the spectrum
At an equal distance behind it as the object is in front of the mirror


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

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46. Nuclear masses can be approximated from what?

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47. If you are given density and volume how do you find mass?
The particle's charge and the magnitude of the electric field
(density[p])(volume)
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
Accelerated by a higher voltage between the cathode and anode


48. Can a charged particle be detected by two anodes?

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49. What is weight equal to?
It will be reduced the voltage produced by the resistor which means IR; E- IR
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Its intensity in the spectrum
Mg


50. The free energy change (G) must be negative when what?
Mag and direction
Gravity
H = negative and S = positive
Negative