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 is the formula for the power supplied by a battery to accelerate an electron beam?
Add them together
P = IV
0 Hz because they are traveling side by side at the same speed
They are directly proportional


2. What is newton's second law?
When electron falls from high energy to low energy level
A constant force on a mass causes it to have a constant acceleration
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
They do not differ


3. When something is falling what is the force acting on it? Thus what would be the work done?

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4. What if the circuit elements are in series?
The current is the same
H = negative and S = positive
180 degrees; when there is half a wave distance in phase between two waves
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)


5. Neither N2 or O2 have a permanent what? What does this mean?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
That it is negative
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
A constant force on a mass causes it to have a constant acceleration


6. What kind of metals react violently with water?
Alkali metals = first column
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Faraday/electrons


7. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Mg
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)
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Going from solid to gas phase


8. What is Newton's Universal Law of Gravitation?
Vertically; perpendicular to all surfaces
Cathode; anode
Mag and direction
F = GMm/r^2


9. 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?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
From peak to peak
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Half of the exponent


10. A pendulum moves under the influence of what?
Gravity
Energy
3+
P = F(v) = mg(v -terminal)


11. 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
The reaction between the base and water
A constant force on a mass causes it to have a constant acceleration
One mole of electric charge


12. In a rxn - how do you figure out which atom has the highest electron affinity?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
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
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


13. The visible spectrum ranges from ____ to _____
The density of the water and volume of the lead object
400 to 700 nm
The cross-sectional area through which the fluid flows
The particle's charge and the magnitude of the electric field


14. What is conserved in an inellastic collision?
Zero
The buoyant force on it; W = mg = pVg
From peak to peak
Momentum


15. The probability of an X-ray emission event at a given wavelength is measured by what?
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
In the presence of a base
Its intensity in the spectrum
The mass number stays the number but the atomic number decreases by one - usually resulting in another element


16. What do electrolytic techniques involve?
In the presence of a base
Yes - if the particle's trail is equidistant between two adjacent anodes
Electrons from anode and battery
Isolating an atom from minerals by decomposing the minerals with an electric current


17. The number of incident photons on the cathode affect what?
The number of electrons emitted
That it is negative
Pascal (N*m^2)
A salt and water


18. In general what is formed by an acid-base rxn?
7 always!!!
They must balance
Momentum
A salt and water


19. Nuclear masses can be approximated from what?

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20. Half-sine wave shape is what kind of wavelength with regards to length?
L = wavelength/2 so L= (wavelength)(2)
Strong acid and strong base/ weak acid and weak base
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed


21. If you are given density and volume how do you find mass?
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
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
(density[p])(volume)
External components of the circuit


22. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
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
Cathode; anode
Momentum
It can also equal 'mg'; the compressive strength of a substance


23. In Bohr model of atom when is energy emitted?
When electron falls from high energy to low energy level
Half of the exponent
It decreases; the work done by the gas in expanding decreases its internal energy
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces


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

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25. When does red litmus paper turn blue?
In the presence of a base
3+
L = wavelength/2 so L= (wavelength)(2)
The regular one


26. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
It's weight = mg; h
One that has more solute particles per liter of solution
Faraday/electrons
F =ma and F= qE


27. The total pressure of a solution is what? Give example.
Mg
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 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
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


28. In order to guarantee a non-zero spin how many electrons are needed?
An odd number
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
-l to +l
Decreasing potential energy


29. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
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
Ease of polarizability of the molecule and thus increasing molecular weight of mass


30. Kb is the equilibrium constant for what?
Decreasing potential energy
The reaction between the base and water
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Yes - if the particle's trail is equidistant between two adjacent anodes


31. 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?
You look at what is being oxidized and reduced in the problem
Accelerated by a higher voltage between the cathode and anode
Its momentum is zero because velocity is zero; zero because of conservation of momentum
They do not differ


32. A plane mirror produces an image where?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
1000
It has a positive oxidation potential so it is easily oxidized
At an equal distance behind it as the object is in front of the mirror


33. What happens if an atom undergoes positron decay or electron capture?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Mag and direction
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 lowest one


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

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35. What is Avagadro's number regarding ions/mol?
The number of electrons emitted
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
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
6.02 x 10^23 ions/mol


36. Always remember that velocity has ____ and ____
They must balance
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Mag and direction
Its twice that distance


37. Terminal voltage is provided to what?
Ability to locate an event in space
External components of the circuit
They do not differ
Cathode; anode


38. When you are trying to calculate a galvanic cell's emf - what do you look at?
Negative
You look at what is being oxidized and reduced in the problem
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Cathode; anode


39. What type of acid and base would produce a pH closest to 7?
B = pVg; density
Strong acid and strong base/ weak acid and weak base
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Vertically; perpendicular to all surfaces


40. In order to increase the kinetic energy of electrons - they must be what?
Accelerated by a higher voltage between the cathode and anode
The volume of the ice cube or whatever it is
Negative
The force along the board to the normal force


41. 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?
It can also equal 'mg'; the compressive strength of a substance
(+)
Faraday/electrons
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14


42. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
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
When HIn is turned into In- - which is dependent upon the pKa of the indicator
[S][2S]^2 = 4S^3


43. Can a catalyst shift equilibrium?
No - it increases the speed at which the rxn reaches that equilibrium
Accelerated by a higher voltage between the cathode and 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
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water


44. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
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
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
It can absorb light that lets other electrons fill those orbitals
When all the external forces = zero


45. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
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
One that has more solute particles per liter of solution
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. What is the magnitude of the electric field produced by a point charge?
W = F(displacement)
E = (kq)/r^2
It decreases; the work done by the gas in expanding decreases its internal energy
The volume of the ice cube or whatever it is


47. The force on an electrical charge is what?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
7 always!!!
F =ma and F= qE
+/- 1/2


48. What is weight equal to?
A constant force on a mass causes it to have a constant acceleration
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
Mg
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting


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

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50. In radioactive decay the atomic number (A) and mass number (Z) must what?
Momentum
(density[p])(volume)
-l to +l
They must balance