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DSST Physical Sciences2

Subjects : dsst, science

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. Always remember that velocity has ____ and ____
Mag and direction
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
It will be reduced the voltage produced by the resistor which means IR; E- IR
At an equal distance behind it as the object is in front of the mirror

2. What is usually conserved over oscillation periods?
The density of the water and volume of the lead object
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Energy
F =ma and F= qE

3. 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
F = GMm/r^2
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
External components of the circuit

4. What happens to a negatively charged particle put between two parallel plates?
Vertically; perpendicular to all surfaces
Electrons from anode and battery
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

5. The visible spectrum ranges from ____ to _____
Isolating an atom from minerals by decomposing the minerals with an electric current
Liquid displaced by that object
400 to 700 nm
Mv = mv

6. What is the magnetic quantum number?
-l to +l
T = (2h/g)^1/2; distance = vt
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
It can also equal 'mg'; the compressive strength of a substance

7. What kind of charge is on Al?
3+
H = negative and S = positive
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 blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

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

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9. Why does light travel slower in an optically dense medium than through a vacuum?
Add them together
Red
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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

10. What is sublimation?
Cathode; anode
Voltage
Going from solid to gas phase
No - it increases the speed at which the rxn reaches that equilibrium

11. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
H has a small atomic radius
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
E = (kq)/r^2

12. If both weight and bouyant force are dependent on g - that makes g independent of what?
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
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
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
The volume of the ice cube or whatever it is

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

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14. The basicity constant Kb measures what?
How strong a base is
You look at what is being oxidized and reduced in the problem
It can also equal 'mg'; the compressive strength of a substance
Polar

15. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
A positron or electron; when atomic number goes up you know an electron has been emitted
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
The reaction between the base and water

16. 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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17. What color is above 656 nm?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Red
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

18. Strength of dispersion force increases with what?
1000
The cross-sectional area through which the fluid flows
Cathode; anode
Ease of polarizability of the molecule and thus increasing molecular weight of mass

19. A pendulum moves under the influence of what?
Faraday/electrons
W = F(displacement)
Gravity
The path is longer on the inclined plane so it will take object longer to reach the bottom

20. Can a catalyst shift equilibrium?
No - it increases the speed at which the rxn reaches that equilibrium
Red
In the presence of a base
When all the external forces = zero

21. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
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
They increase because you hear a lower frequency
The nucleus gains a proton and no neutrons
That it is negative

22. Terminal voltage is provided to what?
Momentum
External components of the circuit
P = IV
180 degrees; when there is half a wave distance in phase between two waves

23. If asked which electron configuration of an element is most stable which one do you choose?
The reaction between the base and water
The regular one
400 to 700 nm
Alkali metals = first column

24. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Only temperature of the water bath
When you have central atom with six ions on it
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
-l to +l

25. The phase difference corresponding to a half wave is what? When do you get destructive interference?
1000
Half of the exponent
Energy
180 degrees; when there is half a wave distance in phase between two waves

26. What is different between an inclined plane and free fall?
From peak to peak
The path is longer on the inclined plane so it will take object longer to reach the bottom
That of static friction; there is a net accelerating force on the block once it starts to slide
Total internal reflection

27. What is the equation for work done?
They must balance
In the presence of a base
W = F(displacement)
F =ma and F= qE

28. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
One that has more solute particles per liter of solution
Faraday/electrons
3+
(+)

29. What is the doppler equation for wavelength and frequency?
The cross-sectional area through which the fluid flows
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
It can also equal 'mg'; the compressive strength of a substance
Faraday/electrons

30. 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?
P = F(v) = mg(v -terminal)
It can absorb light that lets other electrons fill those orbitals
Liquid displaced by that object
It has a positive oxidation potential so it is easily oxidized

31. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
It decreases; the work done by the gas in expanding decreases its internal energy
They do not differ
(+)
Liquid displaced by that object

32. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
L = wavelength/2 so L= (wavelength)(2)
Helium; 4
E = (kq)/r^2
Only temperature of the water bath

33. What is one faraday equal to?
One mole of electric charge
1000
You look at what is being oxidized and reduced in the problem
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

34. Equivalent mass is what?
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
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
7 always!!!
F =ma and F= qE

35. How do you find length of time something is in flight? How do you find distance it traveled?
T = (2h/g)^1/2; distance = vt
Cathode; anode
The current is the same
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

36. 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?
F = GMm/r^2
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Faraday/electrons
Going from solid to gas phase

37. The probability of an X-ray emission event at a given wavelength is measured by what?
Positive
Its intensity in the spectrum
At an equal distance behind it as the object is in front of the mirror
Where an event took place

38. In order to increase the kinetic energy of electrons - they must be what?
Accelerated by a higher voltage between the cathode and anode
They must balance
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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

39. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
The buoyant force on it; W = mg = pVg
They increase because you hear a lower frequency
It can also equal 'mg'; the compressive strength of a substance
NO; reduction-oxidation

40. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
Attractive molecular forces acting between material surfaces in contact
T = 2pi/angular velocity; v/r
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

41. Heat from friction comes from what?
Mag and direction
You look at what is being oxidized and reduced in the problem
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
Decreasing potential energy

42. 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?
0 Hz because they are traveling side by side at the same speed
-l to +l
In the presence of a base
The number of electrons emitted

43. When a falling mass is at terminal speed - what is the power expended by the air resistance?
The nucleus gains a proton and no neutrons
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
P = F(v) = mg(v -terminal)
The density of the water and volume of the lead object

44. The free energy change (G) must be negative when what?
The reaction between the base and water
H = negative and S = positive
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
They do not differ

45. 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?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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
3+
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

46. If you are given density and volume how do you find mass?
It decreases; the work done by the gas in expanding decreases its internal energy
[S][2S]^2 = 4S^3
The particle's charge and the magnitude of the electric field
(density[p])(volume)

47. What is the magnitude of the electric field produced by a point charge?
E = (kq)/r^2
It's weight = mg; the work would be the weight times the distance fell
The force along the board to the normal force
The cross-sectional area through which the fluid flows

48. Nuclear masses can be approximated from what?

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49. 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?
180 degrees; when there is half a wave distance in phase between two waves
The density of the water and volume of the lead object
Polar
6.02 x 10^23 ions/mol

50. What is the spin projection quantum number?
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
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
+/- 1/2