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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. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
7 always!!!
T = 2pi/angular velocity; v/r
It decreases; the work done by the gas in expanding decreases its internal energy
Colligative: it depends on the number of solute molecules in a given volume of water

2. What does spatial resolution refer to?
Ability to locate an event in space
Zero
-l to +l
That of static friction; there is a net accelerating force on the block once it starts to slide

3. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
E = (kq)/r^2
They do not differ
Yes - if the particle's trail is equidistant between two adjacent anodes
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

4. Heat from friction comes from what?
Its intensity in the spectrum
Decreasing potential energy
The force along the board to the normal force
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

5. What is the magnitude of the electric field produced by a point charge?
The volume of the ice cube or whatever it is
An odd number
Going from solid to gas phase
E = (kq)/r^2

6. A floating ice cube implies that it's weight is balanced by what?
The buoyant force on it; W = mg = pVg
B = pVg; density
Constant to overcome the heat of fusion (solid to liquid state)
0 Hz because they are traveling side by side at the same speed

7. 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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8. What is Avagadro's number regarding ions/mol?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Ability to locate an event in space
6.02 x 10^23 ions/mol
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

9. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Voltage
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
P = F(v) = mg(v -terminal)
An odd number

10. The closer the spacing of the anode wire - the better one can specify what?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Where an event took place
The element's mass number
An odd number

11. What type of acid and base would produce a pH closest to 7?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Strong acid and strong base/ weak acid and weak base
The number of electrons emitted
They increase because you hear a lower frequency

12. When an element decreases its atomic number by one what is emitted?
Red
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
It will increase as well because they are directly related - only if pressure is kept constant
Positron because this is known as positron decay/electron capture

13. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
The lowest one
H = negative and S = positive
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
Yes - if the particle's trail is equidistant between two adjacent anodes

14. When does red litmus paper turn blue?
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
Strong acid and strong base/ weak acid and weak base
In the presence of a base
The particle's charge and the magnitude of the electric field

15. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
F = GMm/r^2
Constant to overcome the heat of fusion (solid to liquid state)
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Electron shell number

16. Half-sine wave shape is what kind of wavelength with regards to length?
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
Isolating an atom from minerals by decomposing the minerals with an electric current
L = wavelength/2 so L= (wavelength)(2)
T = (2h/g)^1/2; distance = vt

17. Light can be carried along a distance within a transparent material by means of what?
Helium; 4
B = pVg; density
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Total internal reflection

18. In order to guarantee a non-zero spin how many electrons are needed?
An odd number
H = negative and S = positive
[A]^a[B]^b
The volume of the ice cube or whatever it is

19. What is a metathesis rxn?
T = 2pi/angular velocity; v/r
(density[p])(volume)
400 to 700 nm
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

20. When you are trying to calculate a galvanic cell's emf - what do you look at?
You look at what is being oxidized and reduced in the problem
It will be reduced the voltage produced by the resistor which means IR; E- IR
It decreases; the work done by the gas in expanding decreases its internal energy
That of static friction; there is a net accelerating force on the block once it starts to slide

21. Beta decay is the emission of what? How do you know what it is the emission of?
E = (kq)/r^2
Zero
A positron or electron; when atomic number goes up you know an electron has been emitted
The current is the same

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

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23. What is the unit for Young's Modulus?
That they are catalysts in the rxn because they react with the substrate and are reformed
Pascal (N*m^2)
Liquid displaced by that object
Energy

24. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
The nucleus gains a proton and no neutrons
It will be reduced the voltage produced by the resistor which means IR; E- IR
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

25. How do you find wavelength if you known distance from adjacent crests and troughs?
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
Its twice that distance
NO; reduction-oxidation
They are directly proportional

26. 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
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
The path is longer on the inclined plane so it will take object longer to reach the bottom
T = 2pi/angular velocity; v/r

27. What are the units of an electric field?
Liquid displaced by that object
V/m or N/C
The particle's charge and the magnitude of the electric field
The buoyant force on it; W = mg = pVg

28. What is the doppler equation for wavelength and frequency?
Cathode; anode
How strong a base is
Its twice that distance
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

29. What is the equation for pressure?
Mass number stays the same but the atomic number increases
It can also equal 'mg'; the compressive strength of a substance
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
Density (gravitational constant) height

30. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
The regular one
W = F(displacement)
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Mass number stays the same but the atomic number increases

31. If both weight and bouyant force are dependent on g - that makes g independent of what?
The volume of the ice cube or whatever it is
V/m or N/C
L = wavelength/2 so L= (wavelength)(2)
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

32. What is the relationship between P and n in PV=nRT?
They are directly proportional
Negative
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
L = wavelength/2 so L= (wavelength)(2)

33. The number of incident photons on the cathode affect what?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
The number of electrons emitted
That it is negative
They are directly proportional

34. The free energy change (G) must be negative when what?
H = negative and S = positive
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
Neutrons; atomic number
They do not differ

35. If you are given density and volume how do you find mass?
F = GMm/r^2
(density[p])(volume)
Colligative: it depends on the number of solute molecules in a given volume of water
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

36. Isotopes have diff number of ______ but same what?
Neutrons; atomic number
Polar
Only temperature of the water bath
Its intensity in the spectrum

37. What direction do gravity and bouyancy work? What direction does water pressure work?
Sp^3
-l to +l
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Vertically; perpendicular to all surfaces

38. The volume of an object is equal to water?
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
It decreases; the work done by the gas in expanding decreases its internal energy
Liquid displaced by that object
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

39. 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
Decreasing potential energy
Density (gravitational constant) height
It can absorb light that lets other electrons fill those orbitals

40. The phase difference corresponding to a half wave is what? When do you get destructive interference?
In the presence of a base
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
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
180 degrees; when there is half a wave distance in phase between two waves

41. A plane mirror produces an image where?
Red
(+)
At an equal distance behind it as the object is in front of the mirror
400 to 700 nm

42. The square root of 10^anything is equal to what?
Strong acid and strong base/ weak acid and weak base
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Half of the exponent
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

43. In a rxn - how do you figure out which atom has the highest electron affinity?
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
0 Hz because they are traveling side by side at the same speed
Energy
It can also equal 'mg'; the compressive strength of a substance

44. What is the equation for bouyant force? What is p?
E = (kq)/r^2
B = pVg; density
+/- 1/2
Yes - if the particle's trail is equidistant between two adjacent anodes

45. The force on an electrical charge is what?
The number of electrons emitted
They must balance
F =ma and F= qE
One that has more solute particles per liter of solution

46. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
No - it increases the speed at which the rxn reaches that equilibrium
Neutrons; atomic number
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 can absorb light that lets other electrons fill those orbitals

47. Strength of dispersion force increases with what?
(density[p])(volume)
It has a positive oxidation potential so it is easily oxidized
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Polar

48. Terminal voltage is provided to what?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
T = (2h/g)^1/2; distance = vt
External components of the circuit
Red

49. What is the formula for the power supplied by a battery to accelerate an electron beam?
It can absorb light that lets other electrons fill those orbitals
Yes - if the particle's trail is equidistant between two adjacent anodes
P = IV
The buoyant force on it; W = mg = pVg

50. 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?
That of static friction; there is a net accelerating force on the block once it starts to slide
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
The element's mass number
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect