Test your basic knowledge |

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. 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?
Constant to overcome the heat of fusion (solid to liquid state)
Its momentum is zero because velocity is zero; zero because of conservation of momentum
-l to +l
Helium; 4

2. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Mg
One that has more solute particles per liter of solution
Its twice that distance

3. If asked which electron configuration of an element is most stable which one do you choose?
The path is longer on the inclined plane so it will take object longer to reach the bottom
It will increase as well because they are directly related - only if pressure is kept constant
The regular one
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

4. What is the equation for bouyant force? What is p?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
A constant force on a mass causes it to have a constant acceleration
B = pVg; density
Ability to locate an event in space

5. 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?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

6. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
When electron falls from high energy to low energy level
Voltage
Only temperature of the water bath
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. Hydrogen has what kind of standard oxidation or reduction potential?
Zero
180 degrees; when there is half a wave distance in phase between two waves
Only temperature of the water bath
Momentum

8. The coefficient of static friction is the ratio of what?
The force along the board to the normal force
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
Positron emission
Attractive molecular forces acting between material surfaces in contact

9. How many mL is in one liter?
Momentum
It has a positive oxidation potential so it is easily oxidized
1000
One that has more solute particles per liter of solution

10. In order to guarantee a non-zero spin how many electrons are needed?
F = GMm/r^2
An odd number
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
[S][2S]^2 = 4S^3

11. What is one faraday equal to?
One mole of electric charge
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 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

12. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
(+)
Ease of polarizability of the molecule and thus increasing molecular weight of mass
That they are catalysts in the rxn because they react with the substrate and are reformed
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

13. Beta decay is the same as what?
V/m or N/C
Positron emission
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

14. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
Liquid displaced by that object
Voltage
They increase because you hear a lower frequency
It's weight = mg; h

15. What are the units of an electric field?
L = wavelength/2 so L= (wavelength)(2)
[S][2S]^2 = 4S^3
Alkali metals = first column
V/m or N/C

16. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
P = F(v) = mg(v -terminal)
Sp^3
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
It can absorb light that lets other electrons fill those orbitals

17. How do you find 'g' from Newton's law of gravity?
It's weight = mg; h
T = (2h/g)^1/2; distance = vt
Pascal (N*m^2)
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

18. How do you find specific gravity of an object?
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
T = 2pi/angular velocity; v/r
Total internal reflection
The density of the water and volume of the lead object

19. What happens to a negatively charged particle put between two parallel plates?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Half of the exponent
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
Electron shell number

20. What is the equation for work done?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
W = F(displacement)
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Red

21. 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?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Its twice that distance
(density[p])(volume)
They are directly proportional

22. For a given flow rate - the speed of fluid flow is inversely proportional to what?
Momentum
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The cross-sectional area through which the fluid flows
(density[p])(volume)

23. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Mass number stays the same but the atomic number increases
-l to +l
Positive
NO; reduction-oxidation

24. What type of acid and base would produce a pH closest to 7?
Force times the distance over which the force acts
In the presence of a base
Strong acid and strong base/ weak acid and weak base
Vertically; perpendicular to all surfaces

25. In radioactive decay the atomic number (A) and mass number (Z) must what?
Faraday/electrons
They must balance
Decreasing potential energy
A constant force on a mass causes it to have a constant acceleration

26. Nuclear masses can be approximated from what?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

27. The volume of an object is equal to water?
[A]^a[B]^b
Liquid displaced by that object
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
Its twice that distance

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?
They are directly proportional
The density of the water and volume of the lead object
The force along the board to the normal force
Its intensity in the spectrum

29. If temperature arises during a mixture what can you conclude about the enthalpy?
One that has more solute particles per liter of solution
H has a small atomic radius
That it is negative
Sp^3

30. A pendulum moves under the influence of what?
The buoyant force on it; W = mg = pVg
Gravity
T = 2pi/angular velocity; v/r
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

31. The square root of 10^anything is equal to what?
Vertically; perpendicular to all surfaces
+/- 1/2
Half of the exponent
Energy

32. What is the unit for Young's Modulus?
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)
Pascal (N*m^2)
V/m or N/C
You look at what is being oxidized and reduced in the problem

33. What do electrolytic techniques involve?
[S][2S]^2 = 4S^3
Faraday/electrons
Isolating an atom from minerals by decomposing the minerals with an electric current
Mg

34. What is newton's second law?
Its twice that distance
NO; reduction-oxidation
180 degrees; when there is half a wave distance in phase between two waves
A constant force on a mass causes it to have a constant acceleration

35. What kind of metals react violently with water?
Alkali metals = first column
Add them together
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
[A]^a[B]^b

36. Beta decay is the emission of what? How do you know what it is the emission of?
Add them together
A positron or electron; when atomic number goes up you know an electron has been emitted
Colligative: it depends on the number of solute molecules in a given volume of water
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

37. The phase difference corresponding to a half wave is what? When do you get destructive interference?
T = (2h/g)^1/2; distance = vt
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Momentum
180 degrees; when there is half a wave distance in phase between two waves

38. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
That they are catalysts in the rxn because they react with the substrate and are reformed
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
F =ma and F= qE
Mv = mv

39. Why are bonds between H and another atom shorter compared to most?
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
One mole of electric charge
H has a small atomic radius

40. Always remember that velocity has ____ and ____
When HIn is turned into In- - which is dependent upon the pKa of the indicator
When you have central atom with six ions on it
L = wavelength/2 so L= (wavelength)(2)
Mag and direction

41. How would you find rate of rxn from pH 1 to pH2?
It decreases; the work done by the gas in expanding decreases its internal energy
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
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
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

42. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Helium; 4
NO; reduction-oxidation
A constant force on a mass causes it to have a constant acceleration
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

43. The visible spectrum ranges from ____ to _____
400 to 700 nm
The cross-sectional area through which the fluid flows
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
It's weight = mg; the work would be the weight times the distance fell

44. Equivalent mass is what?
Colligative; the number of solute particles present
Ability to locate an event in space
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 will increase as well because they are directly related - only if pressure is kept constant

45. 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?
Faraday/electrons
The regular one
It has a positive oxidation potential so it is easily oxidized
P = F(v) = mg(v -terminal)

46. What is the principal quantum number (n)?
F = GMm/r^2
T = (2h/g)^1/2; distance = vt
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Electron shell number

47. The force on an electrical charge is what?
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
P = F(v) = mg(v -terminal)
F =ma and F= qE
Positron emission

48. The coefficient of kinetic friction is always lower than what? Therefore what?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Red
One mole of electric charge
That of static friction; there is a net accelerating force on the block once it starts to slide

49. So if you have a voltage of 1/4V it will be reduced by what? Thus what will be the equation for the terminal voltage?
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
It will be reduced the voltage produced by the resistor which means IR; E- IR
Energy

50. What is the formula for the power supplied by a battery to accelerate an electron beam?
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
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Sp^3
P = IV