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. What is Newton's Universal Law of Gravitation?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
L = wavelength/2 so L= (wavelength)(2)
NO; reduction-oxidation
F = GMm/r^2

2. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
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
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Alkali metals = first column

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

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

4. The force on an electrical charge is what?
At an equal distance behind it as the object is in front of the mirror
Zero
F =ma and F= qE
Attractive molecular forces acting between material surfaces in contact

5. 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?
The regular one
W = F(displacement)
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

6. 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

7. The square root of 10^anything is equal to what?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Sp^3
Half of the exponent
F =ma and F= qE

8. What is the equation for work done?
The number of electrons emitted
The cross-sectional area through which the fluid flows
W = F(displacement)
It has a positive oxidation potential so it is easily oxidized

9. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
H has a small atomic radius
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
The lowest one
The nucleus gains a proton and no neutrons

10. How do you figure out the literature Ksp value of a compound?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
A positron or electron; when atomic number goes up you know an electron has been emitted
Electrons from anode and battery

11. The phase difference corresponding to a half wave is what? When do you get destructive interference?
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
Mv = mv
180 degrees; when there is half a wave distance in phase between two waves
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

12. What is the equation for a period (T)? What is the equation for angular velocity?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Strong acid and strong base/ weak acid and weak base
T = 2pi/angular velocity; v/r
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)

13. 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?
Isolating an atom from minerals by decomposing the minerals with an electric current
-l to +l
[S][2S]^2 = 4S^3
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

14. What energy conversion describes best what takes place in a battery-powered resistive circuit?
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
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
No - it increases the speed at which the rxn reaches that equilibrium
Force times the distance over which the force acts

15. In Bohr model of atom when is energy emitted?
When electron falls from high energy to low energy level
The particle's charge and the magnitude of the electric field
Its intensity in the spectrum
A positron or electron; when atomic number goes up you know an electron has been emitted

16. Beta decay is the emission of what? How do you know what it is the emission of?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Faraday/electrons
A positron or electron; when atomic number goes up you know an electron has been emitted
The lowest whole number ratio of moles of each element in a mole of a cmpd

17. What is Avagadro's number regarding ions/mol?
The element's mass number
T = (2h/g)^1/2; distance = vt
6.02 x 10^23 ions/mol
Energy

18. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
Momentum
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

19. What is the unit for Young's Modulus?
Pascal (N*m^2)
That they are catalysts in the rxn because they react with the substrate and are reformed
(density[p])(volume)
You look at what is being oxidized and reduced in the problem

20. How would you find rate of rxn from pH 1 to pH2?
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
T = 2pi/angular velocity; v/r
-l to +l
Mass number stays the same but the atomic number increases

21. Acetic acid is a ______ solvent
Polar
Energy
F =ma and F= qE
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

22. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Positive
They increase because you hear a lower frequency
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
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

23. Is the work done by air resistance - positive or negative?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
At an equal distance behind it as the object is in front of the mirror
Negative
Going from solid to gas phase

24. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
0 Hz because they are traveling side by side at the same speed
Colligative: it depends on the number of solute molecules in a given volume of water
Pascal (N*m^2)
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

25. If asked which electron configuration of an element is most stable which one do you choose?
Mag and direction
It can also equal 'mg'; the compressive strength of a substance
The regular one
At an equal distance behind it as the object is in front of the mirror

26. Terminal voltage is provided to what?
7 always!!!
External components of the circuit
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
V/m or N/C

27. What type of acid and base would produce a pH closest to 7?
It can absorb light that lets other electrons fill those orbitals
Negative
Strong acid and strong base/ weak acid and weak base
V/m or N/C

28. How do you balance redox rxns?

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

29. The electrons emitted from cathode are replaced with what?
Density (gravitational constant) height
A salt and water
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Electrons from anode and battery

30. The Ksp for a substance of AaBb is what?
Electrons from anode and battery
[A]^a[B]^b
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
The volume of the ice cube or whatever it is

31. What do electrolytic techniques involve?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Isolating an atom from minerals by decomposing the minerals with an electric current
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

32. The closer the spacing of the anode wire - the better one can specify what?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Where an event took place
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
(+)

33. In a rxn - how do you figure out which atom has the highest electron affinity?
Mag and direction
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
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

34. Heat from friction comes from what?
(+)
They are directly proportional
Cathode; anode
Decreasing potential energy

35. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
That they are catalysts in the rxn because they react with the substrate and are reformed
T = (2h/g)^1/2; distance = vt
Going from solid to gas phase
Ability to locate an event in space

36. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
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
Sp^3
NO; reduction-oxidation
The lowest whole number ratio of moles of each element in a mole of a cmpd

37. When an element decreases its atomic number by one what is emitted?
Positron because this is known as positron decay/electron capture
The density of the water and volume of the lead object
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Constant to overcome the heat of fusion (solid to liquid state)

38. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
Mg
F =ma and F= qE
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
That of static friction; there is a net accelerating force on the block once it starts to slide

39. In radioactive decay the atomic number (A) and mass number (Z) must what?
A constant force on a mass causes it to have a constant acceleration
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 must balance
It will increase as well because they are directly related - only if pressure is kept constant

40. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
That of static friction; there is a net accelerating force on the block once it starts to slide
It decreases; the work done by the gas in expanding decreases its internal energy
You look at what is being oxidized and reduced in the problem
L = wavelength/2 so L= (wavelength)(2)

41. Neither N2 or O2 have a permanent what? What does this mean?
It has a positive oxidation potential so it is easily oxidized
H = negative and S = positive
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
The element's mass number

42. When a falling mass is at terminal speed - what is the power expended by the air resistance?
T = (2h/g)^1/2; distance = vt
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)
P = F(v) = mg(v -terminal)
Electrons from anode and battery

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

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

44. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Helium; 4
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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
Positron emission

45. What happens to a negatively charged particle put between two parallel plates?
The current is the same
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
When electron falls from high energy to low energy level
[S][2S]^2 = 4S^3

46. 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?
Alkali metals = first column
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
Vertically; perpendicular to all surfaces
Its momentum is zero because velocity is zero; zero because of conservation of momentum

47. What is different between an inclined plane and free fall?
The path is longer on the inclined plane so it will take object longer to reach the bottom
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
6.02 x 10^23 ions/mol
When all the external forces = zero

48. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
They must balance
[S][2S]^2 = 4S^3
Mg
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

49. 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
It can also equal 'mg'; the compressive strength of a substance
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

50. The temperature of a metal will not increase above its melting point until what?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
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