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. Why are bonds between H and another atom shorter compared to most?
It has a positive oxidation potential so it is easily oxidized
H has a small atomic radius
It's weight = mg; h
E = (kq)/r^2

2. In a healthy person standing at rest - a comparison of arterial blood pressure measured in the arm with that in the leg - shows what about the differences between these pressures?
Gravity
H = negative and S = positive
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
The nucleus gains a proton and no neutrons

3. Isotopes have diff number of ______ but same what?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
1000
Neutrons; atomic number
Its twice that distance

4. What happens if an atom undergoes positron decay or electron capture?
Mag and direction
It will increase as well because they are directly related - only if pressure is kept constant
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

5. How should the period of a waveform be calculated?
Yes - if the particle's trail is equidistant between two adjacent anodes
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
From peak to peak
H has a small atomic radius

6. 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?
[A]^a[B]^b
L = wavelength/2 so L= (wavelength)(2)
Cathode; anode
It has a positive oxidation potential so it is easily oxidized

7. Half-sine wave shape is what kind of wavelength with regards to length?
The volume of the ice cube or whatever it is
Ease of polarizability of the molecule and thus increasing molecular weight of mass
L = wavelength/2 so L= (wavelength)(2)
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

8. When an element decreases its atomic number by one what is emitted?
Positron because this is known as positron decay/electron capture
Positron emission
F =ma and F= qE
The lowest whole number ratio of moles of each element in a mole of a cmpd

9. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Cathode; anode
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
P = F(v) = mg(v -terminal)
The lowest whole number ratio of moles of each element in a mole of a cmpd

10. What is Newton's Universal Law of Gravitation?
At an equal distance behind it as the object is in front of the mirror
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
It's weight = mg; the work would be the weight times the distance fell
F = GMm/r^2

11. If both weight and bouyant force are dependent on g - that makes g independent of what?
Neutrons; atomic number
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Isolating an atom from minerals by decomposing the minerals with an electric current
The volume of the ice cube or whatever it is

12. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
The cross-sectional area through which the fluid flows
E = (kq)/r^2
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
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

13. What do electrolytic techniques involve?
The lowest one
Isolating an atom from minerals by decomposing the minerals with an electric current
They do not differ
Mg

14. The total pressure of a solution is what? Give example.
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
L = wavelength/2 so L= (wavelength)(2)
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
Gravity

15. 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?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The lowest whole number ratio of moles of each element in a mole of a cmpd
(+)
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

16. The basicity constant Kb measures what?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
How strong a base is
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 will be reduced the voltage produced by the resistor which means IR; E- IR

17. 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?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
E = (kq)/r^2
400 to 700 nm

18. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
At an equal distance behind it as the object is in front of the mirror
It decreases; the work done by the gas in expanding decreases its internal energy
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

19. Terminal voltage is provided to what?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Its intensity in the spectrum
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
External components of the circuit

20. What is the spin projection quantum number?
Force times the distance over which the force acts
Constant to overcome the heat of fusion (solid to liquid state)
+/- 1/2
Liquid displaced by that object

21. Why does light travel slower in an optically dense medium than through a vacuum?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Colligative; the number of solute particles present
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

22. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
The cross-sectional area through which the fluid flows
Energy
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
When all the external forces = zero

23. When does red litmus paper turn blue?
1000
The cross-sectional area through which the fluid flows
Strong acid and strong base/ weak acid and weak base
In the presence of a base

24. When you are trying to calculate a galvanic cell's emf - what do you look at?
Neutrons; atomic number
You look at what is being oxidized and reduced in the problem
Gravity
H has a small atomic radius

25. How do you balance redox rxns?

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

26. What color is above 656 nm?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
0 Hz because they are traveling side by side at the same speed
It has a positive oxidation potential so it is easily oxidized
Red

27. The electrical force on a particle depends on what?

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

28. What is the doppler equation for wavelength and frequency?
L = wavelength/2 so L= (wavelength)(2)
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
A saturated solution in which the aqueous ions are in equilibrium with the solid

29. The probability of an X-ray emission event at a given wavelength is measured by what?
When electron falls from high energy to low energy level
Its intensity in the spectrum
L = wavelength/2 so L= (wavelength)(2)
Attractive molecular forces acting between material surfaces in contact

30. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
Its intensity in the spectrum
Electrons from anode and battery
They do not differ
1000

31. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
The element's mass number
Red
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
The path is longer on the inclined plane so it will take object longer to reach the bottom

32. The number of incident photons on the cathode affect what?
Colligative: it depends on the number of solute molecules in a given volume of water
The number of electrons emitted
It can also equal 'mg'; the compressive strength of a substance
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

33. 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?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The reaction between the base and water
They are directly proportional

34. What is the principal quantum number (n)?
Electron shell number
Accelerated by a higher voltage between the cathode and anode
The number of electrons emitted
Mass number stays the same but the atomic number increases

35. What does the empirical formula show?
Mv = mv
The lowest whole number ratio of moles of each element in a mole of a cmpd
The path is longer on the inclined plane so it will take object longer to reach the bottom
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

36. How many mL is in one liter?
1000
The regular one
Attractive molecular forces acting between material surfaces in contact
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

37. What is the unit for Young's Modulus?
Pascal (N*m^2)
Strong acid and strong base/ weak acid and weak base
Decreasing potential energy
Constant to overcome the heat of fusion (solid to liquid state)

38. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
A salt and water
Only temperature of the water bath
A positron or electron; when atomic number goes up you know an electron has been emitted

39. What is the relationship between P and n in PV=nRT?
They must balance
They are directly proportional
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
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

40. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
V/m or N/C
Positive
400 to 700 nm
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

41. The boiling point of a solution is what type of property? Which means is depends only on what?
Colligative; the number of solute particles present
[S][2S]^2 = 4S^3
V/m or N/C
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

42. If temperature arises during a mixture what can you conclude about the enthalpy?
Electron shell number
The particle's charge and the magnitude of the electric field
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
That it is negative

43. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Density (gravitational constant) height
They must balance
It decreases; the work done by the gas in expanding decreases its internal energy

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

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

45. Kb is the equilibrium constant for what?
Positive
The reaction between the base and water
The density of the water and volume of the lead object
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

46. 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?
The cross-sectional area through which the fluid flows
0 Hz because they are traveling side by side at the same speed
The density of the water and volume of the lead object
Voltage

47. The coefficient of kinetic friction is always lower than what? Therefore what?
V/m or N/C
From peak to peak
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
That of static friction; there is a net accelerating force on the block once it starts to slide

48. What is the equation for work done?
The force along the board to the normal force
W = F(displacement)
Ability to locate an event in space
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

49. Friction is caused by what?
Electron shell number
Attractive molecular forces acting between material surfaces in contact
6.02 x 10^23 ions/mol
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

50. The volume of an object is equal to water?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Liquid displaced by that object
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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