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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. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
The force along the board to the normal force
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Mass number stays the same but the atomic number increases
That of static friction; there is a net accelerating force on the block once it starts to slide

2. Kb is the equilibrium constant for what?
External components of the circuit
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
The reaction between the base and water
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

3. 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?
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
They are directly proportional
The nucleus gains a proton and no neutrons
Ability to locate an event in space

4. What happens to a negatively charged particle put between two parallel plates?
Cathode; anode
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
It will be reduced the voltage produced by the resistor which means IR; E- IR
Energy

5. The force on an electrical charge is what?
The path is longer on the inclined plane so it will take object longer to reach the bottom
F =ma and F= qE
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Its momentum is zero because velocity is zero; zero because of conservation of momentum

6. What is the doppler equation for wavelength and frequency?
No - it increases the speed at which the rxn reaches that equilibrium
A saturated solution in which the aqueous ions are in equilibrium with the solid
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

7. What is one faraday equal to?
-l to +l
One mole of electric charge
Isolating an atom from minerals by decomposing the minerals with an electric current
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

8. What is the law of conservation of linear momentum?
Mv = mv
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
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
W = F(displacement)

9. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
The nucleus gains a proton and no neutrons
F =ma and F= qE
It decreases; the work done by the gas in expanding decreases its internal energy
Half of the exponent

10. When a falling mass is at terminal speed - what is the power expended by the air resistance?
Electron shell number
B = pVg; density
P = F(v) = mg(v -terminal)
E = (kq)/r^2

11. A floating ice cube implies that it's weight is balanced by what?
Polar
That they are catalysts in the rxn because they react with the substrate and are reformed
L = wavelength/2 so L= (wavelength)(2)
The buoyant force on it; W = mg = pVg

12. The square root of 10^anything is equal to what?
Alkali metals = first column
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
Half of the exponent
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

13. How should the period of a waveform be calculated?
P = IV
From peak to peak
External components of the circuit
Colligative; the number of solute particles present

14. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
They do not differ
The nucleus gains a proton and no neutrons
Electrons from anode and battery

15. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
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
Positive
An odd number
Mg

16. The phase difference corresponding to a half wave is what? When do you get destructive interference?
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 volume of the ice cube or whatever it is
Force times the distance over which the force acts
180 degrees; when there is half a wave distance in phase between two waves

17. What is the unit for Young's Modulus?
Pascal (N*m^2)
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
Mg
(+)

18. The basicity constant Kb measures what?
Decreasing potential energy
400 to 700 nm
How strong a base is
Cathode; anode

19. What kind of metals react violently with water?
Ability to locate an event in space
Alkali metals = first column
Colligative; the number of solute particles present
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

20. When does red litmus paper turn blue?
3+
Total internal reflection
In the presence of a base
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

21. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
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
The path is longer on the inclined plane so it will take object longer to reach the bottom
The force along the board to the normal force
Only temperature of the water bath

22. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
One that has more solute particles per liter of solution
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
[S][2S]^2 = 4S^3
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

23. What do electrolytic techniques involve?
Gravity
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Isolating an atom from minerals by decomposing the minerals with an electric current
Vertically; perpendicular to all surfaces

24. What type of acid and base would produce a pH closest to 7?
Strong acid and strong base/ weak acid and weak base
L = wavelength/2 so L= (wavelength)(2)
Add them together
The buoyant force on it; W = mg = pVg

25. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Strong acid and strong base/ weak acid and weak base
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Pascal (N*m^2)

26. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
That they are catalysts in the rxn because they react with the substrate and are reformed
Faraday/electrons
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

27. If temperature arises during a mixture what can you conclude about the enthalpy?
When you have central atom with six ions on it
The force along the board to the normal force
Force times the distance over which the force acts
That it is negative

28. What is the angular momentum quantum number (l)? It is the same as what? What does an S orbital appear to look like? What would it's (l) be?
They do not differ
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
L = wavelength/2 so L= (wavelength)(2)
Ability to locate an event in space

29. Melting occurs at what type of temperature? Why?
The path is longer on the inclined plane so it will take object longer to reach the bottom
Constant to overcome the heat of fusion (solid to liquid state)
Voltage
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

30. When something is falling what is the force acting on it? Thus what would be the work done?

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31. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
Red
180 degrees; when there is half a wave distance in phase between two waves
When you have central atom with six ions on it
One that has more solute particles per liter of solution

32. What is newton's second law?
A constant force on a mass causes it to have a constant acceleration
T = 2pi/angular velocity; v/r
+/- 1/2
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

33. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
Gravity
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
Polar
At an equal distance behind it as the object is in front of the mirror

34. Can a catalyst shift equilibrium?
They are directly proportional
External components of the circuit
It will increase as well because they are directly related - only if pressure is kept constant
No - it increases the speed at which the rxn reaches that equilibrium

35. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
NO; reduction-oxidation
They are directly proportional
When electron falls from high energy to low energy level

36. What is weight equal to?
Mg
The force along the board to the normal force
Pascal (N*m^2)
Yes - if the particle's trail is equidistant between two adjacent anodes

37. What is the equation for pressure?
The reaction between the base and water
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
Total internal reflection

38. A nearsighted person has what type of focal length? Thus what do we do to correct this?
It will be reduced the voltage produced by the resistor which means IR; E- IR
External components of the circuit
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Pascal (N*m^2)

39. The coefficient of static friction is the ratio of what?
It can also equal 'mg'; the compressive strength of a substance
The force along the board to the normal force
Energy
When all the external forces = zero

40. What is the magnitude of the electric field produced by a point 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
E = (kq)/r^2
That of static friction; there is a net accelerating force on the block once it starts to slide
Vertically; perpendicular to all surfaces

41. The electrons emitted from cathode are replaced with what?
Energy
Going from solid to gas phase
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Electrons from anode and battery

42. If you are given density and volume how do you find mass?
Going from solid to gas phase
(density[p])(volume)
Half of the exponent
The particle's charge and the magnitude of the electric field

43. Always remember that velocity has ____ and ____
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Mag and direction
Electrons from anode and battery
Ease of polarizability of the molecule and thus increasing molecular weight of mass

44. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
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
Accelerated by a higher voltage between the cathode and anode
Decreasing potential energy
The lowest one

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

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46. Isotopes have diff number of ______ but same what?
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 reaction between the base and water
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Neutrons; atomic number

47. Heat from friction comes from what?
Decreasing potential energy
The force along the board to the normal force
They are directly proportional
Total internal reflection

48. What is different between an inclined plane and free fall?
Electrons from anode and battery
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
The path is longer on the inclined plane so it will take object longer to reach the bottom
(density[p])(volume)

49. What happens if an atom undergoes positron decay or electron capture?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
L = wavelength/2 so L= (wavelength)(2)
P = F(v) = mg(v -terminal)
The volume of the ice cube or whatever it is

50. Strength of dispersion force increases with what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
That of static friction; there is a net accelerating force on the block once it starts to slide
A constant force on a mass causes it to have a constant acceleration
When all the external forces = zero