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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 is the amt of energy that a frictional force generates?
[A]^a[B]^b
Ability to locate an event in space
Force times the distance over which the force acts
It can absorb light that lets other electrons fill those orbitals

2. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
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
Isolating an atom from minerals by decomposing the minerals with an electric current
Voltage
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

3. The volume of an object is equal to water?
One that has more solute particles per liter of solution
It has a positive oxidation potential so it is easily oxidized
Liquid displaced by that object
Red

4. Can a catalyst shift equilibrium?
No - it increases the speed at which the rxn reaches that equilibrium
(+)
180 degrees; when there is half a wave distance in phase between two waves
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

5. The probability of an X-ray emission event at a given wavelength is measured by what?
Its intensity in the spectrum
It decreases; the work done by the gas in expanding decreases its internal energy
Positive
Isolating an atom from minerals by decomposing the minerals with an electric current

6. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
No - it increases the speed at which the rxn reaches that equilibrium
Decreasing potential energy
Sp^3
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

7. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Positive
Going from solid to gas phase
The density of the water and volume of the lead object
400 to 700 nm

8. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
The lowest one
180 degrees; when there is half a wave distance in phase between two waves
Its intensity in the spectrum
E = (kq)/r^2

9. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
P = F(v) = mg(v -terminal)
They do not differ
A salt and water
Density (gravitational constant) height

10. What is the formula for the power supplied by a battery to accelerate an electron beam?
P = IV
Momentum
From peak to peak
7 always!!!

11. If you have a decrease of pressure to which side of the equation is it equilibrium shifted towards? What about if you increase temperature?

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

13. The Ksp for a substance of AaBb is what?
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
Gravity
[A]^a[B]^b
Electrons from anode and battery

14. 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?
At an equal distance behind it as the object is in front of the mirror
Mass number stays the same but the atomic number increases
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
It will be reduced the voltage produced by the resistor which means IR; E- IR

15. When a falling mass is at terminal speed - what is the power expended by the air resistance?
P = F(v) = mg(v -terminal)
7 always!!!
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
V/m or N/C

16. What is weight equal to?
Colligative; the number of solute particles present
-l to +l
Mg
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

17. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
It decreases; the work done by the gas in expanding decreases its internal energy
A salt and 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
[S][2S]^2 = 4S^3

18. When an element decreases its atomic number by one what is emitted?
H = negative and S = positive
Positron because this is known as positron decay/electron capture
It has a positive oxidation potential so it is easily oxidized
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

19. When is a body in translational equilibrium?
When all the external forces = zero
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
Voltage
[S][2S]^2 = 4S^3

20. What is the relationship between P and n in PV=nRT?
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 force along the board to the normal force
They are directly proportional
H has a small atomic radius

21. How many mL is in one liter?
1000
At an equal distance behind it as the object is in front of the mirror
F = GMm/r^2
It's weight = mg; h

22. How would you find rate of rxn from pH 1 to pH2?
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
It will increase as well because they are directly related - only if pressure is kept constant
The cross-sectional area through which the fluid flows
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

23. The coefficient of static friction is the ratio of what?
The force along the board to the normal force
They must balance
A salt and 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

24. The concentration of OH and H30 ions are approximately equal at what pH?
Electrons from anode and battery
3+
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
7 always!!!

25. Always remember that velocity has ____ and ____
It has a positive oxidation potential so it is easily oxidized
The force along the board to the normal force
V/m or N/C
Mag and direction

26. The visible spectrum ranges from ____ to _____
400 to 700 nm
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
A constant force on a mass causes it to have a constant acceleration
Electrons from anode and battery

27. The boiling point of a solution is what type of property? Which means is depends only on what?
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
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Voltage
Colligative; the number of solute particles present

28. What kind of charge is on Al?
3+
Helium; 4
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
It has a positive oxidation potential so it is easily oxidized

29. When does red litmus paper turn blue?
In the presence of a base
W = F(displacement)
They increase because you hear a lower frequency
T = 2pi/angular velocity; v/r

30. If you have circuit elements in parallel what is the same across them?
They must balance
The force along the board to the normal force
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
Voltage

31. The coefficient of kinetic friction is always lower than what? Therefore what?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
That of static friction; there is a net accelerating force on the block once it starts to slide
Negative
It decreases; the work done by the gas in expanding decreases its internal energy

32. Equivalent mass is what?
A constant force on a mass causes it to have a constant acceleration
L = wavelength/2 so L= (wavelength)(2)
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
Total internal reflection

33. The number of incident photons on the cathode affect what?
Neutrons; atomic number
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
The number of electrons emitted

34. In Bohr model of atom when is energy emitted?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
When electron falls from high energy to low energy level
Mg
Total internal reflection

35. In general what is formed by an acid-base rxn?
A salt and water
F = GMm/r^2
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
Positive

36. The freezing point of an aqueous solution is what kind of property? What does this mean?
V/m or N/C
Colligative: it depends on the number of solute molecules in a given volume of water
The lowest whole number ratio of moles of each element in a mole of a cmpd
Momentum

37. If both weight and bouyant force are dependent on g - that makes g independent of what?
F =ma and F= qE
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
The volume of the ice cube or whatever it is
Add them together

38. In order to increase the kinetic energy of electrons - they must be what?
Accelerated by a higher voltage between the cathode and anode
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
A saturated solution in which the aqueous ions are in equilibrium with the solid
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

39. What is the principal quantum number (n)?
When electron falls from high energy to low energy level
The path is longer on the inclined plane so it will take object longer to reach the bottom
Colligative: it depends on the number of solute molecules in a given volume of water
Electron shell number

40. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
It can absorb light that lets other electrons fill those orbitals
When electron falls from high energy to low energy level
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 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

41. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
It's weight = mg; h
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
[S][2S]^2 = 4S^3
T = (2h/g)^1/2; distance = vt

42. Strength of dispersion force increases with what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Only temperature of the water bath
F = GMm/r^2
Its momentum is zero because velocity is zero; zero because of conservation of momentum

43. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
Mass number stays the same but the atomic number increases
It decreases; the work done by the gas in expanding decreases its internal energy
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
It can absorb light that lets other electrons fill those orbitals

44. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Only temperature of the water bath
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

45. What direction do gravity and bouyancy work? What direction does water pressure work?
L = wavelength/2 so L= (wavelength)(2)
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
They are directly proportional
Vertically; perpendicular to all surfaces

46. F in the Young's modulus equation can also equal what? What is E?

47. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
Pascal (N*m^2)
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
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
From peak to peak

48. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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
It will increase as well because they are directly related - only if pressure is kept constant

49. What is newton's second law?
T = (2h/g)^1/2; distance = vt
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Polar
A constant force on a mass causes it to have a constant acceleration

50. In order to guarantee a non-zero spin how many electrons are needed?
They are directly proportional
When you have central atom with six ions on it
An odd number
+/- 1/2