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. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
One that has more solute particles per liter of solution
They must balance
Energy

2. The temperature of a metal will not increase above its melting point until what?
Density (gravitational constant) height
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Decreasing potential energy

3. The boiling point of a solution is what type of property? Which means is depends only on what?
7 always!!!
Colligative; the number of solute particles present
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Pascal (N*m^2)

4. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
One that has more solute particles per liter of solution
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
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

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?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
The cross-sectional area through which the fluid flows
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
+/- 1/2

6. When does red litmus paper turn blue?
Energy
In the presence of a base
Negative
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

7. What is the doppler equation for wavelength and frequency?
7 always!!!
Half of the exponent
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

8. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on 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
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
Mag and direction
Colligative: it depends on the number of solute molecules in a given volume of water

9. What is the formula for the power supplied by a battery to accelerate an electron beam?
When all the external forces = zero
P = IV
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
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

10. If you have circuit elements in parallel what is the same across them?
Density (gravitational constant) height
Voltage
Decreasing potential energy
L = wavelength/2 so L= (wavelength)(2)

11. Kb is the equilibrium constant for what?
Gravity
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Strong acid and strong base/ weak acid and weak base
The reaction between the base and water

12. In Bohr model of atom when is energy emitted?
You look at what is being oxidized and reduced in the problem
When electron falls from high energy to low energy level
That they are catalysts in the rxn because they react with the substrate and are reformed
One that has more solute particles per liter of solution

13. What is the principal quantum number (n)?
P = F(v) = mg(v -terminal)
External components of the circuit
Yes - if the particle's trail is equidistant between two adjacent anodes
Electron shell number

14. The coefficient of kinetic friction is always lower than what? Therefore what?
That of static friction; there is a net accelerating force on the block once it starts to slide
A salt and water
External components of the circuit
Positron emission

15. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
3+
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
Red
The lowest one

16. Terminal voltage is provided to what?
External components of the circuit
Accelerated by a higher voltage between the cathode and anode
400 to 700 nm
The volume of the ice cube or whatever it is

17. The phase difference corresponding to a half wave is what? When do you get destructive interference?
B = pVg; density
Momentum
It decreases; the work done by the gas in expanding decreases its internal energy
180 degrees; when there is half a wave distance in phase between two waves

18. A floating ice cube implies that it's weight is balanced by what?
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
Positron because this is known as positron decay/electron capture
The buoyant force on it; W = mg = pVg

19. A plane mirror produces an image where?
At an equal distance behind it as the object is in front of the mirror
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
B = pVg; density
+/- 1/2

20. What does the empirical formula show?
External components of the circuit
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
The lowest whole number ratio of moles of each element in a mole of a cmpd
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

21. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
An odd number
When electron falls from high energy to low energy level
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
When all the external forces = zero

22. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
1000
An odd number
400 to 700 nm

23. Acetic acid is a ______ solvent
E = (kq)/r^2
From peak to peak
P = F(v) = mg(v -terminal)
Polar

24. When a falling mass is at terminal speed - what is the power expended by the air resistance?
P = F(v) = mg(v -terminal)
That it is negative
Going from solid to gas phase
+/- 1/2

25. If you are given density and volume how do you find mass?
(density[p])(volume)
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
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
Ability to locate an event in space

26. Mechanical waves in a medium fxn to transport what?
Energy
It decreases; the work done by the gas in expanding decreases its internal energy
Constant to overcome the heat of fusion (solid to liquid state)
Density (gravitational constant) height

27. Is the work done by air resistance - positive or negative?
The element's mass number
Negative
Neutrons; atomic number
The volume of the ice cube or whatever it is

28. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Sp^3
The path is longer on the inclined plane so it will take object longer to reach the bottom

29. What are the units of an electric field?
Mg
1000
The reaction between the base and water
V/m or N/C

30. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
You look at what is being oxidized and reduced in the problem
400 to 700 nm
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
It will be reduced the voltage produced by the resistor which means IR; E- IR

31. The total pressure of a solution is what? Give example.
Mass number stays the same but the atomic number increases
Energy
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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

32. When you are trying to calculate a galvanic cell's emf - what do you look at?
[A]^a[B]^b
It's weight = mg; h
The lowest whole number ratio of moles of each element in a mole of a cmpd
You look at what is being oxidized and reduced in the problem

33. What color is above 656 nm?
External components of the circuit
Red
The number of electrons emitted
T = 2pi/angular velocity; v/r

34. What is Newton's Universal Law of Gravitation?
One mole of electric charge
L = wavelength/2 so L= (wavelength)(2)
F = GMm/r^2
Isolating an atom from minerals by decomposing the minerals with an electric current

35. What kind of metals react violently with water?
Alkali metals = first column
W = F(displacement)
Constant to overcome the heat of fusion (solid to liquid state)
E = (kq)/r^2

36. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
H = negative and S = positive
It has a positive oxidation potential so it is easily oxidized
They increase because you hear a lower frequency
Isolating an atom from minerals by decomposing the minerals with an electric current

37. When an element decreases its atomic number by one what is emitted?
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)
Attractive molecular forces acting between material surfaces in contact
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
Positron because this is known as positron decay/electron capture

38. The coefficient of static friction is the ratio of what?
The force along the board to the normal force
Accelerated by a higher voltage between the cathode and anode
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
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

39. What if the circuit elements are in series?
Density (gravitational constant) height
Pascal (N*m^2)
Where an event took place
The current is the same

40. How would you find rate of rxn from pH 1 to pH2?
The force along the board to the normal force
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
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
The volume of the ice cube or whatever it is

41. Isotopes have diff number of ______ but same what?
Negative
Neutrons; atomic number
NO; reduction-oxidation
Mag and direction

42. In order to guarantee a non-zero spin how many electrons are needed?
It will increase as well because they are directly related - only if pressure is kept constant
An odd number
3+
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

43. If both weight and bouyant force are dependent on g - that makes g independent of what?
Accelerated by a higher voltage between the cathode and anode
The volume of the ice cube or whatever it is
Constant to overcome the heat of fusion (solid to liquid state)
One mole of electric charge

44. 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?
F =ma and F= qE
Polar
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

45. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
Positron because this is known as positron decay/electron capture
NO; reduction-oxidation
Half of the exponent
Ease of polarizability of the molecule and thus increasing molecular weight of mass

46. Why are bonds between H and another atom shorter compared to most?
H has a small atomic radius
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Mag and direction
Red

47. 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
Attractive molecular forces acting between material surfaces in contact
It will increase as well because they are directly related - only if pressure is kept constant
(density[p])(volume)

48. 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

49. 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?
1000
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
The cross-sectional area through which the fluid flows
T = 2pi/angular velocity; v/r

50. How many mL is in one liter?
1000
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
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
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