SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
Search
Test your basic knowledge |
DSST Physical Sciences2
Start Test
Study First
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. When does red litmus paper turn blue?
Cathode; anode
In the presence of a base
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
One mole of electric charge
2. When you are trying to calculate a galvanic cell's emf - what do you look at?
-l to +l
You look at what is being oxidized and reduced in the problem
Faraday/electrons
A constant force on a mass causes it to have a constant acceleration
3. The volume of an object is equal to water?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Liquid displaced by that object
B = pVg; density
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
4. The temperature of a metal will not increase above its melting point until what?
When you have central atom with six ions on it
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
They must balance
The path is longer on the inclined plane so it will take object longer to reach the bottom
5. The electrical force on a particle depends on what?
6. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
NO; reduction-oxidation
Its momentum is zero because velocity is zero; zero because of conservation of momentum
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
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
7. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
T = 2pi/angular velocity; v/r
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
A positron or electron; when atomic number goes up you know an electron has been emitted
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
8. What is the spin projection quantum number?
It's weight = mg; the work would be the weight times the distance fell
Helium; 4
+/- 1/2
You look at what is being oxidized and reduced in the problem
9. If asked which electron configuration of an element is most stable which one do you choose?
Electrons from anode and battery
When electron falls from high energy to low energy level
The regular one
H = negative and S = positive
10. Heat from friction comes from what?
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
Decreasing potential energy
Yes - if the particle's trail is equidistant between two adjacent anodes
It has a positive oxidation potential so it is easily oxidized
11. The Ksp for a substance of AaBb is what?
Negative
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
[A]^a[B]^b
A constant force on a mass causes it to have a constant acceleration
12. The closer the spacing of the anode wire - the better one can specify what?
Isolating an atom from minerals by decomposing the minerals with an electric current
Where an event took place
When all the external forces = zero
It's weight = mg; h
13. The phase difference corresponding to a half wave is what? When do you get destructive interference?
The reaction between the base and water
When you have central atom with six ions on it
180 degrees; when there is half a wave distance in phase between two waves
Strong acid and strong base/ weak acid and weak base
14. In general what is formed by an acid-base rxn?
The particle's charge and the magnitude of the electric field
A salt and water
Positron emission
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
15. How do you find specific gravity of an object?
6.02 x 10^23 ions/mol
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
Alkali metals = first column
Isolating an atom from minerals by decomposing the minerals with an electric current
16. What is the law of conservation of linear momentum?
7 always!!!
6.02 x 10^23 ions/mol
Mv = mv
It will increase as well because they are directly related - only if pressure is kept constant
17. How do you figure out the literature Ksp value of a compound?
[S][2S]^2 = 4S^3
A saturated solution in which the aqueous ions are in equilibrium with the solid
Polar
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
18. Hydrogen has what kind of standard oxidation or reduction potential?
They do not differ
Alkali metals = first column
Faraday/electrons
Zero
19. How many mL is in one liter?
(+)
The nucleus gains a proton and no neutrons
E = (kq)/r^2
1000
20. 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?
It has a positive oxidation potential so it is easily oxidized
Momentum
In the presence of a base
+/- 1/2
21. What is the amt of energy that a frictional force generates?
Force times the distance over which the force acts
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
A salt and water
22. What is the equation for pressure?
Density (gravitational constant) height
Faraday/electrons
Momentum
Attractive molecular forces acting between material surfaces in contact
23. 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?
Energy
That they are catalysts in the rxn because they react with the substrate and are reformed
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
24. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
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
0 Hz because they are traveling side by side at the same speed
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
25. The free energy change (G) must be negative when what?
H = negative and S = positive
External components of the circuit
F = GMm/r^2
Alkali metals = first column
26. F in the Young's modulus equation can also equal what? What is E?
27. If you are told to find the maximum number of NiCo3 that can form how do you do that?
28. How do you find wavelength if you known distance from adjacent crests and troughs?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Pascal (N*m^2)
Its twice that distance
Force times the distance over which the force acts
29. When is a body in translational equilibrium?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
An odd number
When all the external forces = zero
The lowest whole number ratio of moles of each element in a mole of a cmpd
30. The total pressure of a solution is what? Give example.
Constant to overcome the heat of fusion (solid to liquid state)
The path is longer on the inclined plane so it will take object longer to reach the bottom
7 always!!!
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
31. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
Negative
It will be reduced the voltage produced by the resistor which means IR; E- IR
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Momentum
32. So if you are given an equation and it gives you the E^o for both side equations seen in the big equation - what do you do with them?
Add them together
It's weight = mg; h
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
It can also equal 'mg'; the compressive strength of a substance
33. What is Newton's Universal Law of Gravitation?
Mv = mv
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Gravity
F = GMm/r^2
34. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Constant to overcome the heat of fusion (solid to liquid state)
It can also equal 'mg'; the compressive strength of a substance
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
35. 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
Voltage
Energy
When electron falls from high energy to low energy level
36. A nearsighted person has what type of focal length? Thus what do we do to correct this?
The current is the same
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Strong acid and strong base/ weak acid and weak base
1000
37. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
[A]^a[B]^b
Only temperature of the water bath
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)
Isolating an atom from minerals by decomposing the minerals with an electric current
38. In PV=nRT - if temp increases what will happen to volume?
Half of the exponent
How strong a base is
W = F(displacement)
It will increase as well because they are directly related - only if pressure is kept constant
39. How do you find 'g' from Newton's law of gravity?
F =ma and F= qE
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Gravity
Pascal (N*m^2)
40. If you have circuit elements in parallel what is the same across them?
Mg
Voltage
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
[A]^a[B]^b
41. The coefficient of static friction is the ratio of 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
The force along the board to the normal force
The lowest whole number ratio of moles of each element in a mole of a cmpd
42. Is the work done by air resistance - positive or negative?
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
Liquid displaced by that object
Negative
43. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Sp^3
Mv = mv
Strong acid and strong base/ weak acid and weak base
It's weight = mg; h
44. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Mv = mv
The particle's charge and the magnitude of the electric field
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
0 Hz because they are traveling side by side at the same speed
45. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
They do not differ
Vertically; perpendicular to all surfaces
Positive
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
46. 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
The lowest one
Half of the exponent
Vertically; perpendicular to all surfaces
47. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
T = (2h/g)^1/2; distance = vt
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 decreases; the work done by the gas in expanding decreases its internal energy
48. 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?
T = 2pi/angular velocity; v/r
H has a small atomic radius
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
0 Hz because they are traveling side by side at the same speed
49. When something is falling what is the force acting on it? Thus what would be the work done?
50. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
The nucleus gains a proton and no neutrons
They do not differ
Constant to overcome the heat of fusion (solid to liquid state)
Energy