Discuss why the constituents of an aqueous solution can only be separated by evaporation and the concentration of the solute in the solution calculated in % (m/v) and in molarity
In: Chemistry
Discuss the DSM-V and how this is used to diagnosis disorders. Do you agree or disagree that individuals with mental disorders should be labeled?
In: Psychology
Apply human rights, legal rights and moral rights to the Tennessee v. Garner case, discussing the ramifications of each. Please help
In: Psychology
1. What is the "nature-nurture question" (or nature v. nurture debate)? And, which way do sociologists (largely) lean on this question?
In: Psychology
The economic feasibility of a project relies on the identification of its:
I. likely benefits, its expected costs and every cash flow related to the project
II. likely costs and benefits and its expected economic life
III. likely costs and benefits, opportunity costs and irrelevant cash flows
IV. the appropriate inflation and discount rates for the project
V. likely costs, expected depreciation and material sunk cash flows
Select one:
a. III and IV
b. I and III
c. II and IV
d. II and V
e. II and III
In: Finance
Consider a galvanic cell based upon the
following half reactions:
Ag+ + e- → Ag; 0.80 V
Cu2+ + 2 e- → Cu; 0.34 V
Which of the following changes will decrease the potential of the
cell?
Adding Cu2+ ions to the copper half reaction (assuming no volume change). |
|
Adding equal amounts of water to both half reactions. |
|
Adding Ag+ ions to the silver half reaction (assume no volume change) |
|
Removing Cu2+ ions from solution by precipitating them out of the copper half reaction (assume no volume change). |
In: Chemistry
18) A proton travels with a speed (v) of 5m / s in a 2T magnetic
field (B). The angle between v
and B is 22nd. What is the magnitude of the magnetic force acting
on the proton?
(a) 14.8x10-19N (b) 6x10-19N (c) 0N (d) 16x10-19N
19) An electron experiences a magnetic force FB = (i 2.4 - j 1.8)
x10-13N when it passes through a field
magnetic B = k 0.7T. The magnitude of the electron velocity
is:
(a) 1.6x106m / s (b) 2.7x106m / s (c) 2.1x106m / s (d) 4.3x106m /
s
In: Physics
A battery that has a voltage of 20V is attached to a circuit. A current of 4A is created in the circuit. What is the resistance of the circuit? A series circuit with made up of a 12 V battery, a 4Ω resistor, a 8Ω resistor, and a 12Ω resistor. Calculate the equivalent resistance of the circuit. B. Calculate the voltage drop at the 8Ω resistor. A parallel circuit comprised of a 24 V battery and two 48Ω resistor. Calculate the equivalent resistance of the circuit. B. Calculate the total current in the circuit. show the equation you are using, substitute with units, and give your answer with units
In: Physics
a) Typical electric fields in thunderstorms average around 105 V/m. Consider a (roughly) cylindrical thundercloud with height 10 km and diameter 20 km and assume a uniform electric field of 105 V/m. Find the electrical energy contained in the cloud (2 s.f.).
b) For the same thundercloud and imagining that the electric field points vertically downwards, calculate the minimum charge on a 5-mg raindrop that would cause it to accelerate upwards (2 s.f.). (Enter the magnitude of the charge into D2L to check your answer, but the sign is important too in your written solution.)
In: Physics
A voltaic cell consists of a Zn/Zn2+ half-cell and a Ni/Ni2+ half-cell at 25 ∘C. The initial concentrations of Ni2+ and Zn2+ are 1.50 M and 0.110 M , respectively. The volume of half-cells is the same.
Part A
What is the initial cell potential?
Part B
What is the cell potential when the concentration of Ni2+ has fallen to 0.600 M ?
Part C
What is the concentrations of Ni2+ when the cell potential falls to 0.46 V ?
Part D
What is the concentration of Zn2+ when the cell potential falls to 0.46 V ?
In: Chemistry