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1. Explain whether each of the following government activities is motivated by a concern about equality or a concern about efficiency. In the case of efficiency, discuss the type of market failure involved. a. regulating cable TV prices b. providing some poor people with vouchers that can be used to buy food c. prohibiting smoking in public places d. breaking up Standard Oil (which once owned 90 percent of all oil refineries) into several smaller companies e. imposing higher personal income tax rates on people with higher incomes f. instituting laws against driving while intoxicated
The standard enthalpy of a reaction can be ___________.
a. calculated as the sum between the difference of the standard molar enthalpies of formation of products only.
b. obtained as the difference between the sum of the standard molar enthalpies of formation of products and reactants.
c. calculated as the difference between the sum of the standard molar enthalpies of formation of reactants only.
d. obtained from the different thermochemical equations by applying the first law of thermodynamics.
The heat capacity of a substance is determined ______________.
a. by a constant specific heat values regardless of physical states.
b. through careful measure of specific heat values.
c. through calorimetry.
d. by increasing the temperature by 1°C.
Heat is a form energy transfer between objects as an effect of their difference in _________.
a. volume
b. energy
c. pressure
d. temperature
Q1. A bed mart company is in the business of manufacturing beds and pillows. The company has 40 hours for assembly and 32 hours for finishing work per day. Manufacturing of a bed requires 4 hours for assembly and 2 hours for finishing. Similarly a pillow requires 2 hours for assembly and 4 hours for finishing. Profitability analysis indicates that every bed would contribute Birr 80, while a pillow contribution is Birr 55 respectively. Find out the daily production of the company to maximise the contribution (profit). Solve the problem by graphical method. Q2. Maximise 1170x1 + 1110x2 Subject to: 9x1 + 5x2 ≥ 500 7x1 + 9x2 ≥ 300 5x1 + 3x2 ≤ 1500 7x1 + 9x2 ≤ 1900 2x1 + 4x2 ≤ 1000 x1, x2 ≥ 0 -Find graphically the feasible region and the optimal solution.
Explain the phenomena or theory involve why certain actions affect the rate of reaction
using platinum in manufacturing nitric acid reduces the production cost
Let P (x) be the statement "x can speak Russian" and let
Q(x) be the statement "x knows the computer language
C++." Express each of these sentences in terms of P (x),
Q (x), quantifiers, and logical connectives. The domain
for quantifiers consists of all students at your school.
The first law of thermodynamics hints that __________.
a. net energy flow to or from any system comes from the surroundings.
b. net heat flow to or from any system comes in either energy or work.
c. net energy flow to or from any system comes in either heat or work.
d. net energy flow to or from any surroundings comes in either heat or work.
The amount of heat absorbed or released by a chemical reaction at constant atmospheric pressure .
a. enthalpy of reaction
b. enthalpy of products
c. enthalpy
d. standard molar enthalpy
Thermal decomposition of limestone to form calcium oxide and carbon dioxide is ________.
a. partly exothermic
b. exothermic
c. endothermic
d. both endothermic and exothermic
Explain the phenomena or theory involves certain actions affects the rate of reaction
using platinum in manufacturing nitric acid reduces the production cost
A metal has an atomic radius of 0.1335 nm . The volume of its cubic unit cell is
2.9305 x10-23 cm3. What is the geometry of the unit cell?
{x/x is an integer such as x2 =2}
1. Suppose Mary intends to sell two software products X & Y for the next convention &
budgets the following.
X Y Total
Units Sold. 60 40 100
Revenues, $200 $100 per unit $12,000 $ 4,000 $16,000
Variable Costs, $120 $70 per unit 7,200 2,800 10,000
Unit Contribution Margin, $80 $ 30 per unit $ 4,800 $ 1200 $ 6,000
Fixed Costs 4,500
Operating Income $ 1,500
Required: What is the BEP (in units & in Birr
Required: Answer the following
1. What is the sales mix of videos and equipment sets
2. Compute weighted average contribution margin
3. Compute the break-even quantity of each product.
4. What is weighted average contribution margin ratio
5. What is the overall break-even sales revenue
