1 of 20
Which of the following is the most accurate statement concerning charge?
| a | Charge is one of the seven fundamental dimensions found in nature. |
| b | Charge is a derived dimension (current • time), with SI units of Coulombs. |
| c | Charge is a derived dimension (current • time), with SI units of amperes. |
| d | Charge is a fundamental quantity found in all elementary particles such as protons, electrons, and neutrons. |
| e | The electrical force between two charges is directly proportional to the distance between the two charges. |
Question
2 of 20
Which of the following is the most accurate statement concerning electrical force?
| a | Electrical force is a derived dimension, with SI units of Newton/meter. |
| b | In most cases, the electrical force between two particles is roughly equivalent to the gravitational force between the particles, but opposite in direction. |
| c | Electrical force is one of the seven fundamental dimensions, with SI units of Newton. |
| d | Electrical force obeys the inverse square law. |
| e | Like the gravitational force, the electrical force is always attractive, never repulsive. |
Question
3 of 20
Which of the following is the most accurate statement concerning the first law of thermodynamics?
| a | The first law of thermodynamics describes the relationship between systems in thermal equilibrium. |
| b | The first law of thermodynamics describes the relationship between heat, work, and internal energy in a thermodynamic system. |
| c | The first law of thermodynamics describes the conservation of energy in an open thermodynamic system. |
| d | The first law of thermodynamics describes the conservation of energy in a closed thermodynamic system. |
| e | More than one of given statements are accurate. |
Question
4 of 20
What is the most accurate statement concerning the second law of thermodynamics?
| a | The Carnot cycle involves an isothermal expansion followed by an isobaric compression. The efficiency of this partial cycle is normally about 96%. |
| b | The second law of thermodynamics requires heat to flow spontaneously from a cooler object to a warmer object. This is the basis for a refrigerator. |
| c | A closed thermodynamic system absorbs heat at a high temperature and then converts the heat absorbed into useful work at a lower temperature. |
| d | An isothermal process requires the temperature and pressure in a closed thermodynamic system to remain constant. |
| e | No cyclic thermodynamic process can convert heat completely into mechanical work. |
Question
5 of 20
What is the most accurate statement concerning the relationship between entropy and the second law of thermodynamics?
| a | Entropy provides a quantitative measure of the disorder of a system. |
| b | Entropy is equal to the ratio of the heat added to a system and the absolute temperature of the system. |
| c | Like energy, entropy is required to be conserved in both reversible and irreversible thermodynamic processes. |
| d | More than one of these statements (a, b or c) are accurate. |
| e | None of the statements (a, b or c) is accurate. |
Question
6 of 20
If you run a Carnot heat engine in reverse, which of the following statements must be true?
| a | Heat enters the gas at the cold reservoir and goes out of the gas at the hot reservoir. |
| b | The amount of heat transferred at the hot reservoir is equal to the amount of heat transferred at the cold reservoir. |
| c | The engine is able to perform a net amount of useful work, such as pumping water from a well, during each cycle. |
| d | The engine can transfer heat from a cold object to a hot object. |
| e | More than one of the above statements are true. |
Question
7 of 20
What is the most accurate statement concerning Gauss's law?
| a | Gauss's law provides a quantitative relationship between the electric field established and the quantity of charge present when two point charges form a dipole. |
| b | Gauss's law provides a quantitative relationship between the scalar nature of electric force and the vector nature of electric flux. |
| c | Gauss's law provides a quantitative relationship between electric charge and the electric field associated with the electric charges enclosed on the surface of a three-dimensional object like a sphere. |
| d | Gauss's law uses superposition to estimate the scalar difference between lines of electric flux entering or leaving a closed two-dimensional surface. |
| e | More than one of the statements (a, b, c or d) are accurate. |
Question
8 of 20
If the electric field is "E" at a distance "d" from a point charge, its magnitude will be 2E at a distance______
| a | d/4. |
| b | d/2. |
| c | d/?2. |
| d | d ? 2. |
| e | 2d. |
Question
9 of 20
Two protons close to each other are released from rest and are completely free to move. After being released, which statement(s) is/are accurate?
| a | Their speeds gradually decrease to zero as they move apart. |
| b | Their speeds gradually increase as they move apart. |
| c | Their accelerations gradually increase as they move apart. |
| d | Their accelerations gradually decrease to zero as they move apart. |
| e | More than one of the statements (a, b, c or d) are accurate. |
In: Physics
YQR has a market value of $125 million and 5 million shares outstanding. HKG has a market value of $40 million and 2 million shares outstanding. YQR thinks of taking over HKG with a premium of $10 million. The combined firm will be worth $185 million. If YQR offers 2 million shares of its stock in exchange for the 2 million shares of HKG, what will the stock price of YQR be after the acquisition? What exchange ratio between the two stocks would make the value of a stock offer equivalent to a cash offer of $50 million?
In: Finance
YQR has a market value of $125 million and 5 million shares outstanding. HKG has a market value of $40 million and 2 million shares outstanding. YQR thinks of taking over HKG with a premium of $10 million. The combined firm will be worth $185 million. If YQR offers 1.2 million shares of its stock in exchange for the 2 million shares of HKG, what will the stock price of YQR be after the acquisition? What exchange ratio between the two stocks would make the value of a stock offer equivalent to a cash offer of $50 million?
In: Finance
The eruption height and the time interval after eruption of a geyser were measured and are shown below. Answer parts a-c.
|
Height (x) |
125 |
135 |
85 |
95 |
100 |
95 |
115 |
105 |
|
|
Interval after (y) |
58 |
62 |
40 |
45 |
47 |
48 |
57 |
50 |
a. Find the value of the linear correlation coefficient r.
b. Find the critical values of r from the table showing the critical values for the Pearson correlation coefficient using
alpha=0.05.
c. Is there sufficient evidence to conclude that there is a linear correlation between the two variables?
In: Statistics and Probability
Tiger Woods Enterprises manufactures two products (information follows). Fixed costs are $250,000; the tax rate is 35%.
PRODUCT SALES MIX SALES PRICE/UNIT VARIABLE COST/UNIT
Deceit Potion 2 $50 $25
Forgiveness Ointment 1 $40 $15
Calculate (A) the composite contribution margin per unit, (B) the break-even point in composite units, and (C) the amount of sales revenues in dollars if the company reports after-tax income of $550,000. Label your answers and round answers in units to the nearest unit.
In: Accounting
The cash flows for two projects, A and B, are shown in the table, below. Notice that Project A has a life of 5 years and Project B has a 3 year life. Calculate the NPV of each project and calculate which should be adopted using the replacement chain approach. Assume that the cost of capital is 10%.
|
Project CFs |
Project CFs |
|
|
Time |
A |
B |
|
0 |
-100 |
-150 |
|
1 |
20 |
75 |
|
2 |
25 |
60 |
|
3 |
30 |
50 |
|
4 |
30 |
|
|
5 |
40 |
|
|
NPV |
6.7097 |
5.3343 |
answer is -2.85
How to get this number?
In: Finance
Watt’s Lighting Stores made the following sales projection for
the next six months. All sales are credit sales.
| March | $44,000 | June | $48,000 | |
| April | 50,000 | July | 56,000 | |
| May | 39,000 | August | 58,000 | |
Sales in January and February were $47,000 and $46,000,
respectively. Experience has shown that of total sales, 5 percent
are uncollectible, 40 percent are collected in the month of sale,
50 percent are collected in the following month, and 5 percent are
collected two months after sale.
a. Prepare a monthly cash receipts schedule for
the firm for March through August.
In: Finance
a) A chemical manufacturer processes two chemicals, Arkon and Zenon, in varying proportions to produce three products, A, B, and C. He wishes to produce at least 150 units of A, 200 units of B, and 60 units of C. Each ton of Arkon yields 3 of A, 5 of B and 3 of C. Each ton of Zenon yields 5 of A, 5 of B and 1 of C.
i. If Arkon cost Ghc 40 per ton and Zenon Ghc 50 per ton, advise the manufacturer how to minimize cost.
ii. What is the dual of the minimizing LP problem?
In: Operations Management
The frequency distribution shows the average seasonal rainfall in California measured in inches
Please complete the chart (frequency and cumulative relative frequency) CRF to two decimal points
Rainfall Frequency Cumulative Relative Frequency
0 -9.99 2
10 – 19.99 25
20 - 29.99 0.88
30 -30.99 0.98
40 – 40.99 1.00
Total 50
I would like a clear understanding of where the values come from to complete this chart. I have seen a couple of answers that do not clearly explain how the missing values are generated (Formulas).
In: Math
A manufacturer of sprinkler systems used for fire protection in office buildings claims that the true average system-activation temperature is 130oF. A sample of n = 9 systems, when tested, yields a sample average activation temperature of 131.08oF. Suppose the distribution of activation temperature is normal with standard deviation 3.0 oF. Denote the true average system-activation temperature by µ ( oF). Consider testing H0 : µ = 130 versus Ha : µ 6= 130 at the significance level α = 0.05.
(a) (7 points) What is β(131)?
(b) (7 points) For this level 0.05 test, in order to control the Type II error probability at 0.01, that is to make β(131) ≤ 0.01, how many sprinkler systems should be used?
In: Statistics and Probability