At temperatures near absolute zero, Bc approaches 0.142 T for vanadium, a type-I superconductor. The normal phase of vanadium has a magnetic susceptibility close to zero. Consider a long, thin vanadium cylinder with its axis parallel to an external magnetic field B? 0 in the +x-direction. At points far from the ends of the cylinder, by symmetry, all the magnetic vectors are parallel to the x-axis.
Part B
What is the direction of the resultant magnetic field B? inside the cylinder for this case?
What is the direction of the resultant magnetic field inside the cylinder for this case?
| in the +x-direction |
| in the ?x-direction |
| perpendicular to the x-axis |
| the field is zero
Part C What is the magnitude of the resultant magnetic field B? outside the cylinder (far from the ends) for this case? |
Part E
What is the magnitude of the magnetization M? inside the cylinder for this case?
Part G
What is the magnitude of the magnetization M? outside (far from the ends) the cylinder for this case?
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In: Physics
Thirty-two small communities in Connecticut (population near 10,000 each) gave an average of x = 138.5 reported cases of larceny per year. Assume that σ is known to be 43.5 cases per year.
(a) Find a 90% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error? (Round your answers to one decimal place.)
| lower limit | |
| upper limit | |
| margin of error |
(b) Find a 95% confidence interval for the population mean annual
number of reported larceny cases in such communities. What is the
margin of error? (Round your answers to one decimal place.)
| lower limit | |
| upper limit | |
| margin of error |
(c) Find a 99% confidence interval for the population mean annual
number of reported larceny cases in such communities. What is the
margin of error? (Round your answers to one decimal place.)
| lower limit | |
| upper limit | |
| margin of error |
(d) Compare the margins of error for parts (a) through (c). As the
confidence levels increase, do the margins of error increase?
As the confidence level increases, the margin of error decreases.
As the confidence level increases, the margin of error increases.
As the confidence level increases, the margin of error remains the same.
(e) Compare the lengths of the confidence intervals for parts (a)
through (c). As the confidence levels increase, do the confidence
intervals increase in length?
As the confidence level increases, the confidence interval decreases in length
.As the confidence level increases, the confidence interval increases in length.
As the confidence level increases, the confidence interval remains the same length.
In: Statistics and Probability
ASAP due tonight!
|
Wally’s Widget Company (WWC) incorporated near the end of 2011. Operations began in January of 2012. WWC prepares adjusting entries and financial statements at the end of each month. Balances in the accounts at the end of January are as follows: |
| Cash | $ | 19,220 | Unearned Revenue (40 units) | $ | 4,550 | ||
| Accounts Receivable | $ | 10,250 | Accounts Payable (Jan Rent) | $ | 1,700 | ||
| Allowance for Doubtful Accounts | $ | (1,100) | Notes Payable | $ | 15,500 | ||
| Inventory (45 units) | $ | 3,600 | Contributed Capital | $ | 5,400 | ||
| Retained Earnings – Feb 1, 2012 | $ | 4,820 | |||||
| • | WWC establishes a policy that it will sell inventory at $175 per unit. |
| • | In January, WWC received a $4,550 advance for 40 units, as reflected in Unearned Revenue. |
| • | WWC’s February 1 inventory balance consisted of 45 units at a total cost of $3,600. |
| • | WWC’s note payable accrues interest at a 12% annual rate. |
| • | WWC will use the FIFO inventory method and record COGS on a perpetual basis. |
| February Transactions | |
| 02/01 |
Included in WWC’s February 1 Accounts Receivable balance is a $1,900 account due from Kit Kat, a WWC customer. Kit Kat is having cash flow problems and cannot pay its balance at this time. WWC arranges with Kit Kat to convert the $1,900 balance to a note, and Kit Kat signs a 6-month note, at 12% annual interest. The principal and all interest will be due and payable to WWC on August 1, 2012. |
| 02/02 |
WWC paid a $700 insurance premium covering the month of February. The amount paid is recorded directly as an expense. |
| 02/05 |
An additional 150 units of inventory are purchased on account by WWC for $9,000 – terms 2/15, n30. |
| 02/05 |
WWC paid Federal Express $600 to have the 150 units of inventory delivered overnight. Delivery occurred on 02/06. |
| 02/10 |
Sales of 120 units of inventory occurred during the period of 02/07 – 02/10. The sales terms are 2/10, net 30. |
| 02/15 |
The 40 units that were paid for in advance and recorded in January are delivered to the customer. |
| 02/15 |
25 units of the inventory that had been sold on 2/10 are returned to WWC. The units are not damaged and can be resold. Therefore, they are returned to inventory. Assume the units returned are from the 2/05 purchase. |
| 02/16 | WWC pays the first 2 weeks wages to the employees. The total paid is $2,600. |
| 02/17 |
Paid in full the amount owed for the 2/05 purchase of inventory. WWC records purchase discounts in the current period rather than as a reduction of inventory costs. |
| 02/18 | Wrote off a customer’s account in the amount of $1,200. |
| 02/19 |
$3,400 of rent for January and February was paid. Because all of the rent will soon expire, the February portion of the payment is charged directly to expense. |
| 02/19 |
Collected $8,400 of customers’ Accounts Receivable. Of the $8,400, the discount was taken by customers on $5,500 of account balances; therefore WWC received less than $8,400. |
| 02/26 |
WWC recovered $440 cash from the customer whose account had previously been written off (see 02/18). |
| 02/27 |
A $700 utility bill for February arrived. It is due on March 15 and will be paid then. |
| 02/28 | WWC declared and paid a $400 cash dividend. |
| Adjusting Entries: |
| 02/29 |
Record the $2,600 employee salary that is owed but will be paid March 1. |
| 02/29 |
WWC decides to use the aging method to estimate uncollectible accounts. WWC determines 8% of the ending balance is the appropriate end of February estimate of uncollectible accounts. |
| 02/29 | Record February interest expense accrued on the note payable. |
| 02/29 |
Record one month’s interest earned Kit Kat’s note (see 02/01). I need help making the journal entries! Help ASAP thank you! |
In: Accounting
In Assignment 2 you considered the following setting: Near-sightedness (myopia) afflicts roughly 10% of children at age 5.
Assume that the school has a total of 600 students.
Part A. In this school, what is the expected number of students to have myopia? What is the variance?
Part B. If we assume that the students in the school form an independent and random sample, then approximate the probability that at most 60 of the students in the 600 student school have myopia.
When calculating the approximate probability, please be sure to justify the approximation (i.e. check any conditions) and show all your work in the calculation.
Part C. If we assume that the students in the school form an independent and random sample, then what is the approximate probability that at least 55 and less than 65 of the students in the 600 student school have myopia? Again, show all necessary work in this calculation.
In: Statistics and Probability
Thirty-two small communities in Connecticut (population near 10,000 each) gave an average of x = 138.5 reported cases of larceny per year. Assume that σ is known to be 41.5 cases per year.
(a) Find a 90% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error? (Round your answers to one decimal place.)
| lower limit | |
| upper limit | |
| margin of error |
(b) Find a 95% confidence interval for the population mean annual
number of reported larceny cases in such communities. What is the
margin of error? (Round your answers to one decimal place.)
| lower limit | |
| upper limit | |
| margin of error |
(c) Find a 99% confidence interval for the population mean annual
number of reported larceny cases in such communities. What is the
margin of error? (Round your answers to one decimal place.)
| lower limit | |
| upper limit | |
| margin of error |
In: Statistics and Probability
Phoenix Industries has pulled off a miraculous recovery. Four years ago it was near bankruptcy. Today, it announced a $1.50 per share dividend to be paid a year from now, the first dividend since the crisis. Analysts expect dividends to increase by 50 percent a year for 3 years. Dividends are expected to grow at a rate of 20 percent for another 2 years. After the sixth year, dividend growth is expected to settle down to a more moderate long-term growth rate of 8 percent. If the firm’s investors expect to earn a return of 20 percent on this stock, what must be its price?
In: Finance
1-) Fairfield Homes is developing two parcels near Pigeon Fork, Tennessee. In order to test different advertising approaches, it uses different media to reach potential buyers. The mean annual family income for 12 people making inquiries at the first development is $153,000, with a standard deviation of $42,000. A corresponding sample of 24 people at the second development had a mean of $171,000, with a standard deviation of $30,000. Assume the population standard deviations are the same. At the 0.05 significance level, can Fairfield conclude that the population means are different?
State the decision rule for 0.05 significance level: H0: μ1 = μ2; H1:μ1 ≠ μ2. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.)
Reject H0 if t is not between ____________ and _____________.
b.Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.)
Value of the test statistic ____________
c. At the 0.05 significance level, can Fairfield conclude that the population means are different?
__________ (reject/ do not reject) Ho. Fairfield __________ (can/cannot) conclude that the population means are different.
In: Statistics and Probability
Historically, your company has calculated bad debts using an aging of accounts receivable. Near the end of the fiscal year, the company is in a cash crunch and needs to borrow money from the bank, using accounts receivable as collateral. The owner of the company knows that many of the accounts receivable are more than 90 days past due, resulting in net receivables equal to only 80% of total receivables.
Respond to the following in a minimum of 175 words:
In: Accounting
A 58 kg skier is skiing down a 25 degree hill which offers negligible friction. Near the top of the hill (x =0), her speed is relatively small and equal to 3.6 m/s, but 57 m further downhill (x>0), her speed has grown to 18.59 m/s. Draw a Free body diagram. (thank you)
a) Argue, based on some energy calculations of course, that there must be significant air resistance.
b) The air resistance is a variable force and changes quadratically with the distance according to fair(x) = Bx2 (the x-axis points downward along the incline). From this information and the knowledge of initial and final speeds, calculate the value of B.
In: Physics
PLEASE ANSWER THE QUESTIONS WITH EXPLANATION.
1 mm bug located at the near-point, 25 cm away from the left eye. Includes the distance between the retina and lens in your eye is 1 cm.
What focal length for your eye lens is needed to focus the bugs' image onto your retina?
If you insert a convex magnifying glass of 6 cm away from the bug, between the bug and your eye, How far away from the glass lens will the virtual image of the bug be located if the focal length of that glass lens is 7 cm?
In: Physics