A 140-mH inductor and a 4.80-Ω resistor are connected with a switch to a 6.00-V battery as shown in the figure above.

(a) After the switch is first thrown to a (connecting the battery), what time interval elapses before the current reaches 220 mA?
ms

(b) What is the current in the inductor 10.0 s after the switch is closed?
A

(c) Now the switch is quickly thrown from a to b. What time interval elapses before the current in the inductor falls to 160 mA?
ms

When a sound wave travels directly toward a hard wall, the incoming and reflected waves can combine to produce a standing wave. There is an antinode right at the wall, just as at the end of a closed tube, so the sound near the wall is loud. You are standing beside a brick wall listening to a 80Hz tone from a distant loudspeaker.

How far from the wall must you move to find the first quiet spot? Assume a sound speed of 340 m/s.

On March 1, the price of a commodity is $1,000, and the December futures price is $1,015. On November 1, the price is $980, and the December futures price is $981. A producer of the commodity entered into a December futures contracts on March 1 to hedge the sale of the commodity on November 1. The producer closed out its position on November 1. The effective price realized is therefore ___________. $1015-$981 or $34 $981+15 or $996 $1015 -1000 or $15 $980+15 or $995 $981+$34 or $1015 $980+$34 or $1014

On 12/31/24, the Cheboygan Company paid $4,000 of prepaid insurance and expensed the entire amount. The policy covered the period 1/1/25 to 12/31/29.

The error was discovered on 1/10/28; the 2027 books are closed. The correcting journal entry will include what entry to 1/1/28 Retained Earnings?

Select one:

a. $1,600 debit

b. $2,400 debit

c. $2,400 credit

d. No journal entry needed

e. $1,600 credit

Match each of the following transactions to the journal in which it would be entered.

1. Due to the recent reduction in corporate income tax rates, we can expect investment spending to _____ and the equilibrium interest rate to ____, all else the same.

2.People become less confident in the state of the economy. This is likely to cause national saving to _____ and the equilibrium interest rate to _______.

3. When households experience an increase in wealth they will tend to ___ private saving and ____ consumption spending.

4. When the federal government increases the budget deficit, this causes national saving to ____ and the equilibrium interest rate to ____ in a closed economy.

Due October 25. Let R denote the set of complex numbers of the form a + b √ 3i, with a, b ∈ Z. Define N : R → Z≥0, by N(a + b √ 3i) = a 2 + 3b 2 . Prove: (i) R is closed under addition and multiplication. Conclude R is a ring and also an integral domain. (ii) Prove N(xy) = N(x)N(y), for all x, y ∈ R. (ii) Prove that 1, −1 are the only units in R.

The reported net incomes for the first 2 years of Sandhill Co. were as follows: 2017, $169,000; 2018, $225,000. Early in 2019, the following errors were discovered. 1. Depreciation of equipment for 2017 was overstated by $7,900. 2. Depreciation of equipment for 2018 was understated by $15,400. 3. December 31, 2017 ending inventory was overstated by $20,300. 4. December 31, 2018 inventory was overstated by $28,300.

Prepare the correcting entry necessary when these errors are discovered. Assume that the books are closed.

A channel of distribution is the part of the supply chain that focuses on getting the product to the ultimate consumers. Over the past 10 years, retailers have seen a shift from brick and mortar to online buying of goods by consumers. As a result, more than 7000 retailers have closed up physical shop this year. Please are some advantages and disadvantage of online versus on ground shopping. If you are hired to slow and increase the number of on ground stores, what would be your strategy from a marketing and distribution strategy?