Sometimes, even with a wrench, one cannot loosen a nut that is frozen tightly to a bolt. It is often possible to loosen the nut by slipping one end of a long pipe over the wrench handle and pushing at the other end of the pipe. With the aid of the pipe, does the applied force produce a smaller torque, a greater torque, or the same torque on the nut?

A modem constellation diagram similar to earlier Fig has data points at the following coordinates: (1, 1), (1, −1), (−1, 1), and (−1, −1). How many bps can a modem with these parameters achieve at 1200 symbols/second?

The volume of the rectangular solid is 1430 cubic centimeters. Find the dimensions of the solid.

How much energy in kilojoules is needed to heat 5.00 g of ice from -11.0 degree celcius to 30.0 degree celcius? The heat of fusion of water is 6.01 kJ/mol, and the molar heat capacity is 36.6 J/(K .mol) for ice and 75.4 J/(K.mol) for liquid water.

In groups, discuss how you think these hot and cold packs work. Where is the heat in the heat pack coming from? Why does the cold pack feel cold? Why can the heat pack at the top be renewed by plac ing it in boiling water? Summarize you ideas below:

The financial records of LeRoi Jones Inc. were destroyed by fire at the end of 2020. Fortunately, the controller had kept certain statistical data related to the income statement as follows.

1. The beginning merchandise inventory was $92,000 and decreased 20% during the current year.

2. Sales discounts amount to$17,000.

3. 20,000 shares of common stock were outstanding for the entire year.

4. Interest expense was $20,000.

5. The income tax rate is 30%.

6. Cost of goods sold amounts to$500,000.

7. Administrative expenses are 20% of cost of goods sold but only 8% of gross sales.

8. Four-fifths of the operating expenses relate to sales activities.

From the foregoing information prepare an income statement for the year 2020 in single-step form.

Is the set of real numbers closed under the operation of subtraction? Explain.

Explain how a $1 bill has all six characteristics of money.

Solve the preceding problem if the length $L=56\ \mathrm{in}$., the inner radius $r_{1}=1.25\ \mathrm{in.}$, the angle of twist is $0.5^{\circ}$, and the allowable shear strain is 0.0004 rad.

Indicate whether each expression represents the verbal expression negative seven times the quantity triple $\mathrm{m}$ minus eleven.

The molar heat of fusion of aluminum metal is $10.79 \mathrm{~kJ} / \mathrm{mol}$, whereas its heat of vaporization is $293.4 \mathrm{~kJ} / \mathrm{mol}$.
c. What quantity of heat would be evolved if $5.00 \mathrm{~g}$ of liquid aluminum freezes at its normal freezing point?

Apply: What images of comfort and guidance might a modem psalm writer use?

Classify each of the following types of lipids as (1) glycerol-based (2) sphingosine-based (3) steroid nucleus-based or (4) fatty acid-based.

a. Fats

b. Cholesterol

c. Eicosanoids

d. Leukotrienes

Hot water at $80^{\circ} \mathrm{C}$ is used to heat air from $7^{\circ} \mathrm{C}$ to $40^{\circ} \mathrm{C}$ in a finned-tube cross-flow heat exchanger. The water exit temperature is $52^{\circ} \mathrm{C}$. Determine the effectiveness of this heat exchanger.