A large refrigeration plant is to be maintained at $-15^{\circ} \mathrm{C},$ and it requires refrigeration at a rate of 100 kW. The condenser of the plant is to be cooled by liquid water, which experiences a temperature rise of $8^{\circ} \mathrm{C}$ as it flows over the coils of the condenser. Assuming the plant operates on the ideal vapor-compression cycle using refrigerant-134a between the pressure limits of 120 and 700 kPa, determine (a) the mass flow rate of the refrigerant, (b ) the power input to the compressor, and (c) the mass flow rate of the cooling water.

PhotoTech, Inc., a manufacturer of rechargeable batteries for digital cameras, signed a contract with a digital photography company to produce three models of lithium-ion battery packs for a new line of digital cameras. The contract calls for the following:

$$\begin{array}{cc} \text { Battery Pack } & \text { Production Quantity } \\ \text { PT-100 } & 200,000 \\ \text { PT-200 } & 100,000 \\ \text { PT-300 } & 150,000 \end{array}$$

PhotoTech can manufacture the battery packs at manufacturing plants located in the Philippines and Mexico. The unit cost of the battery packs differs at the two plants because of differences in production equipment and wage rates. The unit costs for each battery pack at each manufacturing plant are as follows:

$$\begin{array}{ccc} \text { Product } & \text { Philippines } & \text { Mexico } \\ \text { PT-100 } & \$ 0.95 & \$ 0.98 \\ \text { PT-200 } & \$ 0.98 & \$ 1.06 \\ \text { PT-300 } & \$ 1.34 & \$ 1.15 \end{array}$$

The PT-100 and PT-200 battery packs are produced using similar production equipment available at both plants. However, each plant has a limited capacity for the total number of PT-100 and PT-200 battery packs produced. The combined PT-100 and PT-200 production capacities are 175,000 units at the Philippines plant and 160,000 units at the Mexico plant. The PT-300 production capacities are 75,000 units at the Philippines plant and 100,000 units at the Mexico plant. The cost of shipping from the Philippines plant is $0.18 per unit, and the cost of shipping from the Mexico plant is$0.10 per unit.

a. Develop a linear program that PhotoTech can use to determine how many units of each battery pack to produce at each plant to minimize the total production and shipping cost associated with the new contract.

A multicellular plant called a primrose. List three conclusions you can make about the primrose as a living thing.

Which geological process is often caused by the growth of plant roots? A. deposition B. erosion C. sorting D. weathering

Consider a steam power plant that operates on the ideal reheat Rankine cycle. The plant maintains the inlet of the high-pressure turbine at $600\ \mathrm{psia}$ and $600^{\circ} \mathrm{F}$, the inlet of the low-pressure turbine at $200\ \mathrm{psia}$ and $600^{\circ} \mathrm{F}$, and the condenser at $10\ \mathrm{psia}$. The net power produced by this plant is $5000 \mathrm{~kW}$. Is there any advantage to operating the reheat section of the boiler at $100\ \mathrm{psia}$ rather than $200$ psia while maintaining the same low-pressure turbine inlet temperature?

In a steam power plant $1000 \mathrm{Btu} / \mathrm{s}$ is added at $1200 \mathrm{~F}$ in the boiler, $580 \mathrm{Btu} / \mathrm{s}$ is taken out at $100 \mathrm{~F}$ in the condenser, and the pump work is $20 \mathrm{Btu} / \mathrm{s}$. Consider the steam power plant and show that this cycle satisfies the inequality of Clausius.

A farmer has three hundred acres of arable land on which she wants to plant cauliflower and cabbage. The farmer has $\$ 17,500$ available for planting and $\$ 12,000$ for fertilizer. Planting 1 acre of cauliflower costs $\$ 70$, and planting 1 acre of cabbage costs $\$ 35$. Fertilizer costs $\$ 25$ for 1 acre of cauliflower and $\$ 55$ for 1 acre of cabbage.

(a) Find a system of inequalities that describes the number of acres of each crop that the farmer can plant with the available resources. Graph the feasible region.

(b) Can the farmer plant one hundred fifty-five acres of cauliflower and one hundred fifteen acres of cabbage?

(c) Can the farmer plant one hundred fifteen acres of cauliflower and one hundred seventy-five acres of cabbage?

You are handed a mystery pea plant with tall stems and axial flowers and asked to determine its genotype as quickly as possible. You know that the allele for tall stems (7) is dominant to that for dwarf stems (t) and that the allele for axial flowers (A) is dominant to that for terminal flowers (a). Identify ALL the possible genotypes for your mystery plant.

The part of a plant embryo that feeds the growing seedling is the A. seed coat. B. primary root. C. endosperm. D. cotyledon.

The following questions are unrelated except that they all apply to plant assets and intangible assets:

1. The manager of Wallace Manufacturing regularly buys plant assets and debits the cost to Repairs and Maintenance Expenses. Why would she do that, since she knows this action violates GAAP?
2. The manager of Arbor Homes debits the cost of repairs and maintenance of plant assets to Plant and Equipment. Why would he do that, since he knows he is violating GAAP?
3. It has been suggested that because many intangible assets have no value except to the company that owns them, they should be valued at $1.00 or zero on the balance sheet. Many accountants disagree with this view. Which view do you support? Why?

The height of a plant is measured once a month and its growth is charted. The first month the height is recorded as $6.0 \mathrm{~cm}$, and the height increases by $12 \%$ per month for a year. Find a recursive formula for the height $h_n$ of the plant in the $n$th month, and use the formula to generate the first ten terms of the sequence $h_n$.

What does a plant need that makes it necessary for seed germination to start with the emergence of a root rather than a shoot?

What are two ways of reducing the negative aspects associated with using absorption costing to evaluate the performance of a plant manager?

A pea plant that is a dwarf with green, wrinkled seeds was crossed to a true-breeding plant that is tall with yellow, round seeds. The $\mathrm{F}_1$ generation was allowed to self-fertilize. What types of gametes, and in what proportions, would the $\mathrm{F}_1$ generation make? What would be the ratios of genotypes and phenotypes of the $\mathrm{F}_2$ generation?