A refrigeration system with a flash chamber operates with R134a between the pressure limits of 1.0 and 0.1 MPa. The refrigerant leaves the condenser as saturated liquid and is throttled to a flash chamber operating at 0.4 MPa. The refrigerant leaving the low-pressure compressor at 0.4 MPa is also routed to the flash chamber. The vapor in the flash chamber is then compressed to the condenser pressure by the high-pressure compressor, and the liquid is throttled to the evaporator pressure. Assume the refrigerant leaves the evaporator as saturated vapor and compressors are isentropic. (The pressures are absolute pressures)
In: Mechanical Engineering
Find the pH of a solution prepared from 1.0 L of a 0.20 M solution of Ba(OH)2 and excess Zn(OH)2(s). The Ksp of Zn(OH)2 is 3×10−15 and the Kf of Zn(OH)42− is 2×1015.
In: Chemistry
A 10.0 mg sample of a nonvolatile organic compound is dissolved in 1.0 g of camphor, resulting in a depression of the freezing point of 1.33 K.
(You will be required to look some things up for this problem.)
Calculate the molar mass of the organic solute.
Calculate the vapor pressure of camphor over the solution.
In: Chemistry
A coil of inductance 120 mH and unknown resistance and a 1.0 μF capacitor are connected in series with an alternating emf of frequency 950 Hz. If the phase constant between the applied voltage and the current is 78°, what is the resistance of the coil?
In: Physics
A 5 kg pully has a string round around it and a force of 1.0 N pulls down on the string. The pully is frictionless, 10 cm in radius, and is a uniform disk. The pully is initially at rest.
A) What is the torque of the pully?
B) What is the angular acceleration of the pully?
C) How many times will the pully rotate in 3.0 seconds?
D) What will the pully's angular velocity be after 3.0 seconds?
In: Physics
a 1.0 kg ball and a 2.0 kg ball are connected by a rigid massless rod. The rod and balls are rotating clockwise about their center of gravity at 20 rpm. What torque will bring the balls to a halt in 5 seconds?
The correct answer is -0.28 N.m. I can't figure out how to get this answer. Please do not answer this question with an incorrect answer as it will be a waste of both our times.
In: Physics
Which of the following is NOT an assumption of the traditional economic order quantity (EOQ) model?
a. Holding and ordering costs are stable and known.
b. Demand is constant and known.
c. Supply lead time is constant and known.
d. Quantity discounts are possible.
Kim’s Nail Salon uses a weighted moving average method to forecast demand. She assigns a weight of 5 to the previous month’s demand, 3 to demand two months ago, and 2 to demand three months ago. If demand was 800 customers in April, 900 customers in May, 1,200 customers in June, and 2,000 customers in July, what should her forecast for August be?
a. 1,540
b. 910
c. 1,400
d. 1,210
Statewide Insurers receives 600 applications per month. Currently, there are 60 applications in the Reception area and 140 applications with the Underwriting team. How long does Receiving take to process an application? Assume that there are 20 working days per month.
a. 2 days
b. 3 days
c. 7 days
d. 10 days
Based on experience, the manager at the Giraffe Hotel decides to accept a reservation for a party of 12 guests knowing that his hotel is sold out. He is accepting the reservation because:
a. he can cancel the reservations of the 12 lowest-paying guests and get more revenue from the new guests
b. he can make arrangements with the neighboring hotel to accept the 12 guests
c. he is using overbooking techniques and has determined that he can safely accept the 12 guests
d. he knows he will have 6 cancellations and 6 no-shows among the current reservations
A manufacturing firm finds a location using the center of gravity method but rejects that location because they are unable to efficiently transport the finished goods to market. The firm’s action illustrates the link between __________ and location.
a. proximity
b. clustering
c. infrastructure
d. globalization
In: Other
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1. A 335-room hotel property recorded in 2004 a 66.6% occupancy and an ADR of $117.98. What is the property’s franchise fee (1) on a per available room basis and (2) as a percentage of rooms revenue if the agreement required the hotel to pay a reservation fee of $7.65 per available room per month; a royalty fee of 5% of rooms revenue; an advertising fee of 2.3% of rooms revenue; and a frequent traveler program fee of $5.00 per occupied room. The hotel had frequent stay guests totaling 6% of the occupied rooms. The initial fee is a minimum of $45,000 plus $300 per room for each room over 150. Please calculate annual room revenue (round to a whole number) $ ___ 2. Please use the information from Question 1 to calculate the Royalty Fee. Royalty fee (round to a whole number) $ ___ 3.Please use the information from Question 1 to calculate the Reservation Fee. Reservation fee (round to a whole number) $ ___
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In: Accounting
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In: Accounting
In C++
All guests in ABC Hotel are either Elite members (meaning they get a free breakfast) or Standard members (meaning they do not get a free breakfast). They collect points for every stay-Elite members earn 100 points for every day stayed in the hotel (so 2 days would be 200 points) and Standard member earns 50 points for every stay (so 3 days would be 140 points). Once 1000 points are reached, guests get a free stay. Guest details are kept in a file:
Sample input file1: Augustus, E-300,200, eggs//customer name, Membership level (E means elite), item ordered, ID number, points, breakfast choice
Sample input file2: Cyrus, S-100,30,x//customer name, Membership level(S means standard), item ordered, ID number, points, breakfast choice
1.The program should read in the number of points to get a free stay (1000) from the command line. It should continuously read in files of guests until the exit is entered (meaning the user can keep typing in file names-note that you can type in the same file name to open a previous guest).
2.Every time a file is opened, the program should ask how many days the guest is staying and award the appropriate number of points based on the membership level. The new point total should be saved in the file. If they are an elite member, they have the chance to change their breakfast choice.
3.When exiting, a file should be output with the number of guests that got a free stay (meaning their total points were 1000 or greater)
Sample output file:
Augustus had a free stay.
Jane had a free stay.
4.You should make a Hotel class and an abstract Person class. You should also make additional classes as necessary.
In: Computer Science