Question 5.31 At steady state, a reversible refrigeration cycle discharges energy at the rate Ou to a hot reservoir at temperature Ty, while receiving energy at the rate Qc from a cold reservoir at temperature Tc. a. If Tk = 13°C and Tc=2°C, determine the coefficient of performance. b. If (x =10.5 kW, èc =8.75 kW, and Te = 0°C, determine Tv, in °C. c. If the coefficient of performance is 10 and TH = 27°C, determine T., in °C.

Determine the length \( L \) of \( D C \) so that the center of mass is at the bearing \( O \). Express your answer to three significant figures and include the appropriate units The pendulum in (Ejgure 1) consists of a 2-kg disk and slender rods \( A B \) and \( D C \) which have a mass per unit length of \( 2 \mathrm{~kg} / \mathrm{m} \). Assume \[ d=0.8 Determine the length L of DC so that the center of mass is at the bearing O. Express your answer to three significant figures and include the appropriate units The pendulum in (Ejgure 1) consists of a 2-kg disk and slender rods AB and DC which have a mass per unit length of 2 kg/m. Assume d=0.8 m.  2. Incorrect; Try Again; One attempt remaining Figure Part B What is the moment of inertia of this assembly about an axis perpendicular to the page and passing through point O ? Express your answer in kilograms multiplied by squared meter to three significant figures.

The drum of a washing machine has a 90 cm diameter driven pulley and a maximum rotation speed of 2000 rpm. If the driving pulley attached to the electric motor has a diameter of 9 cm A- Make a sketch of the washing machine and the pulley indicating the diameters, speeds. B- Is it a multiplier or reducer system? C- Calculate transmission ratio? D- What is the maximum turning speed of the driving pulley?

A family is relocating from St. Louis, Missouri, to California. Due to an increasing inventory of houses in St. Louis, it is taking longer than before to sell a house. The wife is concerned and wants to know when it is optimal to put their house on the market. Her realtor friend informs them that the last 26 houses that sold in their neighborhood took an average time of 75 days to sell. The realtor also tells them that based on her prior experience, the population standard deviation is 8 days. (You may find it useful to reference the z table.) a. What assumption regarding the population is necessary for making an interval estimate for the population mean? - Assume that the population has a normal distribution. - Assume that the central limit theorem applies. b. Construct the 90% confidence interval for the mean sale time for all homes in the neighborhood. Confidence interval - to

Motorbike A has mass 512 kg and is travelling at 16 m/s heading North. Motorbike B has mass 448 kg and is travelling in the direction N29°E at 27 m/s. If the two motorbikes collide and move off together, determine their speed in metres per second after the collision giving your answer to one decimal place.

Write a program to produce an array of integer random numbers. Yourprogram should find out from the user how many numbers to store. It should then generate and store that many random integers (the random numbers must be between 1 and 999 inclusive). The program should then determine the smallest number, the largest number, and the average of all the numbers stored in the array. Finally, it should print out all the numbers on the screen, five numbers to a line with spaces in between. Once the contents of the array have been printed to screen, display the smallest number, largest number, and average determined previously. You should ensure that your program design in modular.The Random class of Java library (java.util.Random) implements a randomnumber generator. To generate random numbers, you construct an object of q the class Random, and then use the method nextInt(n) which returns a number between 0 (inclusive) and n (exclusive). Eg:import java.util.Random;.....Random generator = new Random();.....//generate a random number between 0 and 99 (inclusive)int nextRand = generator.nextInt(100);Alternatively use Math.random(), which returns a random valuein the range 0.0 to 1.0 (then adjust to the correct range)

Assume that you measured the length of an object as 50 mm using a digital caliber. The measurement was made at 300 + 5 K. What is the actual measurement result? (Resolution of the digital caliber: 0.04 mm, coverage factor: 3, linear thermal expansion coefficients of the digital caliber and the sample are 14*10-6 KP)