A grocery store sells 5-lb bags of mangoes. You purchase four bags over the course of a month and weigh the mangoes each time. You obtain the following measurement: Week 1 weight: 4.8 lb Week 2 weigh: 5.3 lb Week 3 weigh: 4.9 lb Week 4 weigh: 5.4 lb Does the measurement have random error? Does the measurement have systematic error?

A grocery store sells 5-lb bags of mangoes. You purchase four bags over the course of a month and weigh the mangoes each time. You obtain the following measurement: Week 1 weight: 4.8 lb Week 2 weigh: 5.3 lb Week 3 weigh: 4.9 lb Week 4 weigh: 5.4 lb Does the measurement have random error? Does the measurement have systematic error?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.22P: 1.22 In order to prevent frostbite to skiers on chair lifts, the weather report at most ski areas...

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Q1. Honey is a very widely used ingredient in cooking all around the world. Many commercial honey manufacturers heat treat honey to remove harmful bacteria that may be present. The density and viscosity of the honey varies with temperature, as shown in table 1. Temperature K 293 298 303 308 313 318 323 Density kg/m³ 1403 1398 1393 1388 1383 1378 1373 Viscosity Pas 55.66 46.45 37.99 30.28 23.32 17.11 11.65 Table 1: Fluid properties of honey. A particular processing facility heats and sterilises 500 kg of unprocessed honey every 30 minutes. The unpro- cessed honey is stored in large vats, then pumped though pipes into heating units before being pumped through another pipe to be bottled. The pipe carrying the honey from a storage container, which is 11 m tall, to a heating unit is 5 m long and has a diameter of 10 cm. Prior to being heated the honey is kept at 25°C. (a) What is the pressure difference between the top and bottom of a storage vat when it is full? (b) What is the volume flow…
You have the six pieces of metal listed below plus a beaker of water containing 400. g of water. The water temperature is 21.0 °C. Metals Specific Heat (J/g. K) Mass (g) 1. Al 0.9002 100. 2. Al 3. Au 4. Au 5. Zn 6. Zn 0.9002 0.1289 0.1289 0.3860 0.3860 50. 100. 50. 100. 50. The specific heat capacity of water is 4.184 J/g °C.
If 5.6 m³ of oil weighs 46800 N, what is the mass density in kg/m3. Select one: 851.9 8357.1 860.9 8457.1
Christopher investigated force and mass by exerting the same force on three different objects. He recorded his observations in a table. Distance moved (centimeters) Object Mass (grams) Trial 1 Trial 2 1 45 86 83 65 63 61 3 85 35 39 What can Christopher do so that object 3 moves about the same distance as object 1? O A. Perform more trials on all three objects. O B. Increase the force exerted on object 3. C. Perform more trials on object 3 only. D. Increase the force exerted on object 1.
1-F X b Answered: Detern X 3 Google day X 7 Google anxi X 7 https://moodle.nct.edu.om/mod/quiz/attempt.php?attempt=827752&cmid=98802&page=2 earning Portal Courses Reports - e-Services Academic Departments - ETC - CIMS- A brass specimen is subjected to a Tensile test in a laboratory. The following data obtained are: Length of Specimen = 335 mm; Diameter of Specimen = 15 mm; Yield Stress = 1326 MPa; Ultimate Stress = 2496 N/mm²; Solution: The Elongation at 29 kN (in mm) = Load at Yielding (in N)= Fracture Stress = 1763 MPa; % of Elongation = 48 % % of Reduction in area = 37 %. Determine the elongation at 29 kN, Load at yielding, Maximum load, Load at fracture, Final Length & Final diameter. Take Young's Modulus as 106 GPa. Maximum Load (in N)= Fracture Load (in N)= Google dazji X Final Length (in mm)= Final Area (in mm²) = Final Diameter (in mm) = Outcome 1_Classi X Diap O
Complete using the appropriate gravitational constants from the table that follows. In each exercise you may ignore wind resistance. g in m/sec2 g in ft/sec2 Earth 9.8 32 Moon 1.6 5.2 Mars 3.7 12.1 Jupiter 24.8 81 There is considerable controversy surrounding who hitthe longest home run in professional baseball. However,any ball that travels 500 feet in the air is considered “monumental.”Assuming that a hitter contacts a ball 4 feetfrom the ground and that the ball leaves the bat with a 45◦angle of elevation and subsequently travels a horizontaldistance of 500 feet, answer the following questions:(a) How fast is the speed of the ball right after contact?(b) What is the maximum height reached by the ball?(c) How long does the ball spend in the air after beinghit?(d) On May 22, 1963, Mickey Mantle, playing for theNew York Yankees, hit a home run that struck a point on the fac¸ade of the right-field roof of the old YankeeStadium approximately 115 feet high and 370 feetfrom…
Dr. Brown has built a 94 cm pendulum and pulled the pendulum 25° from vertical and then measured the period of 30 consecutive swings. The data is shown below. How do you interpret the uncertainties involved in this data? Period of Dr. Brown's pendulum Period of swing (s) 1.98 1.978 1.976 1.974 1.972 1.97 1.968 1.966 1.964 0 10 20 Number of swings since release 30 O Some random effect lowers the period of the pendulum by about 0.01 s in between the first and last data point. O The random uncertainty starts large (approximately 0.03 s) but decreases quickly until it is immeasureably small by the end of the data set. O Some systematic effect lowers the period of the pendulum by about 0.01 s in between the first and last data point. O The systematic uncertainty starts large (approximately 0.01 s) but decreases quickly until it immeasurably small by the end of the data set.
1.22 In order to prevent frostbite to skiers on chair lifts, the weather report at most ski areas gives both an air temperature and the wind-chill temperature. The air temperature is measured with a thermometer that is not affected by the wind. However, the rate of heat loss from the skier increases with wind velocity, and the wind-chill temperature is the temperature that would result in the same rate of heat loss in still air as occurs at the measured air temperature with the existing wind. Suppose that the inner temperature of a 3-mm-thick layer of skin with a thermal conductivity of 0.35 W/m K is and the air temperature is . Under calm ambient conditions the heat transfer coefficient at the outer skin surface is about (see Table 1.4), but in a 40-mph wind it increases to . (a) If frostbite occurs when the skin temperature drops to about , do you advise the skier to wear a face mask? (b) What is the skin temperature drop due to the wind?
II Question 2 A process instrument reading Z (volts) is thought to be related to a process stream flow rate V (L/s) and pressure P (kPa) by the expression: Z = aVÞp°. Using the three data points shown in the table above, calculate the constants a, b and c and indicate their units. In this particular case there is no regression to be performed, but only 3 equations in 3 unknowns to solve. 1 1.02 V (L/s) P (kPa) z (volts) 1.20 1.75 11.2 10.2 9.1 2.58 3.72 3.50 ere to search 12
Exercise 1 2.1 The following data were recorded during a tensile test of a 14.0-mm-diameter mild steel rod. The gage length was 50.0 mm. Load (N) Elongation (mm) Load (N) Elongation (mm) 46200 1.25 6310 0.010 52400 2.50 12600 0.020 58 500 4.50 18800 0.030 65400 7.50 25100 0.040 69000 12.50 31 300 0.050 67800 15.50 37900 0.060 65000 20.00 40100 0.163 61 500 Fracture 41600 0.433 Plot the stress-strain diagram and determine the following mechanical properties: (a) proportional limit; (b) modulus of elasticity; (e) yield stress; (d) ultimate stress; and (e) nominal rupture stress.
a) An aircraft's instruments measure an air temperature of -10° C and an air pressure of 90 kPa. What is the air density for these conditions? b) What are the pressure and density altitudes of the aircraft? Use the following portion of the standard atmosphere tables. Altitude (m) 75 150 250 300 450 600 750 900 1000 1200 Pressure (KPa) 101.3 100.4 99.5 98.5 97.7 95.9 94.1 92.4 90.8 89.1 87.5 Density (kg/m³) 1.2250 1.2162 1.2075|| 1.1959| 1.1901| 1.1730| 1.1560|| 1.1392 1.1226| 1.1116| 1.0900
A cold storage locker plant shows that each locker should be large enough to store about 300 lbs. of meat or measure about 20 in. by 20 in. by 3 ft. deep. For this size of plant, it is found that a single story building 45 ft by 60 ft. will be required to house lockers, refrigeration machinery, preparation room and office. The building will have about 30,000 cu. ft. Determine the first cost with the following data: Number of lockers 50 Cost of building P5.00 per cu. ft P1,000 each P2,000 per locker Lockers and insulation Refrigeration machinery and other | equipment Land (35 m x 50 m) Working Capital P35,000 P20,000