Use Newton's Law of cooling to determine the k value in air temperature of 40 degC. If 30 mins ago the boy was 120 degC and 10 mins age it was 80 degC. Select the correct response: 0.0321 -0.321 0.0235 -0.0235 none of the choices
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- Learning Goal: To use fundamental geometric and statics methods to determine the state of plane stress at the point on an element of material that is rotated clockwise through an angle from the in- plane stress representation of the point. The state of in-plane stress at a point on an element of material is shown. Let o, the same point that is rotated through an angle of 0-35 45.0 ksi, o, 19.0 ksi, and Ty 12.0 kai. Use this information to represent the state of stress ofThe left side of this equation tells how much energy Q the cylinder gives to the water while it cools. The right side of this equation tells how much energy Q the water and aluminum cup absorb from the cylinder to warm up. Because it is the same energy, they are equal. What is known in this equation? Mcyl 411.7 g, malum 46.5 g, malum+water = 175 g Can you find: mwater =? g Twater = Talum = 20°C (water and cup of room temperature) 90°C, T; = 35°C (hot cylinder and cool "cylinder+cup+water" temperatures) Tcyl kCal Calum = 0.22, Cwater 1 (specific heat of water and aluminum, measured in units kg-°C What are we looking for is Ccul - How we find it? Plug all the numbers into the equation (1), Ccul will be one unknown which you can calculate from the equation. Important, convert all the masses from grams to kilograms! After you find Ccyl, compare it to known value for the copper 0.093(our cylinder is made out of copper). |Ceyl -0.093| % : · 100% 0.093Task 3-a: If you have four instruments used to measure a temperature of 50.02 C inside the factory. However, the instruments gave different readings for different trials as follows: Instrument 1 20 30 40 50 60 70 80 51 49 Instrument 2 49 49 49 49 49 49 49 49 49 Instrument 3 48.01 48.03 49.02 49.01 50.00 48.02 47.09 47.05 47.80 Instrument 4 17.01 17.02 17.09 17.03 17.01 17.03 15.09 19.02 17.00 1. Define the resolution of an instrument. 2. Define the sensitivity of an instrument, then explain how the sensitivity of an instrument can be calculated. 3. Define the accuracy of an instrument system and explain using your own words how the accuracies of different instruments are compared. 4. Define the precision of an instrument system and explain using your own words how the precisions for different instruments are compared.
- Q3: Consider evaluation of different temperatures of solar photovoltaic/thermal system (PVT) as shown in Figure 1(a). The following set of differential equations represent energy balance equations to be solve using matrices and eigenvalues using MATLAB: dTglass = -0.75Tgtass + 0.75TpvT (1) dt - 1.187glass – 22Tpyr + 23Twax (2) dt dTwax 12Tglass + 18TpyT – 19 Twax (3) dt Where, Tgtass , TPVT, and Twax, are temperatures illustrated in Figure 1(b). At time t-0 the initial conditions are Tglass = 35 , Tpyr = 33, and Twax = 31 °C. Cold suppty In frem water Tank Glass PVT Espann Nane-PCMPVT Collector Wax Tubes Sterg Tank Nanofluid Heat Exchanger Contalner Tepe Teek oe Pump for drainShow the COMPLETE SOLUTIONS including the derivation of formula and interpolations/extrapolations:NO Calculator Technique and Applications. 2. Steam at a pressure of 2.5 MPa is known to have a specific volume of 39.7x10-3 kg What is it specific enthalpy? 3. Your steam has a Data of 5.25 MPa and 395 C. Find v, u, h and s. 4. Your steam has a data of 4300 KPag and 362 °C, Find v, u, h and s.Q8): To find how much heat is required to bring a kettle of water to its boiling point, you are asked to calculate the specific heat of water at 61°C. The specific heat of water is given as a function of time in Table below. Temperature, T Specific heat, C₂ (°C) J kg-°C 22 42 52 82 100 4181 4179 4186 4199 4217 Determine the value of the specific heat at 7=61°C using the direct T method of interpolation and a third order polynomial. Find the absolute relative approximate error for the third order polynomial approximation (Lagrange Method).
- 23 Q5. Whate is thc exact reading for the following in mm -10 1. Reading= TTTTE 4.30 012343 -20 10 2.75 2. Reading= TTE 012 20 20 -15 3. Reading=. -10 MITT 5 0123E 3.85 USFQI\ A 190'F bottle of milk left in 60'F room. At time initially the milk is cooling at 4 F per minute. Write an initial value problem (differential equation with initial condition ) and what is the temperature of bottle of milk after 1 hour? How long does it take for milk to cool to 100-F?A body at a temperature of 50 deg. Fis placed outdoors where the temperature is 100 deg. F. If after 5 minutes the temperature of the body is 60 deg. F, find the temperature of the body after 30 minutes. Select the correct response: 79.5 deg. F None O 83.77 deg. F 87.04 deg. F
- QUESTION 4 Solve the following differential equation in Matlab using ode45.m. Use time interval of 0.1 second. (Don't use options in ode45 to change teh tolerance.) do (t) dt - cos = sint 0(0)=0. What is e(t=4.1)? ○ 0.871 -0.212 1.44 1.28 2.01 3.19A block whose dimensions are 8in x 9in x 16in weighs 11lb under the water. It is located 20 in below the surface of the water. Its weight in air should be Select the correct response: O 21.82 kg O 34.32 kg 48.00 kg O 25.56 kgThe below shown graph is drawn from the tabulated values of steel which we measured during the experiment of thermal conductivity: (Consider the value of heater power (Q') and the area of cross section (A) of the material from the tabulated values) X-axis 1 unit = 1 cm y-axis 1 unit = 10°C 80- 70- 60- 50- 40- 30- 20- 10- 6. Distance X in cm 4. 5. 8. 10 Temperature T degree Celsius