7. A thermometer reading 75°F is taken out where the temperature is 20 °F. The reading is 30 °F after four minutes. Find a) the thermometer reading 7 minutes after the thermometer was brought outside, and b) the time taken for the reading to drop from 75 °F to within a half degree of the air temperature or 20.5 °F. 8. A tank contains 200 liters of fresh water. Brine containing 2.5 N/liter of dissolved salt runs into the tank at the rate of 8 liters/min and the mixture kept uniform by stirring runs out at 4 liters/min. Find the amount of salt when the tank contains 240 liters of brine. The concentration of salt in the tank after 25 minutes amounts to how much?

Q: A gear reduction system consists of two gears: E and X. Gear E rotates clockwise with a constant…

A: Given data: αE=4.5 rad/s2ωE=7 rad/s Need to determine select the correct statement.

Q: Q1) Find the distance of resultant from point(a). 20N -3m 30N 4 30 15N

A:

Q: The following data were obtained during a tension test of a low carbon steel specimen having a gauge…

A: (a) Calculate the stress up to elastic limit. σe=PeA=Peπ4de2=35×103 Nπ40.0016 m2=1.74×1010 N/m2

Q: Draw the shear diagram for the beam. Follow the sign convention. (Figure 1) Click on "add vertical…

A:

Q: ease consider steam at 500 kPa and 300 C. Please determine a. a and g in kJ/kg. b. vR in ce/gm.

A:

Q: Q2\ The 120-N force is applied as shown to one end of the curved wrench. If a=30 calculate the…

A: Determine the moment about point O  Mo=Fcosα(OB)+Fsinα(AB) ...(1)Mo=41.53768 NmFor moment about O to…

Q: Tony Stark is having difficulty conducting some phase diagram calculations for his new Adamantium…

A: (1) it is an alloy of euctite form. (2) the phases present just above the eutectic temperature…

Q: A girl rolls a ball up an incline and allows it to re- turn to her. For the angle 8 and ball…

A: Write the given data. a=0.25gu=4 m/s

Q: 8.18 Two planes AB and BC in an elastic material under load are inclined at 45° to each other. The…

A:

Q: Air is flowing through a thick walled copper pipe that can be considered to be isothermal at 450…

A:

Q: The hand brake for a bicycle is shown. Portions DE and F G are free to rotate on bolt A which is…

A:

Q: 2A wall is constructed of 2.0 cm of copper, 3.0 mm of asbestos sheet [k = 0.166 W/m.°C], and 6.0 cm…

A:

Q: Table Q1(a) shows the experimental values for a PVC pipe with diameter of 0.505 m under tensile…

A:

Q: Q3: The uniform beam has a mass of 50 kg per meter of length. Determine the reaction the supports.…

A: GIVEN:

Q: Find the magnitude and direction with respect to heat engine of Qg and Qc for reversible cycle as…

A: from clausius theorem

Q: (ii) For the system shown in Figure 2, determine (i) the required value of a if resultant of three…

A: For the given system of forces  To determine  (a) value of α if resultant is in the vertical…

Q: Find the o of the air for 1 bar pressure, ø= 70% and DBT 30C and. Pressure of saturated steam is…

A: Given data as per question Pressure =1 bar Pvs =4.25 kpa DBT =300 C Calculations we know…

Q: Draw the F.B.D. for the beam shown in fig and then find the reactions at A * ? 2 kN 4 kN/m L--x A 3…

A: The given beam is a cantilever beam having a few loads on it. A is a fixed end. So, it will contain…

Q: The uniform 100-kg I-beam is supported initially by its end rollers on the horizontal surface at A…

A:

Q: 650 mm (2) 650 mm 870 mm 650 mm 55 kN B Try One (1) 800 mm X Bar properties 550 mm² 160 GPa 250 mm²…

A:

Q: 24. Change the following Miller indices: (210), (Ī 13), (011), (246) and (4 23) into Miller-Bravais…

A:

Q: 04: Calculate the forces induced in members KL, CL, and CB by the 20-ton load on the cantilever…

A:

Q: A rope made of biological materials has a length of 1.2 m and a diameter of 0.015 m. The resulting…

A:

Q: Q. 2 Find the position of centroid with respect to given X and Y axis of shaded portion in the…

A:

Q: Calculate the magnitude of the force supported by the pin at A under the action of the 1.5-kN load…

A: Given data: The magnitude of force applied to the bracket, P = 1.5 kN. Draw a free-body diagram of…

Q: P.1-11 200 b Resolve the force 4. into two components, Ą one along Ac and the other along CD 24

A: Dear student,                     According to the guidelines I am allowed to answer only one…

Q: 15 kip-ft Given are the following data in the figure. Determine what statement is correct if G is 12…

A:

Q: The answer should be 24,6kN when rounded up.

A:

Q: 3. A circular steel bar is subjected to an axial compressive load of 175 kN. The bar has a diameter…

A:

Q: #3 Calculate the x and y components of the reaction forces at points A, B, C, D, and E. External…

A: Giventruses as shown below

Q: Q3: You have a truss which is shown below, two forces applying on it in B and C joints, which are…

A:

Q: Q2: A force F with a magnitude of 100 N is applied at the origin O of the axes x-y-z as shown. The…

A:

Q: om the given figure shown below, determine the centroidal moment of Inertia (Ixo and lyo) of the…

A: From the figure, we can conclude that all the values are in inches.

Q: 6 KN Q3: Find the reactions for the following 3m 5 kN/m

A:

Q: In Fig.B, Determine the magnitude of the resultant force acting on the screw eye and its direction…

A: Let F1=60N, F2=40N and F3=30N Angles made by different forces along X axis and Y axis are given in…

Q: Link BD consists of a single bar 1 in. wide and in. thick. Each pin has a -in. diameter and P= 7…

A: GivenFor bar BDw=1int=12indp=38inP=7kipsWhenθ=90o

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.