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Water at a flow rate of $\dot{m}$ = 0.215 kg/s is cooled from 70°C to 30°C by passing it through a thin-walled tube of diameter D = 50 mm and maintaining a coolant at $T_\infty$ = 15°C in cross flow over the tube. (a) Determine the convection heat transfer coefficient for the water passing through the tube. [10 points] (b) What is the required tube length if the coolant is air and its velocity is V = 20 m/s? [8.0 points] (c) What is the required tube length if the coolant is water and its velocity is V = 2 m/s? [7.5 points] (d) Comment on your results and state whether you anticipated these results. [1.0 point] Air V = 20 m/s D = 0.05 m Water $T_{m,i}$ = 70 °C $\dot{m}$ = 0.215 kg/s Water V = 2 m/s $T_\infty$ = 15 °C $T_{m,o}$ = 30 °C L

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Millions of years ago (mya) The beautiful little plant is Lycopodium lagopus. The light green stalks rising up from the darker green bodies are flower stalks sporophyte offspring seed cones the gametophyte worts Previous Page Next Page Page 5 of 30

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143.3mL of a 0.284M hydrocyanic acid (Ka=6.2 x 10-10) solution is titrated by 0.729M potassium hydroxide. a. what is the initial pH b. what is the pH after adding 18.6mL titrant? c. what is the volume to the mid point? d. what is the pH at the midpoint? e. what is the pH after adding 35.7mL titrant? f. what is the volume to the equivalence point? g. what is the pH at the equivalence point?

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9 10 points If you drink too much, then you will certainly have a hangover and headache in the morning. Categorical Definition Cause/Consequence Resemblance Evaluation Proposal

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Explain the theoretical framework behind the design and optimization of blade profiles in axial flow turbines, considering aerodynamic efficiency and structural integrity under varying operating conditions.

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Before Marissa administers eye drops to her grandmother, where will she ask her to look? Look up at the ceiling. Look to the side. Look at the floor. Look at the tip of the eye drop bottle.

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4. A projectile is fired at an angle from the top of a cliff as shown in the diagram below. A graph is created of the projectile's vertical motion while it is in the air and is shown here. a. (2) Use the graph to calculate the height, h, of the cliff. 80205 meters? b. (2) The horizontal range of the projectile was 270m. On the graph above, draw a dashed line that represents the horizontal motion of the projectile. c. (1) Calculate the launch velocity of the projectile. $270/\sqrt{912.205}$ d. (1)Calculate the velocity of the projectile just before it lands. e. (2) If a second, identical projectile was launched at the same velocity you calculated in part c but at a slightly lower angle, would the velocity of the projectile just before it lands be greater less than equal to your answer to part d? Justify your reasoning using physics concepts.

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The outcomes and data provided for the SLOSS debate indicate that: A. There is a negative relationship between extinction rates and park area B. Larger parks have lower extinction rates C. Only large parks are useful for preventing extinction D. A and B only E. All of the above

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Use smallest possible integer coefficients. If a box is not needed, leave it blank. A voltaic electrochemical cell is constructed in which the following cell reaction occurs. The half- cell compartments are connected by a salt bridge. $Cu^{2+}(aq) + 2Cr^{2+}(aq) \rightarrow Cu(s) + 2Cr^{3+}(aq)$ What is the reaction that takes place in the anode compartment? + + What is the reaction that takes place in the cathode compartment? + + In the external circuit, electrons migrate electrode. the $Cr^{2+}$, $Cr^{3+}$ electrode the $Cu^{2+}$ In the salt bridge, anions migrate compartment. the $Cr^{2+}$, $Cr^{3+}$ compartment the $Cu^{2+}$

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Text: Evaluate the definite integral ∫ 5 −5 (3e ^-x / cosh x − sinh x) dx

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