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jessica gray

jessica g.

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P5.26 A pendulum has an oscillation period T which is assumed to depend upon its length L, bob mass m, angle of swing 0, and the acceleration of gravity. A pendulum 1 m long, with a bob mass of 200 g, is tested on earth and found to have a period of 2.04 s when swinging at 20°. (a) What is its period when it swings at 45°? A similarly constructed pendulum, with L = 30 cm and m = 100 g, is to swing on the moon (g = 1.62m / (s ^ 2)) at theta = 20 deg (b) What will be its period?

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Suppose the velocity of an electron in an atom is known to an accuracy of 2.0\times 103 m/s2.0\times 103 m/s (reasonably accurate compared with orbital velocities). What is the electrons minimum uncertainty in position?

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Is there a dominant strategy equilibrium solved by iterated elimination of dominated strategies?

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A buffered solution containing dissolved aniline, C6H5NH2, and aniline hydrochloride, C6H5NH3Cl, has a pH of 5.47. Determine the concentration of C6H5NH2 in the solution if the concentration of C6H5NH3Cl is 0.290 M. The pKa of aniline is 9.13. [CH5NH2]= M B. Calculate the change in pH of the solution, pH, if 0.354 g NaOH is added to the buffer for a final volume of 1.85 L. Assume that any contribution of NaOH to the volume is negligible pH=

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One of the advantages of using heparinized whole blood as a specimen for measuring electrolytes is It insures shorter TAT It can distinguish between total and free \( \mathrm{Na}+ \) It insures shorter PRAT It can be used for both arterial and venous blood

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12. prepare the sales day book, purchase day book, sales ledger, purchase ledger and nominal ledger. 20X9 August 17 Credit purchases: Hareem £81; Fahmi £55; Marzia £75. 20 Goods returned by us to Marzia £14. 24 Credit sales: Karim £57; Nabila £65; Oshanti £112. 28 Goods returned to us by OShanti £24. 31 Credit sales: Natasha £38

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QUESTION 6. Determine the tension in each segment of the cable shown in the figure. P=5 kN, Q=8 kN, a=5 m, b=7 m, c=7 m, d=2 m, \theta=45^\circ. P and Q are in vertical direction.

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1. i) What is the geometric meaning of normal strain? ii) Which material properties describe a) stiffness; b) strength; and c)ductility of a material. iii)A tension test was performed on a steel specimen having an original diameter of 0.5 in. and a gauge length(the uniform part of the sample, the subject of study) of 2.00 in. The data is listed in the table. Plot the stress- strain diagram and determine approximately the modulus of elasticity (Young's modulus), the ultimate stress, and the rupture strain. Use a scale of 1 in. = 15 ksi and 1 in. = 0.05 in./in. Redraw the linear-elastic region, using the same stress scale but a strain scale of 1 in. = 0.001 in. (you can replace 1 in. by one or two grids in your paper.) Load (kip) Elongation (in.) 0 0 2.50 0.0009 6.50 0.0025 8.50 0.0040 9.20 0.0065 9.80 0.0098 12.0 0.0400 14.0 0.1200 14.5 0.2500 14.0 0.3500 13.2 0.4700

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2. A solid core is given whose depth is 6 cm. Relative permeability of core is 100 and the current in the coil is 4A. Determine a. Equivalent circuit of the core b. Value of reluctances of the each section of the core c. Equivalent reluctance of the core d. Value of total flux e. Value of flux in each core leg f. Flux density B in each core leg

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2. You are given the following experimental data that a pressure gauge collected during a diving excersise. Depth (meters) 0 10 20 30 40 50 60 70 80 Pressure (kPa) 100.7 202.2 300.1 402.8 504.8 604.4 704.4 803.7 904.2 r*g*h a. Create one plot that shows the plot of the experimental data. Notes: (1) Depth, being parallel with \"up and down\" is conventionally plotted on the y-axis. (2) Any positive depth is conventionally plotted below the x-axis (negative) (3) Specify a visible linestyle that does not imply that there is more experimental data than these 9 data points. b. Use the depth pressure equation $P(h) = \frac{r*g*h}{1000} + P_{atm}$ \text{--where:} r is water density, g is gravity, h is the depth below the surface (in meters), $P_{atm}$ is atmospheric pressure, and P is in kPa--to make a plot of the theoretical pressures. Plot pressure for depths between 0 and 80 meters with g = 9.81 m/s², r = 1030 kg/m³, and $P_{atm}$ is 101.325 kPa. Note: experimental data is conventially plotted in the same graph as the associated theoretical relationship.

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