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An interesting (but over simplified) model of an atom pictures an electron in orbit around a proton. Suppose this electron is moving in a circular orbit of radius 0.10 nm (1.0 10 10 m) and the force... A student performed two experiments to establish how effective manganese(iv) oxide was as a catalyst for the decomposition of hydrogen peroxide. The results below were obtained by carrying out these... Which of the following is a positive reason for learning chemistry? (a) Chemistry is relevant to daily life (b) Chemistry offers career opportunities (c) Chemistry studies interesting topics (d)... A Mealy sequential circuit is implemented using the circuit shown in Problem 1.26. Assume that if the input X changes, it changes at the same time as the falling edge of the clock. (a) Complete the... Examining photos of Newtons rings we observe that fringes at large values of m seem to be nearly equally spaced. To see that analytically, show that When m is large, the spacings between consecutive... The lever is attached to the shaft A using a key that has a width d and length of 25 mm. If the shaft is fixed and a vertical force of 200 N is applied perpendicular to the handle, determine the... Classify each of the following trusses as statically determinate, statically indeterminate, or unstable. If indeterminate, state its degree. a. b. c. d. Suppose we have two functions, (x, y) and h(x, y), where both have a value of 1 over a square region in the xy-plane and are zero everywhere else (Fig. P.11.21). If g(X, Y) is their convolution, make... A crate of mass 300 kg is raised by an electric motor through a height of 60 m in 45 s. Calculate: a. The weight of the crane (g = 10 N/kg) b. The useful work done. c. The useful power of the motor... Which of the following pairs contains one vector and one scalar quantity? A. Displacement : mass B. Displacement : velocity C. Distance : speed D. Speed : time Draw the shear and moment diagrams for each member of the frame. Assume A is a rocker, and D is pinned. 4 k 2 k/ft B . 3k 8 ft 4 ft 15 ft DLA. The _______and _______ systems work together to move the body and specific body parts. Write each of the numbers in Problems 1114 in fixed-point notation. a. 6 2 b. 3.217 10 7 c. 8.89 11 Suspended sediment in rivers. Consider a steep-walled river channel with a width of 50 m, a bankfull depth of 3 m (to the levee tops), and a slope of 0.5 m/km (i.e., note that this is the tangent of... Consider a scenario in which state colleges must actively recruit students. California Sci has $750,000 in assets available. Its Board of Regents has to consider several options. The board may decide... Determine the average punching shear stress the circular shaft creates in the metal plate through section AC and BD. Also, what is the average bearing stress developed on the surface of the plate... Compute the energy loss for gradual enlargements with cone angles from 2° to 60° in the increments shown in Fig. 10.5. For each case, water at 60°F is flowing at 85 gal/min in a 2-in... Figure P.11.10 shows two periodic functions, ?(x) and h(x), which are to be added to produce g(x). Sketch g(x); then draw diagrams of the real and imaginary frequency spectra, as well as the... A student investigated the ease with which various metal carbonates decompose on heating. She decide to heat equal masses of each carbonate and time how long it took for the carbon dioxide given off... A stream of electrons, each having an energy of 0.5 eV, impinges on a pair of extremely thin slits separated by 10 -2 mm. What is the distance between adjacent minima on a screen 20 m behind the... A toy plane of mass 0.4kg is attached to one end of a light, inextensible string of length 6m. The other end of the string is attached to the point 0. The string is taut and makes an angle of 45 with... A student is investigating the oscillation of a metre rule that has one end resting on the laboratory bench. The other end is held above the level of the bench by a spring attached at the 90.0 cm... Google the GIS data clearinghouse for your state. Go to the clearinghouse website. Does the website offer USGS DEMs, DRGs, and DOQs online? Does the website offer both 30-meter and 10-meter USGS DEMs? State whether each of the following statements is true or false. (a) As the magnitude of k increases, the momentum of the electron also increases. (b) As the magnitude of k increases, the wavelength... If the velocity of a liquid is 1.65 ft/s in a special pipe with an inside diameter of 12 in, what is the velocity in a 3-indiameter jet exiting from a nozzle attached to the pipe? Each reading on a thermometer can be made with an uncertainty of 0.5 C. The thermometer is used to measure a temperature rise from 20 C to 80 C. What is the percentage uncertainty in the measurement... A paint sample is tested in a Couette (cup and bob) viscometer that has an outer radius of $5 \mathrm{~cm}$, an inner radius of $4.9 \mathrm{~cm}$, and a bob length of $10 \mathrm{~cm}$. When the... Determine the force in each member of the truss. Indicate if the members are in tension or compression. Assume all members are pin connected. 1.5 k 2 k 2 k 8 ft 4 ft B 8 ft 8 ft 8 ft- Propagas is used in some central heating systems where natural gas is not available. It burns according to the following equation: a. What are the chemical names for propagas and natural gas? b.... On the geologic map in Fig. G-1 (Appendix G) draw the correct strike and dip symbol in each circle to indicate the attitude of Formation B and each dike. To verify your attitude symbols, Fig. G-2 can... The two steel members are joined together using a 30° scarf weld. Determine the average normal and average shear stress resisted in the plane of the weld. 15 kN 20 mm 30 40 mm 15 kN For the tank shown in Fig. 3.21, determine the depth of the oil h if the reading of the bottom pressure gage is 35.5 psig, the top of the tank is sealed, and the top gage reads 30.0 psig. Air Oil (sg... Figure 4.44 shows a rectangular gate holding water behind it. If the water is 6.00 ft deep, compute the magnitude and location of the resultant force on the gate. Then compute the forces on the hinge... A 50.0 mm, sharp-edge orifice is placed in a DN 100 Schedule 80 steel pipe. Compute the volume flow rate of ethylene glycol at 25C when a mercury manometer reads a 95-mm deflection. A pipeline carrying gasoline ( $\mathrm{SG}=0.72, \mu=0.7 \mathrm{cP}$ ) is 5 miles long and is made of 6 in. $\mathrm{Sch} .40$ commercial steel pipe. The line contains $2490^{\circ}$ elbows, 2 open... The pipe has a mass of 12 kg/m. If it is fixed to the wall at A, determine the resultant internal loadings acting on the cross section at B. 300 N 400 N m. 2 m 2 m 500 N If the allowable tensile stress for wires AB and AC is Ï allow = 180 MPa, and wire AB has a diameter of 5 mm and AC has a diameter of 6 mm, determine the greatest force P that can be applied to... Use Fig. 4.48. The surface is 2.50 m long. Ammonia sg = 0.826 0,62 m 1.25 m Using Fig. 6.74 , design a problem to help other students better understand how inductors behave when connected in series and when connected in R parallel. Find L eq in the circuit of Fig. 6.74. L4... Two ideal linear sheet polarizers are arranged with respect to the vertical with their transmission axis at 10 and 60, respectively. If a linearly polarized beam of light with its electric field at... You are given a solution of the ions Mg 2+ , Ca 2+ , and Ba 2+ . Devise a scheme to separate these ions using sodium sulfate. Note that magnesium sulfate is soluble. At the scene of an accident on a country road, police find skid marks stretching for 50 m. Tests on the road surface show that a skidding car decelerates at 6.5 m s 2 . Was the car that skidded... a. State which of the following processes is endothermic and which is exothermic. (i) The breaking of a chemical bond. (ii) The forming of a chemical bond. b. The table below shows the bond energy... A bed strikes 065 and dips 40 to the south. Two vertical cross sections need to be drawn through this bed, one oriented northsouth and the other oriented eastwest. By orthographic projection... Bone tissue contains _______. a. Living cells b. Collagen fibers c. Calcium and phosphorus d. All of these e. Both a and b The three types of muscle tissue are _______, _______, and _______. The state of strain at a point on the bracket has components of õ x = 150(10 -6 ), õ y = 200(10 -6 ), ó xy = -700(10 -6 ). Use the strain transformation... Classify each of the following trusses as statically determinate, indeterminate, or unstable. If indeterminate, state its degree. a. b. c. Determine the force in each member of the truss. State if the members are in tension or compression.Assume all members are pin connected. 3 m D -2 m- -2 m- -2 m- 5 kN 5 kN 5 kN Figure 8.18 shows a system used to spray polluted water into the air to increase the waters oxygen content and to cause volatile solvents in the water to vaporize. The pressure at point B just ahead... In the circuit in Fig. 6.64 , let i s = 4.5e 2t mA and the voltage across each capacitor is equal to zero at t = 0. Determine v 1 and v 2 and the energy stored in each capacitor for all t > 0. 36 24... Figure 9.23 shows the cross section of a cooling passage for an odd-shaped device. Compute the volume flow rate of water at 50°F that would produce a Reynolds number of 1.5 à 10 5 . 0.50... Figure P.6.33 shows the image irradiance distributions arising when a monochromatic point source illuminates three different optical systems, each having only one type of aberration. From the graphs... A pitot-static tube is connected to a differential manometer using water at 40C as the gage fluid. The velocity of air at 40C and atmospheric pressure is to be measured, and it is expected that the... A square storage room is equipped with automatic sprinklers for fire protection that spray 1000 gal/min of water. The floor is designed to drain this flow evenly to troughs near each outside wall.... Propose a structure for ether with molecular formula C 7 H 8 O that exhibits the following 13 C NMR spectrum. Carbon NMR 114.0 129.5, 120,714.0 55.1- 159.71 160 120 140 100 100 Chemical shift (ppm)... Which of the three normal modes of H 2 O in Figure 27.9 is best described as a bending mode? Does the bond angle remain unchanged in any of the modes? Which requires less energy, bond bending or bond... The shaft is made of L2 tool steel, has a diameter of 40 mm, and is fixed at its ends A and B. If it is subjected to the torque, determine the maximum shear stress in regions AC and CB. 2 kN-m 600 mm... The industrial robot is held in the stationary position shown. Draw the shear and moment diagrams of the arm ABC if it is pin connected at A and connected to a hydraulic cylinder (twoforce member)... If the allowable tensile and compressive stress for the beam are (Ï allow ) t = 2 ksi and (Ï allow ) c = 3 ksi, respectively, determine the maximum moment M that can be applied on the cross... A paper tube is formed by rolling a cardboard strip in a spiral and then gluing the edges together as shown. Determine the shear stress acting along the seam, which is at 50° from the horizontal,... Determine the force in each member of the truss. State whether the members are in tension or compression. Set P = 8 kN. 4 m B, 60 OD 60 4 m 4 m If the maximum force that any member can support is 8 kN in tension and 6 kN in compression, determine the maximum force P that can be supported at joint D. 4 m B, 60 Af 60 4 m 4 m - For a Parshall flume with a throat width of 9 in, calculate the head H corresponding to the minimum and maximum flows. Compute the flow area and hydraulic radius for a circular drain pipe 375 mm in diameter for a depth of 225 mm. Calculate the depth of flow in a trapezoidal channel with a bottom width of 3 m and whose walls slope 40 with the horizontal. The channel is made of unfinished concrete and is laid on a 0.1-percent... Two 1.0-MHz radio antennas emitting in-phase are separated by 600 m along a northsouth line. A radio receiver placed 2.0 km east is equidistant from both transmitting antennas and picks up a fairly... What is the machine language encoding for the following MIPS instructions? Give the answers in hexadecimal (hex). All offsets are in decimal. (i) addi $5, $4 ,4000 (ii) sw $5, 20($3) (iii) addu $4,... You are operating a seismic laboratory when an earthquake occurs. Your seismographs indicate that the P wave generated by the earthquake arrives at precisely 1:55 PM, whereas the S wave arrives 5... A piccolo can be approximated as a tube that is open at both ends. If a piccolo is 20 cm long, what is the frequency of the lowest note it can play? An owl is chasing a squirrel and is using echolocation (the reflection of sound) to aid in the hunt. If the squirrel is 25 m from the owl, how long does it take sound to travel from the owl to the... A steel building is 120 m tall when the outside temperature is 0C. How tall is the building on a hot summer day (30C)? The change in height is small, so express your answer with five significant... A steel building is 120 m tall when the outside temperature is 0C. How tall is the building on a hot summer day (30C)? The change in height is small, so express your answer with five significant... A gas stream containing 40.0 mole% hydrogen, 35.0% carbon monoxide, 20.0% carbon dioxide, and 5.0% methane is cooled from 1000C to 10C at a constant absolute pressure of 35 atm. Gas enters the cooler... A study involves a large number of families with exactly four children. After finding that the mean number of girls is 1.97, researchers rounded the result to 2 because it impossible to get 1.97... Compound D has the composition 77.8% carbon, 7.41% hydrogen and 14.8% oxygen. It mass and 1H NMR spectra are shown below. a. b. a. Calculate the empirical formula of D. b. From the mass spectrum,... Mineralization of bone tissue requires _______. a. Calcium ions b. Osteoclasts c. Elastin d. All of the above Sketch a set of equidistant 113 planes in a cubic unit cell. Draw a plausible mechanism for the following transformation: eat The A992 steel rod is subjected to the loading shown. If the cross-sectional area of the rod is 80 mm 2 , determine the displacement of B and A. Neglect the size of the couplings at B and C. 0,75 m... Determine the force in each member of the roof truss. State if the members are in tension or compression. Assume all members are pin connected. 3 m E- |B |C 10 kN 10 kN 10 kN -4 m-4m-4 m-4 m- Determine the force in all the members of the complex truss. State if the members are in tension or compression. 4 kN 30 30 D 6 m 30 30 3 m- -3 m- For the water tank shown in Fig. 4.43, compute the magnitude and location of the total force on the inclined wall. 8 ft Water 60 15 ft 10 ft Gasoline (sg = 0.67) is flowing at 0.11 m 3 /s in the fabricated tube shown in Fig. 6.19. If the pressure before the contraction is 415 kPa, calculate the pressure in the smaller tube. 415 kPa Flow... Bicycles like the one shown in the photo in Figure P8.78 typically have 24 possible gear ratios (three gears on the front and eight on the back). Suppose the diameters of the largest and smallest... Four long, straight wires each carrying a current I are oriented perpendicular to the plane of Figure P20.3, forming a square as shown. What is the direction of B(vector) at the center of the square... Jets of high-speed steam are used in spray cleaning. Steam at 15.0 bar with 150C of superheat is fed to a well-insulated valve at a rate of 1.00 kg/s. As the steam passes through the valve, its... A fitness enthusiast is trying to strengthen his calf muscles. He uses the exercise machine below. His heels apply a force to the padded bar. This lifts the heavy weights. a. The centre of mass of... A hot-air balloon rises vertically. At time t = 0, a ball is released from the balloon. This graph shows the variation of the balls velocity v with t. The ball hits the ground at t = 4.1 s. a.... Match each substance with its correct description. a coenzyme or metal ion formed at end of a metabolic pathway mainly ATP enters a reaction catalytic protein a. reactant b. enzyme c. cofactor d.... Match each organelle with its correct function. protein synthesis movement intracellular digestion modification of proteins lipid synthesis ATP formation ribosome assembly a. mitochondrion b.... Starting with cells, nature is organized on at least ________ levels. Instructions in________ govern how organisms are built and function. Which of the following statements is not true? Metabolic pathways _______. a. Occur in a stepwise series of chemical reactions b. Are speeded up by enzymes c. May break down or assemble molecules d.... A scientific approach to explaining some aspect of the natural world includes all of the following except ________ . a. A hypothesis b. Testing c. Faith-based views d. Systematic observations Ligaments are important components of the skeletal system because they _______. Bone remodeling has all of the following functions except _______. a. Helps maintain homeostasis in blood level of calcium b. Replaces old bone with fresh bone tissue c. Exchanges collagen with... The SO 2 molecule, analogous to H 2 O, has a 1 A 1 ground electronic state with the valence electronic configuration (1a 2 ) 2 (4b 2 ) 2 (6a 1 ) 2 (2b 1 ) 0 and low-lying excited singlet states of... List and discuss the several means by which cosmogenic radionuclides have been employed in the last two decades. Contrast the state of the art of establishing timing in the landscape in the absence... Draw a diagram (like Figure 4.6) that shows the energy flows for a planet with a twolayer atmosphere. The solar constant for the planet is S = 3,000 W/m 2 and the albedo of the planet is = 0:1. Make...
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