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...

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...

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...

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 Ã 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...

Multiprotein complexes are formed by weak noncovalent interactions between the proteins. Suppose proteins A and B form a heterodimer with a K d = 10 -6 M: (a) Calculate the fraction of monomers that...

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,...

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 -

Classify each of the following trusses as statically determinate, indeterminate, or unstable. If indeterminate, state its degree. a. b. c.

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....

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...

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,...

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...

Sketch a set of equidistant 113 planes in a cubic unit cell.

Diatomic nitrogen and oxygen molecules can stick to the surface of a container because of van der Waals forces. Assume that these molecules are stuck to the surface with binding energy...

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 truss. State whether the members are in tension or compression. Set P = 8 kN. 4 m B, 60 OD 60 4 m 4 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...

The variable resistor R in the circuit of Fig. 11.50 is adjusted until it absorbs the maximum average power. Find R and the maximum average power absorbed. -j100 2 100 2 100 2 100/0 V (+ j100 2 lle

Compute the flow area and hydraulic radius for a circular drain pipe 375 mm in diameter for a depth of 225 mm.

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....

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...

The Hamiltonian of this model may be written as \[ H=-\frac{1}{2} c \sum_{i eq j} \sigma_{i} \sigma_{j}-\mu B \sum_{i} \sigma_{i} \] The double sum here is equal to \(\sum_{i} \sigma_{i} \sum_{j}...

Ozone (O 3 ) has an absorptivity at 300. nm of 0.000500 torr 1 cm 1 . In atmospheric chemistry the amount of ozone in the atmosphere is quantified using the Dobson unit (DU), where 1 DU is equivalent...

Determine the force in each member of the truss. State if the members are in tension or compression. 3k 2k 3 NG 12 ft D |C 10 ft- 10 ft - 10 ft- 10 ft- B.

Determine the force in members GF, CF, and CD of the roof truss and indicate if the members are in tension or compression. 1.5 kN 1.70 m 2 kN 1.5 m 0,8 m G. -1 m- 2 m 2 m

Determine the shear and moment throughout the beam as functions of x. 8 k 10 k 2 k/ft 40 k-ft - 6 ft 4 ft -

A venturi meter is a device that uses a constriction in a flow system to measure the velocity of flow. Figure 6.17 illustrates one type of design. If the main pipe section is a standard hydraulic...

A pipeline transporting crude oil (sg = 0.93) at 1200 L/min is made of DN 150 Schedule 80 steel pipe. Pumping stations are spaced 3.2 km apart. If the oil is at 10C, calculate (a) The pressure drop...

Water at 10°C is being delivered to a tank on the roof of a building, as shown in Fig. 11.29. The elbow is standard. What pressure must exist at point A for 200 L/min to be delivered? 2.5 m...

Use the phasor method, described in conjunction with Fig. 7.17, to explain how two equal-amplitude waves of sightly different frequencies generate the beat pattern shown in Fig. 7.19 or Fig. P.7.19a....

A cart of mass m 1 = 10 kg slides down a friction less ramp and is made to collide with a second cart of mass m 2 = 20 kg, which then heads into a vertical loop of radius 0.25 m as shown in Figure...

A beam of natural light is incident on an airglass interface (n ti = 1.5) at 40. Compute the degree of polarization of the reflected light.

Figure P12.40 shows an experiment in which sound waves generated by a singer and having a single frequency are emitted by two speakers. These sound waves interfere at a listener located at point P....

An ion with the formula C 7 H 10 NO 2 + appears at m/z 140. (a) Write the formulas of the isotopologues contributing to m/z 141 and predict the intensity at m/z 141 relative to the intensity at m/z...

a. Draw a dot-and-cross diagram for a molecule of selenium hexafluoride, SeF6. A single selenium atom has six electrons in its outer shell. b. Predict the shape of selenium hexafluoride.

The diagram below shows a uniform metre rule, weight W, pivoted at the 75 cm mark and balanced by a force of 2 N acting at the 95 cm mark. a. Calculate the moment of the 2 N force about the pivot. b....

An object moving with s.h.m. goes through two complete cycles in 1.0 s. Calculate: a. The period T b. The frequency f c. The angular frequency .

A 0.7812-g sample of impure Al 2 (CO 3 ) 3 decomposed with HCl; the liberated CO 2 was collected on calcium oxide and found to weigh 0.04380 g. Calculate the percentage of aluminum in the sample.

Write down the expression for the radial distribution function of a 2p electron in a hydrogenic atom and determine the radius at which the electron is most likely to be found.

(a) Can an intermediate appear as a reactant in the first step of a reaction mechanism? (b) On a reaction energy profile diagram, is an intermediate represented as a peak or a valley? (c) If a...

Consider the circumferential and translational vectors of a potential carbon nanotube shown below. (a) What are the n and m values of the circumferential vector C? (b) Is the T vector shown below a...

Predict the product and draw the mechanism for each of the following reactions: a. b. c. 1) LAH 2) H20 1) LAH 2) H20

Tetrahydrofuran (THF) can be formed by treating 1, 4-butanediol with sulfuric acid. Propose a mechanism for this transformation. H,SO, H;SO. 1,4-Butanediol Tetrahydrofuran (THF)

Determine the maximum average shear stress in pin A of the truss. A horizontal force of P = 40 kN is applied to joint C. Each pin has a diameter of 25 mm and is subjected to double shear. 1.5 m A 2 m

The shear stressstrain diagram for an alloy is shown in the figure. If a bolt having a diameter of 0.25 in. is made of this material and used in the lap joint, determine the modulus of elasticity E...

The device is used to measure a change in temperature. Bars AB and CD are made of A-36 steel and 2014-T6 aluminum alloy, respectively. When the temperature is at 75°F, ACE is in the horizontal...

The beam is constructed from three boards. If it is subjected to a shear of V = 5 kip, determine the maximum allowable spacing s of the nails used to hold the top and bottom flanges to the web. Each...

The bell crank is pinned at A and supported by a short link BC. If it is subjected to the force of 80 N, determine the principal stresses at (a) point D and (b) point E. The crank is constructed from...

The wide-flange beam is subjected to the 50-kN force. Determine the principal stresses in the beam at point A located on the web at the bottom of the upper flange. Although it is not very accurate,...

Determine the force in each member of the roof truss. State if the members are in tension or compression.Assume B is a pin and C is a roller support. H60. 60 60 30 60 B 2 m - 2 m- 2 kN 2 kN

The Howe truss is subjected to the loading shown. Determine the forces in members GF, CD, and GC. State if the members are in tension or compression. Assume all members are pin connected. 5 kN G- 5...

Determine the force developed in each member of the space truss and state if the members are in tension or compression.The crate has a weight of 150 lb. 6 ft. RC 6 ft 6 ft, B. 6 ft

Use the portal method of analysis and draw the moment diagram for column AFE. 5 k 12 ft 4 k 12 ft 15 ft-

If air has a constant specific weight of 0.075 lb/ft 3 , what pressure difference would result when driving from the base to the top of Pikes Peak, if the climb for the trip is 8400 ft?

For the system shown in Fig. 6.24, calculate (a) the volume flow rate of oil from the nozzle and (b) the pressures at A and B. Oil 3,0 m (sg = 0.85) 35-mm diameter 120-mm OD x 3.5-mm wall Flow B+ FA+...

What pressure is required above the water in Fig. 6.12 to cause the jet to rise to 28.0 ft? The water depth is 4.50 ft. h

To what height will the jet of fluid rise for the conditions shown in Fig. 6.39? Jet 2.60 m 75 mm 0.85 m

Determine the maximum power delivered to the variable resistor R shown in the circuit of Fig. 4.136. 2 Vx 10 (4 20 20 : 10 . www

Use the superposition principle to obtain v x in the circuit of Fig. 10.89 . Let v s = 50 sin 2t V and i s = 12 cos(6t + 10°) A. 20 50 mF is Vx 20 X. Vs (+1

Two ideal HN-50 linear polarizers are positioned one behind the other. What angle should their transmission axes make if an incident unpolarized 100 W/m 2 beam is to be reduced to 30.0 W/m 2 on...

Figure P.10.30 is a computer-generated Fraunhofer irradiance distribution. Describe the aperture that would give rise to such a pattern and give your reasoning in detail. Figure P.10.30

What alcohol would be obtained from treatment of each alkene in Problem 37 with aqueous sulfuric acid? Would any of these alkenes give a different product upon oxymercuration demercuration? Upon...

Give the expected products of the following reactions or reaction sequences. (a) (b) (c) H,O, A BCH-CH,CH> CH,Br

A ball is fixed to the end of a string, which is attached to the ceiling at point P. As the drawing shows, the ball is projected downward at A with the launch speed 0 . Traveling on a circular path,...

a. Predict the shapes of the following molecules i. Tetrachloromethane, CCl 4 ii. Beryllium chloride, BeCl 2 iii. Phosphorus(III) chloride. b. Draw dot-and-cross diagrams for the following molecules...

a. The wave in the shallow tank of water shown in the figure moves at 0.08 m/s towards the left. How long does it take for the wave to return to the position 3CY, but moving to the right? b. A man is...

A girl wearing a parachute jumps from a helicopter. She does not open the parachute straight away. The table shows her speed during the 9 seconds after she jumps. a. Copy and complete the table by...

A metal ball is dropped into a tall cylinder of oil. The ball initially accelerates but soon reaches a terminal velocity. a. By considering the forces on the metal ball bearing, explain why it first...

Copy and complete the following table. Place a tick or a cross in each box as appropriate. monomer polymer macromolecule polysaccharide contains subunits that form branched chains contains amino...

Two small spheres each of mass 20 g hang side by side with their centres 5.00 mm apart. Calculate the gravitational attraction between the two spheres.

A ship is pulled at a constant speed by two small boats, A and B, as shown. The engine of the ship does not produce any force. The tension in each cable between A and B and the ship is 4000 N. a....

This is a velocitytime graph for a vertically bouncing ball. The ball is released at A and strikes the ground at B. The ball leaves the ground at D and reaches its maximum height at E. The effects of...

Prove that tanh -1 A + tanh -1 B = tanh -1 (A + B/1 + AB).

A company makes climbing rope, which is cut to lengths of 50m with a standard deviation of 1.5m. A sample of 150 pieces of rope is measured and the results are recorded. Test, at the 5% significance...

Imagine a sedimentary basin on some planetary body that is confined on all sides and filled to a depth of 1 km. The horizontal strains, xx and yy are both zero, and the vertical stress at any depth...