Engineering, 07.10.2019 19:30 maddiemalmstrom

2) steel rod (1) is fastened to brass rod (2) with a pin at b. the diameter of the pin is 7 /8 in. both rods are fixed at their ends a and c. the cross-sectional area of the steel rod is 1 in2 and the brass rod 1.5 in2 . the coefficient of thermal expansion for the steel is 6.5 x 10-6 /°f and its elastic modulus is 29 x 103 ksi. the coefficient of thermal expansion for the brass is 11.3 x 10-6 /°f and its elastic modulus is 15 x 103 ksi. a) the temperature drops 40°f. write the equilibrium and compatibility equation(s) needed to solve the problem along with supporting sketches. b) calculate the internal force in members (1) and (2) in kips. indicate tension or compression. [ans. to check: f1 = 9.2 k] c) calculate the average normal stress in each member in ksi. indicate tension or compression. d) compute the shear stress in the pin at b in ksi. [ans. to check: τ = 15.3 ksi] e) calculate the movement at b in inches. clearly indicate direction.

Answers: 1

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

Answers: 3

Answer

Engineering, 04.07.2019 18:10

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.

Answers: 1

Answer

Engineering, 04.07.2019 19:20

To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.

Answers: 1

Answer

Engineering, 04.07.2019 19:20

Determine the time of the day and month of the year at which the peak sensible cooling load occurs for a top floor, north-eastern corner room of an office building in durban for the following conditions: floor area: 8 x 8 x 3 m east and north walls: 115 mm face brick (outside), 20 mm air space, 115 mm ordinary brick (inside) with 15 mm plaster roof construction: suspended plasterboard ceiling, 450 mm air space, 150 mm concrete, 75mm screed, waterproofing no heat transfer across other surfaces window area 3x 1,5 m high in north wall only. ordinary glass with venetian blinds. lights and occupants : from 07: 00 to 18: 00 average light density: 25 w/m2 number of occupants : 5 seated, light office work room temperature 24°c

Answers: 3

Answer

You know the right answer?

2) steel rod (1) is fastened to brass rod (2) with a pin at b. the diameter of the pin is 7 /8 in. b...

Questions