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1.A sandbag is dropped vertically from a balloon which is ascending at a constant speed of 6m/s. If the bag is released with the same upward velocity of 6m/s when t=0 and hits the ground when t-8 seconds, determine the speed of the bag as it hit the ground and altitude of the balloon at this instant (t=8s).
2.How many watts of power would it take to heat 1 L of water(weighing 1.0 kg) by 10 degrees Celsius n 1.0 h? Assume no heat losses occur, so all of the energy expneded goes into heating the water.
3.When would you be likely to use a descriptive model of the design process? when would you use a prescriptive model?
A wheel has an initial clockwise angular velocity of 12 rad/s and a constant angular acceleration of 3 rad/s2. A) Determine the number of revolutions it must undergo to acquire a clockwise angular velocity of 15 rad/s.
A flood control project has a construction cost during the first year of $10 million, during the second year $6 million, and during the third year $2 million. It is completed at the end of the third year and thereafter incurs an annual operating c..
When a net amount of work is done on a closed system undergoing an INTERNALLY REVERSIBLE process, a net heat transfer of energy from the system also occurs.
calculate the amplitude F0 of the sinusoidal excitation force that is necessary to produce a steady-state vibration with a velocity amplitude of 10 m/s at resonance. what is the corresponding amplitude of the acceleration
Compute the corrected horizontal distance for the following conditions: Temperature: 25oC Tape length: 29.990m Slope angle: -3o42’ Slope measurement: 211.416m
A thin-walled cylindrical tank of radius r is subjected simultaneously to internal pressure p and a compressive force P through rigid end plates. Determine the magnitude of force P to produce pure shear in the cylindrical wall.
An 8-inch water main with a flow rate of 14 ft3/sec raises 100-feet. At the beginning of the main the pressure is 110 psig and drops to 50-psig at the end. For this water main calculate the head loss.
The 3.5-Mg engine is suspended from a spreader beam having a negligible mass and is hoisted by a crane which exerts a force of 40 kN on the hoisting cable. Determine the distance the engine is hoisted in 2.4 s, starting from rest.
a circular aluminum tube of L=600 mm is loaded in compression by forces P. The outside and inside diameters are d2=75 mm and d1=63mm, respectively. A strain Gage is placed on the outside of the tube to measure normal strains in the longitudinal di..
A typical energy of a laser pulse from such lasers is 1 mJ. Suppose that energy is uniformly distributed over the laser spot, and the effect is constant during the pulse (a square pulse).
Adequately describe the abiotic factors that determinethe types and numbers of species found in yourzone. Examples of factors: temperature, access to sunlightfor photosynthesis, dissolved oxygen content, availability of nutrients such as carbon.
calculate the depth h of mud for which the 3m concrete retaining wall is on the verge of tipping about its forward edge A. the density of mud may be taken to be 1760 kg/m3 and that of concrete to be 2400 kg/m3.
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