Reference no: EM13703812
Current airbag regulations specify that they must only pass a test designed to protect a 175 pound male who is not wearing a seatbelt. There is currently a discussion of lowering the explosive force by 30%, so that smaller-sized people (including women) would be less subject to injury due to the explosive force of the airbag; this would be adequate to protect seat belted individuals of around 175 pounds, but not enough for substantially heavier individuals or those not wearing seatbelts. (Note: current airbags cost about $30. to manufacture).
Ethical question: In one paragraph, discuss what you think of this proposed regulation, which is currently being discussed in the federal government.
1. Suppose that the US military is considering a new lifetime regulation on their helicopter rotor blades. Instead of using them for 1000 hours (which leads to a likelihood of 5 failures per 10,000 blade sets), they are considering reducing the likelihood of a crash by replacing the blades after 500 hours, thus reducing the likelihood of a crash to 1 failure per 10,000 blade sets. Assuming a fleet of 10,000 helicopters, and assuming the helicopters are flow for 1000 hours/year, and a cost per set of blades of $5000.
a) Estimate the extra cost per year due to the increased use of blades
b) Estimate the cost savings due to fewer crashes (assume a cost of $1million per helicopter, assume an average of two people in the helicopter, and remember that helicopter crashes are usually fatal).
c) Based on your calculations, what would you recommend?
2) Determine the bonding type between the following types of atoms:
Al-Ni, Si-Ge, C-O, Fe-O, Ne-Ar
(Hint: use the electro negativity table in Callister).
3) Explain why a Ti atom is larger than a Cu atom.
|
Lbm block is pushed down a frictionless incline with a force
: A 10 lbm block is pushed down a frictionless incline with a force of 5 lbf. the incline is 30 degrees relative to the horizontal. if the block starts from rest, what is its speed after it has been pushed 12 ft. Assume that gravity is 32.0 ft/ sec^2
|
|
What is torque required to stop it from spinning
: A Cylinder of mass 20 lbs, radius 5in and height 10in is spinning about its axis of symmetry (central axis) at 200 rpms. What is torque required to stop it from spinning
|
|
Matrix with digits of the input number as diagonal elements
: Write the MATLAB program which takes 8 digits number as input, then creates an 8x8 matrix with digits of the input number as diagonal elements and zeroes elsewhere using for loops. Then, execute the program using your student ID as input.
|
|
Determine the actual exit temperature for the compressor
: A given mass flow rate (.17 kg/min) of an ideal gas flows through an adiabatic compressor operating at steady state. The compressor has an adiabatic efficiency of N(%) = 87.5. The gas has a molecular weight of MW = 28.5 (kg/kmol) and a specific heat ..
|
|
Estimate extra cost per year due to increased use of blades
: Current airbag regulations specify that they must only pass a test designed to protect a 175 pound male who is not wearing a seatbelt. There is currently a discussion of lowering the explosive force by 30%, so that smaller-sized people (including wom..
|
|
Matlab program-average of digits of part using for loops
: Write the MATLAB program to find the maximum, minimum and average of the digits of part (a) using for loops. Execute the program and list the output. Note that you are not allowed to use MATLAB commands max(x), min(x) and mean(x), except for checking..
|
|
What specific materials are used for solar cells
: What specific materials are used for solar cells? What specific properties these materials process in order for the solar cells to the function properly?
|
|
Double-pipe heat exchanger
: Double-pipe heat exchanger. This type of heat exchanger is composed of concentric pipes, with hot water flowing in the inner pipe while cold water flows in the annulus between the inner pipe wall and outer pipe wall.
|
|
Mass of oxygen gas in a container with a volume
: What is the mass of oxygen gas in a container with a volume of 25 ft3, at a pressure of 14.7 psia and a temperature of 75oF?
|