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A vehicle is stuck on the railroad tracks as a 30*10^6 lb train is approaching with a speed of 75mph. As soon as the problem is detected, the train's emergency brakes are activated, locking the wheels and causing the locomotive to slide. If the coefficient of kinetic friction between the train and the track is 0.45, what is the minimum distance d at which the brakes must be applied to avoid a collision? Treat the train as a particle and assume that the railroad tracks are rectilinear and horizontal.
An engine block with a surface area measured to be 0.90m2 generates a power output of 55 kW with a net engine efficiency of 35%. The engine block operates inside a compartment at 157oC and the average convection heat transfer coefficient of 60 W/m..
If the minimum attractive rate of return is20% per year, determine the one machine that should be selected on the basis of a rate of return analysis.
Is there an economic case for renewable energy? This issue was recently a "hot topic" in the news, and you are referred to the following newspaper article for a representation from the media.
2. What is the design objective? -to minimize the required power input to the compressors 3. What parameters does the design engineer control?
To make strawberry jam, crushed strawberries and sugar are mixed in a 45:55 mass ratio, and the mixture is heated to evaporate water until the residue contains one-third water by mass. Calculate how many pounds of strawberries are needed to make a..
determine the electrical power input to the pump. the density of water is 1kg/l.
Determine the smallest horizontal force required to pull out wedge A. The crate has a weight of 200 and the coefficient of static friction at all contacting surfaces is = 0.7. Neglect the weight of the wedge.
What is differential levelling? list the procedure for carrying out a differential levelling exercise where one point is beyond the range of the instrement . 100 word limit
The external heat transfer coefficient is h=10 W/m^2*K. What is the rate of heat loss to the ambient?
Derive eulers equation 1- Derive. From first principles eulers equation from the rate of change of momentum 2- Show by integration how Eulers equation derives Bernoullis equation
Determine the velocity of the airplane required for pilot to experience weightlessness at the top of the circular path.
what is the cooling temperature range obtained by thermoelectric refrigeration?
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