Find maximum load to expect no more blocks to break
The breaking strength X [kg] of a certain type of plastic block is normally distributed with a mean of 1500 kg and a standard deviation of 50 kg. What is the maximum load such that we can expect no more than 5% of the blocks to break?
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A household refrigerator with a cop of 1.8 removes heat from the refrigerator space at a rate of 90 KJ/min. Determine the electric power consumed by the refrigerator and the rate of heat transfer to the kitchen air.
Find the ground state energy of an electron confined to a 1 D box of length 0.1 nm. Show an energy level diagram showing the first 5 levels. Calculate the wavelengths of the photons corresponding to transitions between the third level and the grou
You are an engineer in an electric-generation station. You know that flames in the boiler reach a temp of 1200 K and that cooling water at 300 K is available from a nearby river. What is the max efficiency your plant will achieve?
A block-spring system oscillates with an amplitude of 3.40 cm. The spring constant is 250 N/m and the mass of the block is 0.800 kg. (a) Determine the mechanical energy of the system.
The breaking strength X [kg] of a certain type of plastic block is normally distributed with a mean of 1500 kg and a standard deviation of 50 kg.
The thermal conductivity parallel to continuous reinforcing fibers in a composite with E-glass in a matrix of polyester is found to be 0.65 W/m.K. The thermal conductivity of E-glass is 0.97 W/m.K and that of the polyester is 0.17 W/m.K.
Find the specific work and heat transfer. Estimate the specific heat transfer from the area in a T-s diagram and compare it to the correct value.
Determine the work done in lifting a 250-lb refrigerator 4 ft vertically into a van. Alternatively, the refrigerator could be placed on a cart and rolled up a 10-ft-long ramp.
How much less time has this person's watch registered in 35 y than the watch of someone who has stayed at home? Is it true that commuters live significantly longer or does it just seem longer?
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