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1.How does cracking pressure percentage change as the maximum pressure setting of the relief valve increases? Why?
2.Explain the term pressure override as it relates to pressure control valves.
3. Why is an understanding of the concepts of cracking pressure and pressure override important when selecting and installing a relief valve in a hydraulic system?
4. How do the concepts of cracking pressure, pressure override and full-flow pressure relate to the operation of other control valves, such as sequence and counterbalance valves?
An electron in the n=7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 93.1nm. What is the value of n for the level to which the electron relaxed
organic reactions can be classified as substitutions eliminations or additions and the reagents can be classified as
If the laser is pointed toward a pinhole with a diameter of 1.0 mm, how many photons will travel through the pinhole per second? Assume that the light intensity is equally distributed throughout the entire cross-sectional area of the beam. (1 W = ..
Calculate the molarity of a solution made by adding 27.8 mL of concentrated hydrochloric acid (37.3 % by mass, density 1.19 g/mL) to some water in a volumetric flask, then adding water
A sample of gas occupies 15.0 liters at 4.00 atmospheres and 300 K. What is the new volume of the gas if pressure is decreased to 2.00 atmospheres and temperature is increased to 400 K?
after 50 g of certain substance is heated in air until no further reaction occurs 39.9 g of metal is left. is the
When 0.0190 mol gaseous NH3 and 0.0180 mol gaseous O2 are placed in a 1.00 L container at a certain temperature, the N2 concentration at equilibrium is 2.10×10-3 M. Calculate Keq for the reaction at this temperature.
How would you calculate the quantitative solubility of calcium nitrate (Ca(NO3)2 after saturating the solution, heating, and drying and the precipitate formed weighs 1.3 g
calculate the solubility of potassium bromide at 23 degrees celuius.assume that the solubility increases by an equal
An alkane with a molecular formula of c18h18 reacts with chlorine in the presence of light and heat to give a single monochloride c8h17cl. What is the most resonalble structure for the starting alkane? and why?
Give five very important precautions to be taken into consideration while preparing an alcohol using Grignard reaction, explain each one
The complete combustion of 1.076g of C9H8O in a bomb calorimeter ( Cccalorimeter=3.895 kJ/ degree C) produced an increase in temperature of 11.21C. Calculate the molar enthalpy of combustion in kJ/mol.
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