How long it will take for heater to raise water temperature
An 1800-W electric resistance heating element is immersed in 40 kg of water initially at 20oC. Determine how long it will take for this heater to raise the water temperature to 80oC.
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Skater A has a mass of 33.5 kg and travels in the +x direction at 2.75 m/s. Skater B has a mass of 75.5 kg and is moving in the +y direction at 1.77 m/s. They collide and cling together. Find the final speed of the couple.
What is the maximum length of longitudinal through crack that can be permitted with a safety factor of 3, if the material has a fracture toughness Kic=50 MPa sqrt(m)?
What is the maximum amount of ethanol (in grams) that can be produced when 0.036 kg of ethylene (C2H4) and0.062 kg of steam are placed into the reaction vessel?
Calculate the average decelerating impact force per unit area, if a person falling with a terminal velocity of 62,5 m/s is decelerated to zero velocity over a distance of 1m.
You are asked to prepare a 0.8500 M solution ofaluminum nitrate. You find that you have only 50.00 g of the solid.
Use conservation of relativistic energy and momentum to determine (a) the kinetic energy of the electron, and (b) the wavelength of the recoiling photon. Use p = E/c
Taking the average specific heat of the human body to be 3.6 kJ/kg-oC, determine the drop in the average body temperature of this person under the influence of this cold water.
Calculate percentage distribution for the independent variable. Calculate the expected frequency (fe) for this distribution. What is the degree of freedom? What is the Chi-square critical if alpha is set at .05?
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