Consider a double-slit with a distance between the slits of 0.05 mm and slit width of 0.01 mm. Suppose the screen is a distance of 1 m from the double-slit and light with a wavelength of 600 nm is illuminating the slits. Required:
What is the distance Δdx in mm between the places where the intensity is zero due to the double slit effect?

A75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is to be replaced by a high-efficiency motor that has an efficiency of 95.4 percent. the motor operates 4368 hours a year at a load factor of 0.75. taking the cost of electricity to be $0.12/kwh, determine the amount of energy and money saved as a result of installing the high-efficiency motor instead of the standard motor. also, determine the simple payback period if the pu