What Do Solar Engineers Do?

A boy weighing 108-lb starts from rest at the bottom A of a 6-percent incline and increases his speed at a constant rate to 7 mi/hr as he passes B, 40 ft along the incline from A. Determine his power output as he approaches B.

In a surface grinding operation, the wheel diameter = 8.0 in, wheel width = 1.0 in, wheel speed = 6000 ft/min, work speed = 40 ft/min, infeed = 0.002 in, and crossfeed = 0.20 in. The number of active grits per square inch of wheel surface = 400.

At 500oC, the diffusion coefficient of Cu in Ni is 1.3 x 10-22 m2/s, and the activation energy for diffusion is 256,000 J/mol. From this information, determine the diffusion coefficient of Cu in Ni at 900 oC. (R = 8.314 J / (mol K)) 0oC = 273 K

Identify factors that can cause a process to become out of control. Give several examples of such factors.

At a water-treatment plant, water at 20°C flows from tank A to tank B at a rate of 600 L/s through a 50 cm diameter asphalt lined iron pipe that is 150 m long.

When passing another vehicle, when is it acceptable to drive over the speed limit? A. When there's a broken yellow line next to you B. Under no circumstances C. When there's a broken white line next to you U D. If an emergency vehicle is behind you

Ceramics has the weakness of resisting high compression force but low tensile force. a) - True b) - False

Technician A says that gear lube and bearing grease cannot be substituted due to the different housing and seal designs each lubricant demands in a vehicle. Technician B says that gear lube is thicker than bearing grease. Who is correct?

The capacitor can withstand a peak voltage of 600 volts. If the voltage source operates at the resonance frequency, what maximum voltage amplitude VmaxVmaxV_max can the source have if the maximum capacitor voltage is not exceeded?

Do Otto heat engines operate on a closed system or an open system? Why?