You pull on a spring whose spring constant is 20 N/m, and stretch it from its equilibrium length of 0.4 m to a length of 0.9 m. Estimate the work done by dividing the stretching process into two stages and using the average force you exert to calculate work done during each stage. J

As shown in fig. p3.64, a closed, rigid tank fitted with a fine-wire electric resistor is filled with refrigerant 22, initially at 2108c, a quality of 80%, and a volume of 0.01 m3. a 12-volt battery provides a 5-amp current to the resistor for 5 minutes. if the final temperature of the refrigerant is 408c, determine the heat transfer, in kj, from the refrigerant.

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.