Calculate the ideal efficiency of an engine in which fuel is heated to 2500 K and the surrounding air is 200 K.

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.

If the area of a square has increased by a factor of 16, by how much has each side increased?

What does every magnet possess? a. iron metal b.strong magnetic field c.repulsion d.north and south poles