A 10 000 kg airplane lands, descending a vertical distance of 10 km while traveling 100 km measured along the ground. What is the plane's loss of
potential energy?*

Identify two factors that determine the rate of stream erosion

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong chain

Find an expression for the electric field e⃗ at the center of the semicircle. hint: a small piece of arc length δs spans a small angle δθ=δs /r, where r is the radius. express your answer in terms of the variables q, l, unit vectors i^, j^, and appropriate constants.