Consider the two points B(2,4) and C(-1,-5) in the xy-plane. The coordinates are given in meters. A 20-N force is applied at point B at 120 degrees counterclockwise from the positive direction of the x-axis (where positive direction is horizontal to the right). Note that the force vector is also in the xy-plane (2D case). What is the magnitude of the moment of this force about point C?

What is the angular momentum of the bar about the axle?

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative