A bridge of length 50 m and mass 90000 kg is supported at each end as shown below. A truck of mass 30000 kg is located 10 m from the left end. Find the forces at A and B.

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?