The telescoping arm abc is used to provide an elevated platform for construction workers. The workers and the platform together have a mass of 200 kg and a combined center of gravity located directly above c. For the position when θ=20o , determine (a) the force exerted at b by the single hydraulic cylinder bd, (b) the force exerted on the supporting carriage at a.

Which of the following ideas did greek philosopher democritus contribute to the atomic theory? a. each object is made up of one atom, which varies in size from very small to very large. b. matter is composed of only one kind of particle, which can be easily destroyed. c. every element has a specific type of atom, which remains the same size in all forms of matter. d. all matter is composed of small particles, which combine to make larger objects.