The three-member frame structure in fig. p2.2-14 is subjected to a downward vertical load p at pin c. the pins at b, c, and d apply axial loads to members bd and cd, whose cross-sectional areas are a1 0.5 in2 and a2 1.0 in2, respectively. (a) if the axial stress in member bd is 1 1200 psi, what is the value of force p? (b) what is the corresponding axial stress, 2, in member cd?

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it

chemical energy --> gravitational potential energy --> kinetic energy --> elastic potential energy --> gravitational potential energy

explanation:

when emma starts the hike, the chemical energy stored in her body is used to climb up the mountain, and so she gains gravitational potential energy (because at the end, she will be at a higher height h above the ground). then she goes bungee jumping: as she falls, this gravitational potential energy is converted into kinetic energy (because her speed increases as she falls down), until the point when the rope stretches, and she stops moving. at that moment, all the kinetic energy is converted into elastic potential energy due to the stretching of the rope. then, this energy is released because the rope returns to its natural length, and emma gains a small increase in altitude , so she gains some gravitational potential energy.