The sketch shows a painter's scaffold in mechanical equilibrium. The person in the middle weighs 420 N, and the tension in each
rope is 460 N.
What is the weight of the scaffold?

Which of these describe conduction transfer of heat between two objects that are touching transfer of heat by the actual movement of war matter the process in which energy is imitated by one of the object transmitted through space and absorbed by another a process in which energy is released by the molecules breaking apart

Figure 9 on page 362 shows various motions of balls. the curved path followed by the yellow ball in b in picture b is result of a) inertia b) centripetal motion c) gravity and horizontal velocity d) linear motion

When an object is heated it contracts. a. true b. false