- Moving a sofa into a moving trucks requires 2925 J of work by the moving man. If the work done by the inclined plane to move the sofa is 2205 J, what is the efficiency of the inclined plane?
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For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

What are similarities and differences between refraction, reflection, diffraction and absorption?