When the forces applied to an object act in the same direction, the net force is the of the individual forces

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

In which of the following would the particles move most rapidly? a. ice at -20 °c b. water at 20 °c c. steam at 110 °c d. boiling water e. ice at 0 °c

Adolphin emits ultrasound at 100khz and uses the timing of reflections to determine the position of objects in the water. part a what is the wavelength of this ultrasound? assume that temperature of water is 20 degrees c. answer in cm