Aplayground merry-go-round with a radius of 1.80 m has a mass of 120 kg and is rotating with an angular speed of 0.400 rev/s. what is its angular speed after a 37.5-kg child gets onto it by grabbing its outer edge? the child is initially at rest.

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

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