a jet engine generates 160 KN of force as it propels a 20000 kg plane down a runway. If a 40 KN friction opposes the motion of the plane , how much time will it take for the plane to reach the speed of 33 m/s from rest.​

Aperson who doesn't have enough calcium in his or her diet is at risk for developing bones that are weak and break easily. this condition is known as  a.  osteoporosis.    b.  crohn's disease.    c.  celiac disease.    d.  hemophilia.

Whic disease reduces bone density and causes the bones to become brittle

When a freind is not tellig you everything you should a: bug them till they tell you b: ask them polietly to tell you c; stay silent your whole life d leave them they will tell you on there own time