g How many helium-filled balloons would it take to lift a person? Assume the person has a mass of 73 kg and that each helium-filled balloon is spherical with a diameter of 33 cm. Express your answer using two significant figures.

How would a small bar magnet be oriented when placed at position x?

Which describes an object in projectile motion? check all that apply.a.gravity acts to pull the object downb.the object moves in a straight path.c.the forward velocity of the object is 0 m/s.d.the object’s inertia carries it forward.e.the path of the object is curved.

Which sections of the heating curve illustrate this process?