PHYS 1101W Lecture 1: Week 1

1. A sphere has a radius of 21 cm and a mass of 1.9 kg. Itsmassdensity is about:
(1) 49 kg/m3 (2) 2.0 £ 10¡6 kg/m3 (3) 2.0 £10¡2 kg/m3 (4) 1.4 kg/m3(5) 14 kg/m3

1. A sphere has a radius of 21 cm and a mass of 1.9 kg. Itsmassdensity is about:
(1) 49 kg/m3 (2) 2.0 £ 10¡6 kg/m3 (3) 2.0 £10¡2 kg/m3 (4) 1.4 kg/m3(5) 14 kg/m3

The table below shows the buoyant force acting on each of the 5objects, all of which are fully submerged in bromine. Each objectweighs 70 N. Which of the objects will sink? Choose all thatapply.

Object 1 Object 2 Object 3 Object 4 Object 5

Buoyant Force (N) 70 49 6 70 98

Choose all that apply


___Object 1
___ Object 2
___ Object 3
___ Object 4
___ Object 5