Author Question: A barge is 15.0 m wide and 75.0 m long and has vertical sides. The bottom of the hull is 1.20 m ... (Read 262 times)

geoffrey · **on:** Jul 29, 2018

A barge is 15.0 m wide and 75.0 m long and has vertical sides. The bottom of the hull is 1.20 m below the water surface. What is the weight of the barge and its cargo, if it is floating in fresh water?

A)

22.6 MN

B)

13.2 MN

C)

1.35 MN

D)

1.13 MN

E)

11.3 MN

Question 2

A lens is made with a focal length of -40 cm using a material with index of refraction 1.50. A second lens is made with the SAME GEOMETRY as the first lens, but using a material having refractive index of 2.00.

What is the focal length of the second lens?
A) -80 cm B) -53 cm C) -30 cm D) -20 cm E) -40 cm