A wooden raft has a mass of 55 kg. When empty it floats in water ...

[gbarreiro]

A wooden raft has a mass of 55 kg. When empty it floats in water (density with 64 of its volume submerged. What maximum mass of sand can be put on the raft without sinking it?
 
  What will be an ideal response?

Question 2

Four 2.0-C point are at the corners of a rectangle with sides of length 3.0 cm and 4.0 cm. What is the electric potential (relative to infinity) at the midpoint of the rectangle? (k = 1/40 = 9.0  109 N  m2/C2 )
 
  A) 1.3 MV
  B) 2.9 MV
  C) 3.5 MV
  D) 7.8 MV

[Dunkey]

Answer to Question 1

31 kg

Answer to Question 2

B

[gbarreiro]

TYSM

[frankwu0507]

Excellent