A rectangular box of negligible mass measures 5.0 m long, 1.0 m ...

[hubes95]

A rectangular box of negligible mass measures 5.0 m long, 1.0 m wide, and 0.50 m high. How many kilograms of material can be loaded onto the box before it sinks in a lake having water of density 1000 kg/m3?
 
  A) 0.50  103 kg
  B) 1.5  103 kg
  C) 2.5  103 kg
  D) 3.5  103 kg

Question 2

You use a spring scale to suspend an object. The spring scale reads 7.84 N when the object is in air and 6.86 N when the object is immersed in water of density 1000 kg/m3. What is the density of the object?
 
  A) 6000 kg/m3
  B) 7000 kg/m3
  C) 8000 kg/m3
  D) 9000 kg/m3

[macagnavarro]

Answer to Question 1

C

Answer to Question 2

C