Cube in water
Not what you're looking for?
Imagine that you have a solid cube composed of Material X. You put the cube into a beaker filled with water. The cube sinks to the bottom of the beaker and sits there, at rest, on the bottom.
Which of the following statements are true? (Give ALL correct answers: B, AC, BCD, ... , or None)
A) The buoyant force on the cube is less than its own weight
B) The cube displaces an amount of water less than its own volume
C) The cube of Material X weighs less than a cube of water the same size
D) The normal force exerted by the bottom of the beaker on the cube is greater than the weight (in air) of the cube
E) The substance must be more dense than water
Purchase this Solution
Solution Summary
This solution looks at density, volume and force calculations of a cube in water.
Solution Preview
Please see the attached file.
Answer: A and E are true.
There are two forces acting on the cube while it is going down.
The buoyant force = volume of cube * density of water (fluid displaced).
The force of gravity = volume of cube * density of the cube. This is equal to its weight.
When the cube gets to the bottom of the beaker there will be a third force acting on it: the normal force.
Since the cube ...
Purchase this Solution
Free BrainMass Quizzes
Variables in Science Experiments
How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.
Introduction to Nanotechnology/Nanomaterials
This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.
The Moon
Test your knowledge of moon phases and movement.
Classical Mechanics
This quiz is designed to test and improve your knowledge on Classical Mechanics.
Intro to the Physics Waves
Some short-answer questions involving the basic vocabulary of string, sound, and water waves.