Setting up linear equations for problems dealing with specific gravity.

AI Thread Summary
To solve for the gram-moles of lead (x) and tin (y) in the given problem, a system of equations based on mass and volume must be established. The total weight in air is 82 gram-moles, while the weight in oil, accounting for buoyancy, is 77 gram-moles. The specific gravities of lead and tin provide the necessary density values to relate mass and volume. A key equation involves the buoyant force, which can be expressed as the volume of the object multiplied by the density of the oil. Careful attention to algebraic calculations is essential to arrive at the correct values for x and y.
Agnostic
Messages
110
Reaction score
0
I can not, for the life of me, figure out how to set the following up into a system of equations.

An object composed of x gram-mole of lead (specific gravity 11) and y gram-mole of tin(specific gravity 7) weights 82 gram-moles in air and 77 gram-moles in oil of specific gravity of 1/2. Find x and y.

Finding x and y is simple, if I could figure out the right way to set it up...:(
 
Physics news on Phys.org
I would start with a statement of mass addition,
and a statement of volume addition.
The buoyant Force (5gram)g = V*(.5gram/cm^3)g
gives you a way to write the total Volume.
 
I still can't get it to come out to the correct answer...
 
"correct answer" might be wrong.
maybe youmade an algebra mistake...
what have you done so far?
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »

Similar threads

Calorimetry Lab Analysis (predict specific heat of unknown metal)
2
Replies
54
Views
8K
Age of radioactive sample, single variable equation.
Replies
4
Views
2K
Help finding specific heat of metal in calorimeter
Replies
3
Views
8K
Kinematics Problem: constant acceleration, motion in a line
Replies
6
Views
1K
Linear velocity equation for a object trown vertically up
Replies
1
Views
1K
I Boundary conditions for a stream function in a hydrodynamics problem
Replies
5
Views
771
Shear: What would be the equation for ''pure'' torque?
Replies
9
Views
2K
Nuclear Reactions, Can anyone check my solution?
Replies
1
Views
2K
Elastic Pendulum with Newton's equations of motion
Replies
3
Views
4K
MHB Basis for set of solutions for linear equation
Replies
6
Views
2K

Hot Threads

Recent Insights

Back
Top