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jon.physics
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Homework Statement
Explain why a sharp knife cuts better than a dull knife
Homework Equations
None that i know of
The Attempt at a Solution
Not sure where to begin
1. The problem statement, all variable and given/known data
what happens to the density of air in a common rubber balloon when it is heated
2. Homework Equations
none that i know of
3. The Attempt at a Solution
not sure where to begin
1. The problem statement, all variable and given/known data
How does water pressure 1 meter beneath the suface of a lake compare with water pressure 1 meter below the surface of a swimming pool
2. Homework Equations
none that i know of
3. The Attempt at a Solution
not sure where to begin
1. The problem statement, all variable and given/known data
when an air bubble rises in water, what happens to its mass, volume, and density
2. Homework Equations
not sure
3. the attempt at a solution
not sure
I'm sorry but my professor has not been present for the past couple of weeks so I'm confused as to where to begin. This is my first semester taking physics ever and I'm having a difficult time understanding these word problems. any help would be great. thanks