1. Homework Statement
A dam is made which is rectangular and flat in profile. It is a depth of 25m and a width of 100m and holds back fresh water which has a density of 1000 kg m3 .
What is the total force that the water exerts on the dam?
2. Homework Equations
F=ρA
|dF|=pdA
d/dz p=-ρg
3...
1. Homework Statement
An object has a density of 1250 kg /m3 at 10◦C and a coefficient of linear expansion of α = 2.5 × 10−5 1 /K . What is the object’s density when the temperature is 25◦C?
2. Homework Equations
V=βV0ΔT
V(T)=(1+β(Δt))V0
3. The Attempt at a Solution
How I got the answer...
A 5.0 kg cube of metal has a density of 3000 kg m3 and is held by a vertical string while immersed in water which has a density of 1000 kg m3 . Assume that the cube is oriented so that all the faces are either vertical or horizontal.
1. What is the difference in pressure between the top of the...
An object has a density of 1250 kg m3 at 10◦C and a coefficient of linear expansion of α = 2.5 × 10−5 1 /K . What is the object’s density when the temperature is 25◦C?
I have tried using the equation ΔL=αL° ΔT but this equation has nothing to do with density.
the answer should be: 1248.6
Your...