Physics

• the formula for density is: $p=$$m/v$
• volume of a cylinder is $π(r^2h)$
• Energy cannot be created or destroyed it can only change form
• Efficiency= useful energy out/ total energy in ×100%
• Pressure= force/area
• In fluids pressure= depth×density×gravitational field strength
• Pressure acts from all directions.
• Pressure acts more with depth