Before moving on, make sure you can answer these questions. If you have trouble, read the feedback and review the lesson material before moving on. Reference the chart for any densities that you need to solve the problems.
| Substance | Density (kg/m3) |
|---|---|
| Water | 997 |
| Gasoline | 737 |
| Hydrogen | 0.0899 |
| Air | 1.29 |
| Iron | 7.86 x 103 |
| Mercury | 1.36 x 104 |
| Gold | 1.93 x 104 |
Which of the following would float in water?
- Gold
- Gasoline
- Mercury
- Iron
Remember, to float in water, the substance has to have less density than water.
Remember, to float in water, the substance has to have less density than water.
Remember, to float in water, the substance has to have less density than water.
Remember, to float in water, the substance has to have less density than water.
What is the water pressure exerted on a person who has dived into a tank of water and is at a depth of 225 meters?
- 1.63 x 106 N/m2
- 2.48 x 106 N/m2
- 8.48 x 106 N/m2
- 2.20 x 106 N/m2
Use \(\mathsf{ P = \rho gh }\) to solve for pressure.
Use \(\mathsf{ P = \rho gh }\) to solve for pressure.
Use \(\mathsf{ P = \rho gh }\) to solve for pressure.
Use \(\mathsf{ P = \rho gh }\) to solve for pressure.
A piece of iron submerged in water displaces 0.754 L of water. What is the buoyant force on the iron?
- 7.38 N
- 7.38 x 10-3 N
- 7.38 x 102 N
- 7.38 x 103 N
First, convert liters to cubic meters. Then, use \(\mathsf{ F_{buoyant} = \rho V_f g }\) to solve for the buoyant force.
First, convert liters to cubic meters. Then, use \(\mathsf{ F_{buoyant} = \rho V_f g }\) to solve for the buoyant force.
First, convert liters to cubic meters. Then, use \(\mathsf{ F_{buoyant} = \rho V_f g }\) to solve for the buoyant force.
First, convert liters to cubic meters. Then, use \(\mathsf{ F_{buoyant} = \rho V_f g }\) to solve for the buoyant force.
An object that weights 125 N on land is placed in the water. It's apparent weight is 103 N. What is the buoyant force acting on the object?
- 0 N
- 22 N
- 89 N
- 228 N
Use \(\mathsf{ F_{buoyant} = F_g - F_{aw} }\) to find the buoyant force.
Use \(\mathsf{ F_{buoyant} = F_g - F_{aw} }\) to find the buoyant force.
Use \(\mathsf{ F_{buoyant} = F_g - F_{aw} }\) to find the buoyant force.
Use \(\mathsf{ F_{buoyant} = F_g - F_{aw} }\) to find the buoyant force.
An object displaces fluid that weighs 1.25 N. What is the buoyant force acting on that object?
- 0.00 N
- 0.75 N
- 1.25 N
- 2.50 N
Archimedes' Principle states that the buoyant force of an object submerged is equal to the weight of the liquid it displaces.
Archimedes' Principle states that the buoyant force of an object submerged is equal to the weight of the liquid it displaces.
Archimedes' Principle states that the buoyant force of an object submerged is equal to the weight of the liquid it displaces.
Archimedes' Principle states that the buoyant force of an object submerged is equal to the weight of the liquid it displaces.
Summary
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