Final answer:
To float a toy bear that weighs 350 grams, we can calculate the number of balloons needed using the buoyant force. The buoyant force is equal to the weight of the displaced fluid, which is air in this case. By dividing the weight of the bear by the buoyant force, we can find the number of balloons required.
Step-by-step explanation:
In order to calculate the number of balloons needed to float a toy bear, we need to consider the buoyant force acting on the bear.
The buoyant force is equal to the weight of the displaced fluid, which in this case is air. To determine the buoyant force, we can use the formula:
Buoyant force = weight of displaced fluid = volume of fluid x density of fluid x acceleration due to gravity
Since the bear weighs 350 grams, we can convert it to kilograms by dividing by 1000 (1 kg = 1000 g), so the weight of the bear is 0.35 kg.
We also need to know the density of air, which is approximately 1.2 kg/m^3.
Let's assume the volume of each balloon is 2 liters.
Now we can calculate the buoyant force:
Buoyant force = 2 L x 1.2 kg/m^3 x 9.8 m/s^2
Once you calculate the buoyant force, you can divide the weight of the bear by the buoyant force to find the number of balloons:
Number of balloons = weight of bear / buoyant force
For a more accurate calculation, you would need to consider the volume and density of each balloon as well.