The formula for calculating the volume of an object that weighs 200N more in air than in water is: V = (W - B)/ρ, where V is the volume, W is the weight in air, B is the weight in water, and ρ is the density of water.
To measure the weight of an object in air, you can use a scale. To measure the weight of an object in water, you can use a spring scale or a balance scale with a known weight on one side and the object on the other side.
An object weighs more in air than in water because water exerts an upward buoyant force on the object, which reduces its effective weight. The difference in weight is equal to the weight of the water displaced by the object.
The density of an object does not affect its weight in air, but it does affect its weight in water. Objects with higher densities will weigh more in water because they displace more water and experience a greater buoyant force.
Yes, the volume of an object can change in different environments, particularly when there is a change in temperature or pressure. For example, a balloon will expand in volume when placed in a warmer environment, and a submarine will decrease in volume as it descends to deeper depths with increasing pressure.