A25 kg circular disk has a diameter of 2.5 feet and a thickness of 2.5 cm. find the density of the disk in kg/m3. next, find the weight of the object. then calculate the buoyant force on the disk if it is submerged under water. finally, will the object sink or float?

Assume that ; .

Density of the disk: approximately .

Weight of the disk: approximately .

Buoyant force on the disk if it is submerged under water: approximately .

The disk will sink when placed in water.

Explanation:

Convert the dimensions of this disk to SI units:

The radius of a circle is 1/2 its diameter:

.

Volume of this disk:

.

Density of this disk:

.

indicates that the disk will sink when placed in water.

Weight of the object:

.

The buoyant force on an object in water is equal to the weight of water that this object displaces. When this disk is submerged under water, it will displace approximately of water. The buoyant force on the disk will be:

.

The size of this disk's weight is greater than the size of the buoyant force on it when submerged under water. As a result, the disk will sink when placed in water.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.