Well, first of all, it has to be a circle or a sphere, otherwise it's perimeter, not circumference. But if your object is a circle or a sphere, the formula is C=pi x diameter. So the circumference of your object is 5pi
apparent diameter
The diameter of 5 mm is simply 5 mm. It is a measure of the distance across a circle or sphere, passing through its center. Therefore, any object or circle described as having a diameter of 5 mm will have that exact measurement across its widest point.
The diameter by definition because a diameter of a given object is twice its radius.
The diameter of an object is the distance across it, passing through the center. If an object has a diameter of 9.8 cm, it means that the straight line measurement from one side of the object to the other, through the center, is 9.8 cm. This measurement is already provided as the diameter itself.
To show the diameter of an object, measure the distance across the object through its center using a ruler or caliper. Ensure that the measuring tool is aligned straight across the widest part of the object. For circular objects, you can also use a string to measure around the circumference and then calculate the diameter using the formula: diameter = circumference/π. Finally, visually indicate the diameter by marking the endpoints on the object or using a diagram.
apparent diameter
nominal diameter is the original diameter of an object
The diameter of 5 mm is simply 5 mm. It is a measure of the distance across a circle or sphere, passing through its center. Therefore, any object or circle described as having a diameter of 5 mm will have that exact measurement across its widest point.
The diameter is the height: the tip to the toe of an object.
The diameter by definition because a diameter of a given object is twice its radius.
The diameter of an object is the distance across it, passing through the center. If an object has a diameter of 9.8 cm, it means that the straight line measurement from one side of the object to the other, through the center, is 9.8 cm. This measurement is already provided as the diameter itself.
To show the diameter of an object, measure the distance across the object through its center using a ruler or caliper. Ensure that the measuring tool is aligned straight across the widest part of the object. For circular objects, you can also use a string to measure around the circumference and then calculate the diameter using the formula: diameter = circumference/π. Finally, visually indicate the diameter by marking the endpoints on the object or using a diagram.
diameter = 5/pi
I don't believe there is a way to find the mass of an object knowing only the diameter of the object. If you had the volume, or some other measurements sure. the best bet would be just to weigh it, or find the volume using the principles of displacement.
-- In the absence of air resistance, the object's diameter has no effect at all on the projectile motion. -- In the presence of air resistance, one has to know everything about the object AND the air in order to have a prayer of calculating the effect.
Half the diameter
diameter = 5/pi