Acapillary tube has the shape of a cylinder, so its volume can be determined using the formula for a cylinder's volume, v=πr^2h. you will measure the height, h, later. to find the radius, measure the diameter with a pair of calipers or ruler and divide by 2. record your answer to the nearest 0.1 cm. radius: __ cm

Hello!

Looking at the given ruler, we can see that the capillary tube's diameter starts at 0cm and goes to 0.4cm. That means that the diameter of this tube is 0.4 centimeters.

The problem has given us how to find the radius when we have a diameter, so we would need to divide it by 2.

0.4 cm / 2 = 0.2 cm

Therefore, the radius of the capillary tube is 0.2 centimeters.