describe how you could make the following measurements and discuss any problems you might encounter
a) finding the volume of a rugby ball
b) finding the diameter of tennis ball.
c) findin the mass of a grain of sugar
a) submerge it in water in a graduated container and find its volume by amount the water rises in the container. (law of displacement)
b) measure its circumfrence by wrapping a string around it and then measure the string. Next divide this measured length by pi (3.14)
c)Place it on a very accurate small metric scale
a) To find the volume of a rugby ball, you can use the method of displacement. Start by getting a graduated container and filling it with water. Note the water level. Then, carefully submerge the rugby ball into the water without causing any water to overflow. As the ball displaces the water, the water level will rise. Measure the new water level and subtract the initial water level. The difference in water levels represents the volume of the rugby ball.
One potential problem you might encounter is getting an accurate measurement of the water level. It requires precision and care to ensure that the water level is correctly noted before and after the ball's submersion. Any errors in reading the volumes can lead to inaccurate results.
b) Determining the diameter of a tennis ball can be done by measuring its circumference. Start by taking a string, such as a thread or piece of flexible tape, and wrap it tightly around the widest part of the tennis ball. Ensure that the string is fully wrapped around and does not overlap itself. Once you have completely wrapped the string around the ball, mark the point where the two ends meet. Then, straighten out the string and measure the distance between the two marked points using a ruler or a measuring tape. This measured length represents the circumference of the tennis ball.
To find the diameter, divide the circumference you measured by pi (approximately 3.14). This calculation will give you the diameter.
One problem you might encounter is ensuring that the string is tightly wrapped around the ball without any slack or overlap. Any inaccuracies in measuring the circumference can lead to errors in the diameter calculation.
c) To find the mass of a grain of sugar, you can use a small and accurate metric scale. Place the grain of sugar gently onto the scale and observe the reading displayed. Make sure the scale is zeroed before placing the grain on it to ensure accurate measurement.
One potential problem you might encounter is the sensitivity of the scale. Some scales might have a limited range or may not be able to accurately measure very small masses. In this case, you may need to use a more specialized scale or consider measuring multiple grains together to obtain a measurable result. Additionally, the grain of sugar needs to be placed accurately and gently on the scale to avoid any potential errors caused by force or displacement.