If you are measuring 25 mL of liquid in a beaker that is graduated every 1 mL, the measured volume would be
1 answer:
Answer:
Explanation:
We are told that the volume of liquid measured is
However, we also know that the beaker is graduated every 1 mL. This means that the sensitivity of the instrument is
This means that we cannot measure the volume of the liquid with a precision better than this value. So, the actual measurement of the liquid volume is
Or, written as interval,
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Complete question:
A solid disk rotates in the horizontal plane at an angular velocity of 0.067 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.18 kg.m2. From above, sand is dropped straight down onto this rotating disk, so that a thin uniform ring of sand is formed at a distance of 0.40 m from the axis. The sand in the ring has a mass of 0.50 kg. After all the sand is in place, what is the angular velocity of the disk?
Answer:
The angular velocity of the disk is 0.0464 rad/s
Explanation:
Given;
initial angular velocity of disk, ωi = 0.067 rad/s
initial moment of inertia of the disk, I₁ = 0.18 kg.m²
radius of sand on the disk, R = 0.40 m
mass of sand, m = 0.50 kg
Initial angular momentum = Final angular momentum
Moment of inertia of sand ring = MR²
Therefore, the angular velocity of the disk is 0.0464 rad/s