We looked at rotational moment and the moment of inertial as well as some connected ideas. The Greek letter omega stands for angular velocity, alpha stands for angular acceleration. Capital L stands …

## “A 2 kg ball is dropped from 25 m up. How fast is it going 5 meter above the ground, no air friction?”

One way to approach the problem is to use conservation of energy. Part of the gravitational potential energy is converted to kinetic energy. Given the directions, we can assume conversation of …

## “How many US gallons of water are in one metric ton?”

You can input this question directly in Google verbatim and it will output your answer. Google has not always been able to do this, but it has been able to do this for at least a few years. I could …

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## “How do you calculate the volume of a liquid? What’s the unit of measurement?”

Volume is basically the three dimensional space that something fills. So you can place the liquid in a container with standardized markings. Volume can change based on temperature and pressure …

## How are Decibels Measured?

You would need a device to measure the intensity of the sound. Intensity is the power divided by area, it's similar conceptually to pressure. Once you have the intensity, you would use an equation …

## A Song of Ice and Steam

0.6 kg of ice at zero degrees Celsius. 0.2 kg of steam at 100 degrees Celsius. What will the final temperature be? Using the latent heat of fusion, the latent heat of vaporization, and the specific …