Topic: Science Grab Bag

How does virtual reality work?

A broad definition says virtual reality is the idea of combining the physical world and the artificial world in such a way that the two are indistinguishable. How could technology provide all of the sensory sensations or different ways that people see, feel and hear the world such that the artificial and physical are blended together?

How do temperature and wind affect traffic noise?

In terms of temperature, sound waves move faster in warm air and slower in cold air. So as sound moves through the atmosphere, some parts of the wave will be moving faster than the rest.

Why do some logs float and some sink?

Whether an object floats or sinks in water is determined by the ratio of its weight compared to its volume. If an object of a certain volume weighs more than an equal volume of water, it sinks because the water can’t hold it up. If an object weighs less than an equal volume of water, it floats because the water can support its weight.

What are bacteria?

Bacteria are amazing single-celled, simple organisms. They’re found everywhere on the planet in all sorts of environments from your gut to the soil to the Arctic and Antarctic.

What determines the melting or boiling point of a substance?

Before we can answer that question, we need to know first: What is a solid? What’s a liquid? What’s a gas?