BrainOrbit

WHY DOES ICE MELT FASTER ON METAL THAN ON PLASTIC?

Let me ask you a question.

Imagine you place two ice cubes on a table.

One is sitting on a metal tray.

The other is sitting on a plastic tray.

A few minutes later, you notice something interesting.

The ice on the metal tray is melting much faster.

Why?

After all, both ice cubes started at the same time.

Both are in the same room.

So what is the difference?

This is where Physics gets interesting.

Metal is a very good conductor of heat.

That means it can transfer heat quickly from the surroundings to the ice.

Plastic, on the other hand, is a poor conductor of heat.

It does not transfer heat as easily.

So the ice sitting on the metal receives heat faster and melts more quickly.

Now think about this:

Why are cooking pots usually made of metal and not plastic?

Why do metal spoons become hot in a cup of tea while wooden spoons stay cooler?

The answer is the same concept: heat transfer.

So tell me:

If you had to keep an ice cube from melting for as long as possible, would you place it on metal, plastic, or something else?

I'd love to hear your answers in the comments.

©️ Ifeyinwa Okocha-Eze(Physics Teacher)

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Happy Children’s Day to every child out there — the dreamers, the curious minds, the future leaders and the little lights that make the world brighter.

Children are gifts that remind us of innocence, hope, joy and endless possibilities. Every smile they wear carries a future waiting to unfold. Every question they ask carries a mind ready to learn and grow.

As we celebrate today, may we never forget that children need more than food and shelter — they need love, guidance, patience, encouragement, and a safe environment to become the best version of themselves.

To every child: your voice matters, your dreams are valid,
and your future is important.

May we raise children who are confident, kind, wise and fearless enough to change the world.

Happy Children’s Day!

The amplitude of a sound wave determines its ---- ------
(a) frequency (b) quality (c) loudness (d) pitch

A lens that is thinner at the middle and thicker at the edges is called -----------

PRACTICE QUESTION

1. If a 60° glass prism has a refractive index of 1.5. What is the angle of minimum deviation?

Solve number 2 question

2. A 60° prism of refractive index is 1.8. What is the minimum angle of deviation?

Many students think SOUND ENERGY and SOUND WAVES mean the same thing.

They are related — but different.

Sound energy is the energy produced when something vibrates.

Sound waves are the movements that carry that sound through air, water, or solids.

Simple example:

When you beat a drum:

- The energy produced is SOUND ENERGY.
- The vibrations moving through the air to your ears are SOUND WAVES.

Think about throwing a stone into water:

- The force from your hand is like sound energy.
- The ripples spreading across the water are like sound waves.

One produces the sound.
The other carries it.

This is why understanding Physics becomes easier when you connect it to everyday life.