You can’t hear the bell as you have created a partial vacuum inside the bottle. Without the air in the bottle, the sound is...

Enrichment Activity 5-11 11-14

The two identical bottles vibrate at the same natural frequency. So when one vibrates and produces a note, this makes the...

Enrichment Activity 5-11 11-14

As the been swinger moves through the air, the rubber band starts to vibrate. The card amplifies the sound so that you can...

Enrichment Activity 5-11 11-14

The flat sheet of newspaper has a large enough area so that the downward force of the atmosphere counters the upward force...

Enrichment Activity 5-11 11-14

Water molecules are strongly attracted to each other, creating a surface tension that allows the water to bulge over the top...

Enrichment Activity 5-11 11-14

Water in the kitchen paper evaporates, taking heat from the water in the bottle and cooling it. Any breeze speeds up the...

Enrichment Activity 5-11 11-14

Clouds form when warm, moist air cools and the water condenses into droplets. But droplets need a surface on which to form. In...

Enrichment Activity 5-11 11-14

After about 20 mins the juice and the water will have swapped places because water is less dense than sugary fruit juice.

Enrichment Activity 5-11 11-14

The refractive index of Pyrex® glass is the same as that for vegetable oil so as light passes through the glass of both bowls...

Enrichment Activity 5-11 11-14

The bottom coil of the slinky remains stationary until the top coils reach it and then the whole slinky drops to the floor...

Enrichment Activity 5-11 11-14

Rubbing the balloon makes it negatively charged and both the salt and pepper are attracted to it. However, the pepper grains...

Enrichment Activity 5-11 11-14

The coin reappears because the water bends, or refracts, the light travelling from the coin so that it can now reach your eye.

Enrichment Activity 5-11 11-14