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What's a Watt?

Break the beam
Break an infra-red beam with your hand. How many times can you do this in 10 seconds?

Giant Pliers
A giant set of pliers squeezes a giant spring.

How long is your hair?
Measure the length of one strand of your hair. Multiplying the length by 1.8 gives an estimate for the total

Measure this - laser lever
Measure four blocks which appear identical, with this measure which includes a long laser pointer.

Measure with Sound 1 - height
Use a simple ultrasonic 'tape measure' to measure heights.

Measure with Sound 2 - distance
Use a simple ultrasonic 'tape measure' to measure distance.

Powers of Ten - computer display
This computer display shows how we use powers of ten to write very big and very small units.

Standards display - metre, second, kilogram
This display explains how the standards for the metre, second and kilogram are defined.

Theodolite Height - height from angle
Use a simple theodolite to measure someone's height

What's a Watt?
Measure the current, voltage and power used by different mains light bulbs including a low-energy fluorescent lamp.

Wind Speed
What does it feel like when wind moves at 40 kilometres per hour?

Your body is the measurement - origins of measurements
With this exhibit, you can find out about these units by measuring your height in cubits, spans or hands.

 
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