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## = 4200 kgP1K-l) and dT the

, where P is the energy lossltime or 'power loss' (W), c, is the volumetric

Now consider the energy used by domestic appliances. Complete the following table:

How do you account for any differences in your estimated values and billed values?

Appendix 4 Doppler effect The Doppler effect is concerned with the apparent change in frequency that results from the relative motion between a source and an observer. This implies that:

l either the source is moving towards and then receding from a stationary observer or 2 the observer is moving towards and then receding from a stationary source or 3 both observer and source are moving towards or receding from one another.