= 4200 kgP1K-l) and dT the

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.