Efficiency 1. A man is researching energy saving light bulbs. One of the bulbs he is interested in is a 40W bulb
which uses 700) of electrical energy in a given time period during which it transfers 500J of light
energy. The remaining energy is wasted.
How much energy is wasted during this period of time?

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

70 give a real life example showing how sensory neurons work with the motor neurons

Select the best definition for wavelength. the height of an oscillating electromagnetic wave the rate at which electromagnetic waves oscillate. the distance between two crests of an electromagnetic wave. the oscillations of electric and magnetic fields select the best definition for frequency. the oscillations of electric and magnetic fields. the height of an oscillating electromagnetic wave. the distance between two crests of an electromagnetic wave. the rate at which electromagnetic waves oscillate