Question: Physics help 13. A 40 W light bulb was left on in a house for 32 hours. It costs $2/GJ to have this light on.

Physics help

13. A 40 W light bulb was left on in a house for 32 hours. It costs $2/GJ to have this light on. How much does this end up costing at the end of 32 hours? 14. By what factor would the field strength between 2 charged objects change if they were moved to one fifth of their original separation? 15. The current created by a 40 W bulb running at 4.22 0. is A. 16. A motor neuron had an effective potential difference of 70.0 mV. The influx of sodium ions generated a current of 3.60 mA. The effective resistance of the neural membrane was

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