# 22. A computer is left on all week. It continually consumes 15 W of power. Electricity...

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22. A computer is left on all week. It continually consumes 15 W of power. Electricity costs 10 cents per kW-hr. How much does this cost? a. 25 cents b. 36 cents $2.52 d.$15.12 23. An electron and a proton are 1.0x10 m. apart. Calculate the force between them in Newtons, and whether it's attractive or repulsive: a. 2.3x10- N, repulsive b. 2.3x10-20 N, attractive c2.3x10-2 N, repulsive d. 2.3x10-25 N, attractive Which of the following differs from the others with respect to electricity a. plastic b. iron cglass d. ceramic 24. 25. A magnetic field is produced by a.static negative charges b. static positive charges c. flowing water d. an electric current

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