The strength of an earthquake can be measured by a scale, while the after effects or damage from an earthquake is measured by a scale.

The first answer is the Ritcher scale and the second is the Mercalli scale or howeve you spell it

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation: