When conducting an experiment, which of the following is generally true? A.

It is unsafe to perform a large number of experimental trials.

B.

Performing a smaller number of experimental trials makes the results more dependable.

C.

The number of trials performed does not affect the validity of the results.

D.

Performing a larger number of experimental trials makes the results more dependable. (no links)

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 answer is: metamorphic rocks often show the presence of fossils, also a

hope i

-lavira: )