Technician A says that maintenance-free batteries use a large amount of water. Technician B says that maintenance-free batteries use materials that reduce the amount of water used by the battery. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
B
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The ____ changes the DC bus power to a controlled frequency AC on the output.
a. inverter b. dc bus c. rectifier d. control and regulation
An increased downside with a(n) ________ leads to a(n) ________
A. fixed venture value; increased upside B. fixed venture value; decreased upside C. increasing upside; decreased venture value D. fixed upside; increased venture value
A chemist made six independent measurements of the sublimation point of carbon dioxide (the temperature at which it changes to dry ice). She obtained a sample mean of 196.64 K with a standard deviation of 0.68 K.
a. Use the Student’s t distribution to find a 95% confidence interval for the sublimation point of carbon dioxide. b. Use the Student’s t distribution to find a 98% confidence interval for the sublimation point of carbon dioxide. c. If the six measurements had been 196.35, 196.32, 196.4 198.02, 196.36, 196.39, would the confidence intervals above be valid? Explain.
A voltage meter measures a 100 V conductor at 100 V with no tolerance. What can we tell about the voltage meter?
A) It is slightly accurate. B) It has a narrow range. C) It is highly accurate. D) It needs recalibration.