When a solar flare occurs, how long does it take before a scientist sees it? (The Earth-Sun distance is 1.5 x 10^11 m and the speed of light is approximately 30 x 10^8 m/s.
a. 8 microseconds
b. 8 milliseconds
c. 8 seconds
d. 8 minutes
d. 8 minutes
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In his campaign for the presidency in 2000, George W. Bush promised to
A. pursue America's national interests without restraint from traditional U.S. allies. B. bring reconciliation after the sharp partisan divisions of the Clinton years. C. pursue hard right conservative policies regarding the environment and social welfare. D. protect the environment and try to stop global warming. E. balance the federal budget under all circumstances.
How are safety ratings for zeotropic refrigerants different than for compounds?
A) Zeotropic refrigerants are assigned a safety group classification based on the worst case of fractionation. B) Zeotropic refrigerants use the same rating system as all other refrigerants. C) They precede the normal letter and number with the letter Z for zeotropic. D) They follow the normal letter and number rating with the letter Z for zeotropic.
Which sensor might use an aspirator tube?
A) Inside vehicle temperature B) Outside air temperature C) Discharge air temperature D) Evaporator outlet temperature
Which of the following factors determine the synchronous speed of an AC motor?
A. inductance of the rotor windings B. the frequency of the applied voltage C. the number of field poles per phase D. the physical load driven by the motor E. both b and c