The overall energy efficiency of a typical automobile is closest to
A) 60%. B) 2%. C) 10%. D) 40%. E) 90%.
C
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During the past few million years, ice ages were MOST LIKELY caused by
A) changes in the distance from the Earth to the Sun B) small changes in the Earth's axis tilt and orbit C) changes in the heat released from the Earth D) changes in the energy output of the Sun
Which type of reflector telescope would be the easiest to construct, and why?
What will be an ideal response?
A radio wave transmits 4.8 W/m2 average power per unit area. What is the peak value of the associated magnetic field? (m0 = 4p × 10^-7 T×m/A and c = 3.00 × 10^8 m/s)
a. 1.0 × 10^-7 T c. 2.0 × 10^–7 T b. 8.4 × 10^-3 T d. 30 T
The two moons of Mars are known as ____________________ and ____________________
Fill in the blank(s) with correct word