The solar corona produces a lot more X-rays than it does visible light
Indicate whether the statement is true or false
TRUE
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As frequency is varied in an RLC series circuit, resonance is reached when
A. the voltages VR, VL and VC all become equal. B. the voltages VL and VC become zero. C. the voltage VR becomes equal to the source voltage. D. None of the choices are correct.
A 777 aircraft has a mass of 300,000 kg. At a certain instant during its landing, its speed is 27.0 m/s. If the braking force is 435,000 N, how much further does it travel along the runway before it comes to a stop?
A) 40.5 m B) 142 m C) 181 m D) 251 m E) 456 m
The bottom of the stratosphere is called the
a. stratopause. b. tropopause. c. mesopause. d. thermopause.
Which of the following terms is given to a pair of stars that appear to change positions in the sky, indicating that they are orbiting one another?
A) visual binary B) eclipsing binary C) spectroscopic binary D) double star E) none of the above