A space vehicle is orbiting Earth in a circular orbit with a radius of 10,300,000 m
What is the minimum increase in speed that is needed for the vehicle to escape Earth's gravitational field? The mass of Earth is 5.97 × 1024 kg and G = 6.67 x 10-11 N•m2/kg2.
A) 6220 m/s
B) 2580 m/s
C) 3110 m/s
D) 2840 m/s
E) 7440 m/s
B
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Talk-radio station KOOK is at approximately 90 megahertz on the radio dial. This means that KOOK broadcasts
A) an electromagnetic wave whose frequency is 90 vibrations/second. B) an electromagnetic wave whose frequency is 90 × 106 vibrations/second. C) an electromagnetic wave whose wavelength is 90 × 106 vibrations per second. D) a sound wave whose frequency is 90 × 106 vibrations/second. E) a sound wave whose frequency is 90 vibrations/second.
The early Solvay Conferences had a great effect upon the development of quantum mechanics
a. True b. False Indicate whether the statement is true or false
A temperature difference of 5 K is equal to
a. a difference of 9 on the Celsius scale. b. a difference of 9 on the Fahrenheit scale. c. a difference of 2.8 on the Rankine scale. d. a difference of .5 on the Fahrenheit scale. e. a difference of 2.8 on the Celsius scale.
If three identical bulbs are connected in series across a 12V battery, the voltage across each bulb will be
a. 12V b. 4V c. different d. none of the above