A 50-kg satellite circles the Earth in an orbit with a period of 120 min. What minimum energy is required to change the orbit to another circular orbit with a period of 180 min? (Earth: radius = 6.4 × 106 m, mass = 6.0 × 1024 kg)
A. 2.9 × 108 J
B. 3.5 × 108 J
C. 4.1 × 108 J
D. 4.7 × 108 J
E. 5.9 × 108 J
Answer: A
You might also like to view...
Y dwarfs are substellar objects with temperature above 500 K
Indicate whether the statement is true or false
Solenoid: When you double the number of windings in an ideal solenoid while keeping all other parameters (radius, length and current) fixed, the magnetic field at the center of the solenoid will
A. double. B. triple. C. quadruple. D. be reduced by a factor of one-half. E. be reduced by a factor of one-fourth.
How can the Doppler method be used to estimate the average orbital distance of a planet's orbit?
A) by measuring the speed at which the star orbits the mutual center-of-mass of the star and planet, and using Newton's theory of gravity B) by measuring the time it takes for the star's line-of-sight velocity to cycle from peak to peak, and using Newton's version of Kepler's Third law C) by measuring the asymmetries in the velocity curve D) by measuring the amount by which the starlight is reduced when the planet transits
What are cosmic rays?
A) another name for gamma rays and X-rays B) fast moving dust particles in the interstellar medium C) subatomic particles that travel close to the speed of light D) lasers used as weapons by extraterrestrials