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
Question 2
An object is released from rest when it is a height h above the surface of a planet of mass M and radius R. What is the speed of the object just before striking the surface of the planet? Neglect any air resistance. Let h = 4.0 106 m, R = 5.0 106 m, and M = 4.0 1024 kg.
a. 7.8 km/s
b. 3.5 km/s
c. 5.4 km/s
d. 6.9 km/s
e. 4.8 km/s
Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
End of last glacial period
Mixing alcohol with caffeinated energy drinks can have dangerous consequences
Producer acquiring energy and nutrients from the environment
Humans are related to Earth’s other organisms
Energy homeostasis is regulated primarily by the brain, gastrointestinal tract, other organ systems,