A 20-solar-mass star will stay on the main sequence for 10 million years, yet its iron core can exist for only a
A) day. B) week. C) month. D) year. E) century.
A
You might also like to view...
Recyclables are more inconvenient for the consumer to deal with than throwaways
What will be an ideal response?
A block of wood slides to a stop along a tabletop. In this process,
A) energy is lost. B) both energy and energy quality remain unchanged but thermal energy is gained while kinetic energy is lost. C) energy remains unchanged but energy quality is lost. D) energy remains unchanged but energy quality is gained. E) both energy and energy quality remain unchanged but thermal energy is lost while kinetic energy is gained.
Match the moons listed to the left with the characteristics described in the sentences to the right. Drag words from the left to the blanks on the right. Each moon should be used only once.
Which of the following represent reasonable order-of-magnitude estimates for your age in seconds?
1. 109 s 2. 1011 s 3. 107 s 4. 105 s