A 100 million-year-old open cluster will no longer contain any O-type stars
Indicate whether the statement is true or false
TRUE
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Using Table 11.3, which of the following materials would you conclude have the greatest thermal conductivities?
1.metals
2.gases
3.nonmetals
4.gases and nonmetals
When a proton and an antiproton collide
a. they destroy each other and produce energy in the form of gamma rays. b. one of the protons is converted to a neutron and they form nucleus of one proton and one neutron. c. one of the protons is converted to an electron and they form a hydrogen atom. d. one proton is converted to a neutron and the other is converted to an electron. e. A proton and an antiproton can not collide because the Coulomb barrier is too great.
Why does the average chemical composition of stars now forming differ from that of older stars?
What will be an ideal response?
In the orbital plane of a binary star system matter can be transferred from one star to the other through the ___________, located directly between the two stars is the point where the Roche lobes meet
a. turnoff points b. horizontal branch c. Lagrangian points d. synchrotron points e. radiation belts