What is the luminosity of a 2-solar-mass main-sequence star compared to the sun? 2 0.14 1.414 11.3?

15. Ionic bonds result when electrons are between adjacent atoms (ions). a. shared b. lost c. transferred (exchanged) d. stretched and bounced

Three words that best describe what earth looks from space

What big geographic problem does lesotho face?

What is the circumference of the circle of a diameter of 2m

Which of the following patterns would you observe if you started at sea level and traveled upward through the Earth's atmosphere to an elevation of 100 km? Choose one or more: A. a progressive decrease in temperature B. decreasing pressure C.

In which direction does the Sun appear to move across the sky? Ofrom west to east from east to west from north to south from south to north

What is a planetary nebula neither a planet nor a nebula?

Which of the systems below is not true about atmospheric circulation patterns

What will happen when the stars go out

Which of the following is not a correct statement of ideas from the theory of plate tectonics? A. Earth's crust is broken into plates. B. Most earthquakes occurr at plate boundaries. C. Plates are destroyed at subduction zones. D.