An airplane is flying on a course of 45° at 400 mph. A 70 mph wind coming from the east. What is the bearing of the plane? A. 36.9 degrees
B. 57 degrees
C. 37 degrees

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?