Are bevs or hydrogen fuel cell vehicles a more promising transportation technology for the future? (this is question #3 from p. 608.) should car companies be required to produce electric cars?

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

What is the measure of a change in an objects velocity?

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?