What is the explanation for the fact that the desert sand is very hot in the day and very cool at night? 1. Sand reflects light very well. 2. Sand is a bad heat conductor.
3. Sand has a low specific heat compared to air

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

Newtons view of arrangement of the universe