You could measure distance with metric ruler is it true or false

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

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

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by