what is the magnitude fcont of the force that the car exerts on the truck? use the coordinate system shown in part b, where upward is the positive y direction and to the right, the direction f⃗ cont points, is the positive x direction.

What percentage of the earth's water is available for use by living things?

17 a tourist was planning a trip by car for travelling at some constant speed for 2.5 hours. however, he found that if he increases the speed by 20 km/h he can cover the same distance in 30 minutes less time than it was planned. what was the planned speed of the tourist, in km/h?

Scientists observed a rock stratum with fossil. if mollusks evolved before arthropod, where will their fossils be found.