A1200-kg car pushes a 2100-kg truck that has a dead battery to the right. when the driver steps on the accelerator, the drive wheels of the car push against the ground with a force of 4500 n.

what is the magnitude fct of the force that the car exerts on the truck? use the coordinate system shown in parts c and d, where the positive y direction is upward, and the positive x direction is to the right, the direction in which f⃗ ct points. express your answer in newtons to two significant figures.

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !

Does heating a metal wire increase or decrease its electrical resistance? why?