1. Use vector arrows to represent the velocity of a car that travels north at 50 mi/h and then travels east at 25 mi/h. 2. Another car travels northwest for 2 hours and covers a distance of 90 miles. What is the average velocity of the car?

heat the gas and measure the pressure

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

conduction, convection, radiation