A student performs a lab using an ultrasonic probe to measure the distance to a wall located some distance away. If the air temperature is 25°C and the sound signal
returns 3.0 s after it was sent, how far away is the wall? Show all work using GRASS
and round your answer to the correct number of significant digits.

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up

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.

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;