Atrain 400 m long is moving on a straight track with a speed of 81.4 km/h. the engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 17.6 km/h. assuming constant acceleration, determine how long the train blocked the crossing. disregard the width of the crossing.

Acar moves at 12m/s and coasts up a hill with a uniform acceleration of -1.6m/s2. how far has it traveled after 6.0s?

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!

What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.