How long have us been attempting space travel?

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m

Notice how they put future which of the clouds shown would indicate a possible future rain storm? a) b) c) d)