An engine exhausts 1140 j of energy for every 3790 j of energy it takes in. what is its efficiency?

Avoltaic cell converts chemical energy to

What is the answer to these problems 30 pt

Auniform brick of length 25 m is placed overthe edge of a horizontal surface with a maximum overhang of 12.5 m attained withouttipping. now two identical uniform bricks of length25 m are stacked over the edge of a horizontalsurface. what maximum overhang is possible forthe two bricks (without tipping)? answer in units of m.