The various different parts of a cell, called organelles, are beneficial to the cell in what way?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j ?

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest