A 10. kg book bag is dropped from a height of 2.0 m. The speed of the book just before it hits the floor is A. 9.8 m/s B. 6.3 m/s C. 0 m/s D. 49 m/s

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? 1. write the equation 2.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

If the radius of curvature of the cornea is 0.75 cm when the eye is focusing on an object 36.0 cm from the cornea vertex and the indexes of refraction are as described before, what is the distance from the cornea vertex to the retina? express your answer to two significant

Which planet do you think would be easiest for humans to colonize some day?