Two skaters, one with mass 50 kg and the other with mass 60 kg, stand on an ice rink holding a pole of length 15 m and negligible mass. Starting from the ends of the pole, the skaters pull themselves along the pole until they meet. How far does the 60 kg skater move

Which type of microscope would allow the viewer to see ribosomes inside a cell?

An object has a weight of 500 on earth what is the mass of this object

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.