The stiffness of a particular spring is 680 n/m. one end of the spring is attached to a wall. when you pull on the other end of the spring and hold it stretched with a steady force of 133 n, the spring elongates to a total length of 57 cm. what was the relaxed length of the spring? (remember to convert to s. i. units.)

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.

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j

Which lists the organs in the correct order as food passes from the mouth to anus?