An ideal spring of negligible mass is 13.00 cm long when nothing is attached to it. when you hang a 3.00-kg weight from it, you measure its length to be 14.50 cm . if you wanted to store 10.0 j of potential energy in this spring, what would be its total length? assume that it continues to obey hooke's law. express your answer numerically. if there is more than one answer, enter each answer, separated by a comma.

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Carbon 14 is a naturally occurring stable