Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to calculate modulus [title] Note that material stress is caused by axial stretching force. [step] For example, pulling straight out on a piece of taffy will stretch the taffy due to applied stress. [title] Understand that material strain is caused by shearing force perpendicular to the axis of the material.

Ending1: [step] The source of the strain is magnetic radio waves which are scattered in wide variety over the surface of the material. [substeps] This presence both binds the material poses and attaches it to the magnet field in electronic x rays. Ending2: [step] This is the largest resistance force and it is involved in shearing much larger industrial loads. [title] Pay attention to how your cow socks the plank of protein if using frozen solid protein filets. Ending3: [step] For example, a group of loudspeakers circuit the material at the same intersection with the material. When shearing using force, a group of speakers circuit the material at the same intersection of the material. Ending4: [step] For example, pushing on the middle of a tennis racket string will bend the string due to applied strain. [title] Measure the proportional fractional volume change (also known as dilation) of the material.

Answer format: ending1/ending2/ending3/ending4