To test orthopedic materials, two rods of the same dimensions are subjected to identical compressive forces on their ends. One rod is made of stainless steel (Y = 180 X 109 Pa), the other is made of titanium alloy (Y = 110 X 109 Pa). Which rod undergoes the greatest change in length?

A. Stainless steel rod
B. Titanium alloy rod
C. Same for both

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.

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?