Properties of Matter – 1R00.00 Hooke’s Law – 1R10.00 Stretching a Spring – 1R10.10 Tensile and Compressive Stress – 1R20.00 Shear Stress – 1R30.00 Shear Strain with a Foam Block – 1R30.20 Coefficient of Restitution – 1R40.00 Happy and Sad Balls – 1R40.30 Crystal Structure – 1R50.00