What is the difference in length between the longest ski trail and the shortest ski trail?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air