What are anticlines and synclines? a. they are types of folds created by compressional stresses b. they are folds in rock that are created by tension stresses c. they are types of faults created by tension stresses d. they are types of faults caused by compressional stresses

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .