Bethany has been working really hard to be able to do the splits. After several months of flexibility training, she can do the splits. Bethany then went on vacation with her family and stopped her flexibility training program. When she returned she could no longer do the splits. This is explained by which of the following principles? A. Individuality principle B. Specificity principle C. Reversibility principle D. Progression principle

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever

so easy. just google the electromagnetic waves and it’ll pop up.