( branliest to best answer): before dancing on a smooth wooden floor, ballet dancers sometimes sometimes put a sticky powered called rosin on their shoes soles. Why? what force are they taking advantage of?

Acustomer currently has a desktop pc which, among other things, has a 970 gaming atx am3 motherboard, with a pata hard drive that has 150 gb storage and 3600 rpm spindle speed. the customer is complaining that the pata hard drive is running out of storage and is slow. they indicate that they have a budget of $200 and would like this hard drive to last for the next few years. they have several videos and photos that they currently need to store, which will take up at least 100 gb. they anticipate the need to store at least 75 gb of data over the next few years.