PLEASE HELP ASAP! :)) How many cells each of 1.2V e. m.f are needed to provide a 6.0 V
battery for a calculator?

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?

When solid surfaces slide over each other the kind of friction that occurs is called friction

Farmer a has a deep well and needs a lot of water for her animals and crops. her neighbor, farmer b, has a shallower well. he needs less water than farmer a because his farm is smaller. in years of drought, sometimes farmer b can't get any water from his wells. what can farmer b do to decrease the likelihood of his well running dry?