4. A wind turbine is 30% efficient. This means that only 30% of the kinetic energy from the wind is turned into electricity. What happens to the other 70% of the energy?

Which changes of state do the labels represent? a: b: c:

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents