Since the expansion of international trade, Dutch elm disease and chestnut blight have nearly killed off the Dutch elm and chestnut trees in America. One might infer that these diseases were the result of .

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

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Madison pushes with a 210-n horizontal force on a 24-kg crate of coffee resting on a warehouse floor. the force of friction on the crate is 74 n. what is the acceleration?