Easy

which of the following electrons absorbs the most energy?

an electron moving 1 energy level farther from the nucleus
an electron moving 2 energy levels closer to the nucleus
an electron moving 2 energy levels farther from the nucleus
an electron moving 1 energy level closer to the nucleus

Ten students stand in a circle and are told to make a transverse wave. what best describes the motion of the students? each student bumps the shoulder of his or her neighbor. at the exact time, all students take a step to the right. the students skip clockwise, going in a circular motion. one at a time, each student lifts his or her hands up and then down.

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.