Consider a neutral atom with 30 protons and 34 neutrons. the atomic number of the element is 30 32 34 64 94

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

What best discribes the relationship between wavelength and frequency in a electromagnetic wave

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.