Complete the following two statements regarding quantum-mechanical concepts associated with the bohr model of the atom and refinements that resulted from the wave- mechanical atomic model.

two important quantum-mechanical concepts associated with the bohr model of the atom are that eledtrons are particles moving in orbitals, and electron energy is quantized into

two important refinements resulting from the wave-mechanical atomic model are that the electron position is described in terms of a and electron energy is quantized into both shells and subshells--each electron is characterized by quantum numbers.

Um vetor representa um deslocamento cujo módulo é 20 m. se v faz um ângulo de 60 graus com a horizontal, qual é o valor das componentes horizontal e vertical deste vetor?

Search coils and credit cards. one practical way to measure magnetic field strength uses a small, closely wound coil called a search coil. the coil is initially held with its plane perpendicular to a magnetic field. the coil is then either quickly rotated a quarter-turn about a diameter or quickly pulled out of the field. (a) derive the equation relating the total charge q that flows through a search coil to the magnetic-field magnitude b. the search coil has n turns, each with area a, and the flux through the coil is decreased from its initial maximum value to zero in a time ∆t. the resistance of the coil is r, and the total charge is q = i∆t, where i is the average current induced by the change in flux. (b) in a credit card reader, the magnetic strip on the back of a credit card is rapidly “swiped” past a coil within the reader. explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip. (c) is it necessary that the credit card be “swiped” through the reader at exactly the right speed? why or why not?

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?