Reset the phet simulation (using the button in the lower right) and set it up in the following manner: select oscillate, select no end, and use the parameters in parentheses by sliding the bars for amplitude (1.00 cm), frequency (2.00 hz ), damping (none), and tension (highest). using the available rulers, calculate the frequency of a photon that corresponds to the wavelength of the resulting wave. assume the length with units (cm) of the ruler represents the real photon wavelength and that the speed of light is 3.00×108 m/s.

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.