Zoë sees Elmo skateboarding to her right at 0.75 c. Elmo takes a standard meterstick (i. e., rest length of 1 m), and throws it to his right. Elmo determines that the meterstick is moving at 0.5 c with respect to Elmo. What lengths do Elmo and Zoë measure for the meterstick? Justify your reasoning.

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions

Avehicle accelerates from 0 to 30 m/s in 10 seconds on a straight road