Achild is playing at the beach. she pours an equal amount of sand into both a short, fat container and a tall, thin container. when asked which container holds more sand, the child points to the tall, thin container. this response suggests that she is most likely in the stage of cognitive development.

Rosa records the distance that a toy car rolls and the time it takes to cover the distance. what scientific practice is this? collecting data asking a question providing explanations communicating results

Which statement best describes how private industry decides where to spend the money on research and development

An electromagnetic wave with frequency 65.0 hz travels in aninsulating magnetic material that has dielectric constant 3.64 andrelative permeability 5.18 at this frequency. the electric fieldhas amplitude 7.20 \times 10^{ - 3} {\rm v}/{\rm m}. a. what is the speed of propagation of the wave? b.what is the wavelength of the wave? c.what is the amplitude of the magnetic field? d.what is the intensity of the wave?