Andrea, una velocista de 63.0 kg, comienza una carrera con una aceleración de 4.200 m/s2. ¿Cuál es la fuerza externa neta sobre ella? Si el velocista del problema anterior acelera a esa velocidad durante 20.00 m y luego mantiene esa velocidad durante el resto de una carrera de 100.00 m, ¿cuál será su tiempo para la carrera?

Does current flow through or across a resistor?

1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light

With physics question #5? for any !