1- cuando un número de crestas o de valles pasan por un lugar en una unidad de tiempo estamos hablando de: 2- ¿en que tipos de movimientos la velocidad cambio con el paso del tiempo? 3- ¿como se expresa matemáticamente la aceleración? 4- si un automóvil avanza 120 km/h, considerando que en un minuto recorre 2 km/ ¿cual es su aceleración? ¿que es necesario para poner en movimiento un cuerpo que está en reposo o para detenerlo cuando está en movimiento? ayudenme porfavor, no gracias

Current 1 of 8.4 a runs for 240 seconds and then stops. current 2 is 10.5 a. how long does current 2 have to un to deliver the same amount of charge as current 1? 88.28 192 s 2016 s 21,000 s

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

The inside surface of a cylindrical-shaped cave of inner diameter 1.0 m is continuously covered with a very thin layer of water. the cave is very long and it is open on both ends. the water on the cave surface is at a constant temperature of 15.5 °c. the cave is constantly exposed to wind such that 15.5 °c air flows through the cave at 4.5 m/s. the kinematic viscosity of the air is 14.66 x 10-6 m2/s and the molecular diffusion coefficient of water vapor in the air is 0.239 x 10-4 m2/s. because the cave diameter is so large, the flow of wind down the length of the cave, in the x direction, can be treated like it is external flow and the cave surface can be approximated as flat where appropriate. calculate the x value, in a) the transition to turbulent flow occurs at rex meters, where the air flow transitions from laminar to turbulent along the inside surface of the cave b) calculate the x value, in meters, where the bulk steady state concentration of water vapor in the air flowing in the cave is 10% of the saturation concentration. assume the air at the surface of the water layer is 100% saturated with water vapor. assume the wind entering the cave contained no moisture before it entered the cave. take into account the transition from laminar to turbulent flow when solving part b