En una cuerda de longitud 3 m y densidad lineal 2,8 * 10-4 kg/m se producen ondas estacionarias a una frecuencia variable y la frecuencia fundamental es de 100 Hz. Calcule la frecuencia para el numero de antinodos n = 4. Exprese su resultado en Hertz y con dos lugares decimales.

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.

Which statements did both aristotle and ptolemy assume? check all that apply.