En una cuerda de 60 cm de longitud y densidad lineal de masa 12 g/m, tensada con una fuerza de 25 N y fija por ambos extremos se establece una onda estacionaria. a) Calcule la longitud de onda del armónico fundamental y la velocidad de propagación. b) Calcule las longitudes de onda de los 4 primeros armónicos c) Calcule las frecuencias de los 4 primeros armónico

How much heat is required to convert 0.3 kg of ice at 0°c to water at the same temperature

An charge with mass m and charge q is emitted from the origin, (x,y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.

Humidity is to blame for that muggy, steamy feeling you experience on some hot summer days. what gas in the atmosphere causes humidity? a) oxygen b) hydrogen c) nitrogen d) water vapor