Un tren viaja a una velocidad constante de 70km/h y pasa una señal en rojo, a 60 metros de pasar la señal comienza a reducir su velocidad a razón de 2m/s2 ¿ a que distancia de la señal se detiene por completo ? ¿ cuanto tarda en hacerlo a partir del momento en el que pasa la señal?

What are similarities and differences between refraction, reflection, diffraction and absorption?

Mga halaman/punong ornamental na di namumulaklak

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?