En una tempestad una persona observa un relámpago y 3 [s] después escucha el trueno. Si la rapidez de propagación del sonido en el aire es 340 m/s, ¿a qué distancia se produjo la descarga eléctrica?

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

its c i just checked it

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

the rearrangement of particles in a physical change. hope this