Si un objeto de masa m unido a un resorte ligero se reem- plaza por otro de masa 9m, la frecuencia de vibración del sistema cambia ¿en qué factor? a) 19 b) 31 c) 3.0 d) 9.0 e) 6.0. explicar

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?

An atom that has gained or lost electrons is called an _