6 Los amortiguadores de un automóvil viejo con masa de 1800 kg están gastados. Cuando una persona de 780 N se sube lentamente al auto en su centro de gravedad, el auto baja 30 cm.
Cuando el auto, con la persona a bordo, cae en un hoyo, comienza a oscilar verticalmente en
um movimiento armonico simple. Considere el auto y la persona como un solo cuerpo (una sola
masa) en un solo resorte y calcule (a) el periodo y (b) la frecuencia de oscilación.

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.

it is b. absorbs thermal energy

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m