If wavelength is equal to the distance travelled by the electron in one second , then :

how fast is an elecreon moving if it has a wavelength equal to the distance travelled in one second ?

If a freely falling body travels in the last second, a distance equal to the distance travelled by it in the first three second, the time of the travel is

In the given v-t graph the distance travelled by the body in 5 seconds will be

If a new unit of length is chosen such that the distance travelled by light in vacuum in one second is unity, then the distance between the sun and the earth in terms of the new unit of light takes 8 min and 20 s to cover this distance is __________.