Why does a biker have to peddle harder to travel at a constant speed into the
wind on a windy day, compared to travelling on the same road at the same speed
on a calm day.

Need this now! do pilots live long

Select all that applywhat are some basic resources a family is expected to provide for children? educationclothesspending

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j