calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from =7 to =1.

Jessica wants to get a credit card, but the bank is refusing to give her one. what could be the possible reason behind the bank's refusal to comply with jessica's request? a. she does not have an account with the bank b. she has a bad credit history c. she has a good credit history d. she is 18 years old e. she doesn't have a job

Rick is on a bicycle trip. every 4 days he bikes 230 km. if rick keeps this same pace for 16 days, how many kilometers will he bike?

All of the following are typical ways through which to find an apprenticeship except: a. guidance counselor b. trade association c. a vocational school d. job postings