Misc: what does "spf" stand for on a bottle of sunscreen?

Questions

Which Italian born US physicist won the 1938 Nobel Prize for Physics for his work on radioactive elements?

What form of light comes at wavelengths below 360 nanometers?

The Clifton Suspension Bridge spans which river?

From which sport does the phrase' to win hands down' come?

Which feature length Disney cartoon had a Scottish Terrier called Jock in it?