Misc: nitroglycerin is used to relieve _____ pain?

Questions

Who, in 1977, was the first woman to ride in the Grand National?

Which astronomer and military band conductor discovered Uranus in 1781?

What is the alternative name for the coastal plant the sea pink, which featured on the reverse of the old threepenny bit?

Which birds are the only ones to fly backwards?

Which physicist and former surveyor discovered the law which bears his name explaining the tension of a spring?