In which country is the Tis Issat Waterfall located?

Which of the following waterfalls is located in Iceland? What is the name of the highest waterfall in Sri Lanka? What is the height of the Vinnufossen Waterfall in Norway? What is the height of the Kegon Falls in Japan? In which US state is the Multnomah Falls located? What is the name of the waterfall on the border of Zambia and Zimbabwe? What is the name of the waterfall on the Argentina-Brazil border? Which river feeds the highest waterfall in Africa?