Which of the following material offers the highest resistivity? wood gold glass lead

The us government wants to allocate billions of dollars in the next 10 years to assure our future energy security. the funds will be spread among a variety of possible energy resources. where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas exploration, or a combination of sources? are there other efforts that should be explored? support your position with cited information for both questions.

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

What is the coefficient of kinetic friction μk between the block and the tabletop?