Apendulum is constructed from a thin, rigid, and uniform rod with a small sphere attached to the end opposite the pivot. this arrangement is a good approximation to a simple pendulum (period = 0.94 s), because the mass of the sphere (lead) is much greater than the mass of the rod (aluminum). when the sphere is removed, the pendulum is no longer a simple pendulum, but is then a physical pendulum. what is the period of the physical pendulum?

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.

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction