A block is connected to a spring. The spring constant k=75 N/m. The spring is displaced from the starting position of 0.250 m to 0.150 m. What is the spring force exerted on the block?

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.

The radius of a sphere is increasing at a rate of 9 cm/ sec. find the radius of the sphere when the volume and the radius of the sphere are increasing at the same numerical rate.

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?