How does the strong nuclear force hold the nucleus of an atom together?

a. it overcomes the electrical force of repulsion between protons in the nucleus.
b. it overcomes the electrical force of attraction between protons in the nucleus.
c. it overcomes the electrical force of repulsion between electrons in the nucleus.

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

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.

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?