What is the density (g/cc) of a solid metal ball with a diameter 16mm, and a mass of 9.99g?

Express the following number in scientific notation. 0.026890 =

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.