Barnard's Star is a red dwarf. It is located 5.9 light years from Earth. (One light year is the same as 9.46 trillion kilometers.)

Which option should a person avoid doing in order to better protect the quality of watersheds? A) People should remove native plants around watersheds. B) People should use an alternative for synthetic pesticides.

In a nuclear experiment a proton with kinetic energy 1.0 MeV moves in a circular path in a uniform magnetic field. What energy must ( a. an alpha particle (q = + 2e, m = 4.0 u) and ( b. a deuteron (q = + e, m = 2.

Which activity is the best demonstration of J. J. Thomson's use of creativity in his work?

An isotope undergoes radioactive decay by emitting radiation that has a - 1 charge. What other characteristic does the radiation have? some shielding required no mass large mass high penetrating power

1. Directions: Select each correct answer. Biotic factors of an ecosystem could include which of the following? A. all types of plants B. the quantity of water available C. the temperature range D. all animal populations

During which two processes does a substance release energy? 1. | freezing and condensation freezing and melting evaporation and condensation evaporation and melting Submi

Lake michigan holds 1.35 x 10^15 gallons of water

N which orbitals would the valence electrons for selenium (Se) be placed? s orbital and f orbital s orbital only s orbital and p orbital d orbital only

Anne prepares a solution of copper nitrate with a concentration of 30 g/dm³. What mass of copper nitrate did she add to 100cm³ of water, in grams?

Chemists classify an element an element as a metal based on what physical properties