A ?- particle is also known as
A) an electron.
B) a positron.
C) a helium nucleus.
D) a high-energy photon.
A
You might also like to view...
A surface has a work function 1.70 eV and has light of wavelength 400 nm shone on it. What is the kinetic energy of the photoelectrons emitted?
A) 4.52 eV B) 3.11 eV C) 1.41 eV D) 2.82 eV E) 1.70 eV
Anne S. Moffat, in a paper in Science "Engineering plants to cope with metals" (Ref. 41) says: "Many plants cope with
metals by binding them in complexes with a class of peptides called phytochelatins and sequestering the complexes inside their cells. Now three groups have isolated genes for the enzymes, called phytochelatin synthases, that make the metal-binding peptides when the cell is exposed to toxic metals. ... After searching genome databases, they also found counterparts of the plant genes in the roundworm Caenorhabditis elegans." What are the implications of finding the same genes to inactivate metals in both plants and animals?
When a solid changes to a liquid and then to a gas, energy is
1) released, 2) absorbed, and when gas changes to liquid and then to solid, energy is 3) released. 4) absorbed.
What advantages does a large-diameter astronomical telescope have over a telescope of a smaller diameter?
What will be an ideal response?