Antiprotons and positrons are examples of ______________, which are not ordinary matter
Fill in the blank(s) with correct word
antimatter
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How do astronomers determine the distance to stars that are farther than 100 parsecs away?
a. measuring the shift of the stellar parallax b. estimating a star's spectral type and comparing it to the spectroscopic parallax c. subtracting absolute from apparent magnitudes d. using trigonometry in the triangulation method e. measuring the proper motion of a star
Two masses m1 and m2, with m1 < m2, have momenta with equal magnitudes. How do their kinetic energies compare?
a. KE1 < KE2 b. KE1 = KE2 c. KE1 > KE2 d. More information is needed.
What sort of politics flow around materials? Explain and give any example(s) you can
What will be an ideal response?
About how big is an atom?
a. too small to measure b. about a millionth of a meter across c. about a billionth of a meter across d. about a trillionth of a meter across e. none of the above