If two materials are made from different kinds of atoms, what else should you expect to be different?
a. the kinds of neutrons they have
b. the properties they have
c. the mass of their electrons
d. the charge of their protons

Why are some galaxies’ spectra blueshifted rather than redshifted? question 4 options:

Ablock of mass 1.5 kg slides down an inclined plane that has an angle of 15. if the inclined plane has no friction and the block starts at a height of 3 m, how much kinetic energy does the block have when it reaches the bottom? acceleration due to gravity is g = 9.8 m/s2. a. 6.8 j b. 50.9 j c. 0 j d. 44.1 j

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.